Despite its horrendous brake overheating issues, Jaguar is a brand that we desperately want to love. It's got the history, it's got the personality and it's getting better and better products. Sadly, those products still lack the completeness of those from better funded rivals like BMW and Mercedes. Maybe it's our fault for going into each new Jaguar hoping to find a car that's genuinely competitive, but whatever the reason, we walk away from each successive product underwhelmed. That's exactly the word we used to describe the 2008 Jaguar XKR after finding that it didn't handle with even an ounce of precision, had an automatic gearbox that refused to do what it was told and an interior that was partially amazing hand-stitched leather and partially parts sourced from a 1990s Ford Fiesta. It was fast though, the 420 HP supercharged 4.2-liter V8 was enough to spin the rear wheels up virtually everywhere.

So what's new for 2010? A sharper looking front bumper, LED taillights, different lower valance on the rear, body-color side vents, nicer leather door trim, a new steering wheel with a leather bottom spoke, the rotary drive selector from the XF operating a six-speed ZF automatic gearbox, an active limited-slip differential and continuously variable electronic shocks. So not a huge change except for the last and most important thing, the 510 HP, 461 Lb-Ft, 5.0-liter supercharged V8.

Did Jaguar just put a bigger engine in a car that didn't need more power to make up for all its other flaws? Yes. Yes it did.

Exterior Design: ☆☆☆

It's not like the 2010 XKR isn't a handsome car, it is, but the changes amount to very little and don't alter the boring headlights, the awkward front bumper (thank you pedestrian crash test regulations) with its distinct horizontal hood shut line or the impractical proportions. The XKR is a huge car outside, yet tiny on the inside.

The low roof-line means the top of my head sticks out over the top of the windscreen, making me look like a circus clown and forcing me to hunch down to see forwards. Dropping the top cures the horrendous rear 3/4 blindspots, but its inevitably going to rain sometime and when it does, if you don't want to get wet, that means you're not going to be able to change lanes confident in the knowledge that a car is 100% not next to you.

Interior Design: ☆☆

Despite the lack of vision while up, the XKR Convertible has convinced us that fabric convertible roofs are far superior to folding hard tops. It takes up only a tiny space in the trunk and is dead quiet while shut. It's even lined in nice material, creating the illusion that it's a real roof over your head.
Other than the rotary gear selector, which we're learning to like if only for its novelty (it brings no functional benefit over a standard selector, but does clean up the center console), the interior appears virtually unaltered over the old car. I guess there is the single leather-wrapped steering wheel spoke, but that leaves two nasty painted plastic spokes which just happen to be the ones you'll actually be touching.

Forgive me for going on a little bit of a rant here. Silver-painted plastic is possibly the worst material a luxury car maker could be using in a material right now, it's evocative of cheap, shitty phones and happy snap digicams from 1998. Consumer electronics have moved on to glass, metal and piano black, why can't cars? You'll find that horrible material not only on the steering wheel, but also on the door-mounted seat controls and on the controls for the sat/nav stereo and HVAC. Those are all parts you'll be looking at and touching regularly.

Elsewhere in the interior, things are much, much, much better with classy piano black taking a cue from iPhones and looking super nice. The contrast stitched leather used on the dash and seats is dreamy. It's also used on the rear seats, which appear to be there for no reason other than to hold shopping bags. There's probably better shopping bag storage solutions than pretend seats complete with seatbelts, but Jaguar must be hoping to really cash in on that doll collectors market.

Performance: ☆☆☆☆

Giving the XKR four stars is hard for me. It has probably the ultimate fast luxury car engine, but makes using it frustrating with an awkward gearbox. Developing its maximum torque of 461 Lb-Ft at just 2,500 RPM, you can safely apply every cliched auto journalist hyperbolic metaphor to its performance. It accelerates to 60 in a stump pulling 4.0 seconds. It rockets towards the horizon like a Saturn V. It does all that while delivering smoothness, refinement and a uniquely crisp exhaust note all Jaguar's own. We haven't driven this motor alongside the stronger LSA in the CTS-V, but we think we'd take the Jaguar's simply for its smoothness. The transition from cruising to light speed takes only a wiggle of your big toe, while plaid is delivered any time you plant your foot. It's a Druish miracle that I'm not writing this from a jail cell after playing with the car all over Brooklyn.

BMW take note, this Jaguar V8 makes all your torque-free M-car engines look limp wristed in comparison.

Thanks to that active differential, the XKR's ability to put its power down without wheelspin is now drastically improved, but unfortunately for your tire budget, Jaguar upped the power so much that it overcomes that newfound traction. That's part of the reason it can be so frustrating to try and tap into the performance, but the other is the gearbox.

Try to take off from a stoplight quickly in manual mode and you'll hook up pretty well in first, but when you grab second with the cheap plastic paddle, there's a good two-second delay between selection and engagement, spoiling what little fun you can have at low speeds. Much less powerful cars will easily beat you when the road slims down to one lane on the other side of an intersection. That shouldn't happen in a 510 HP 2+2. Things are much more predictable in automatic mode. The previous car's tendency to shift down two gears at unpredictable points in the throttle travel has been cured, probably by the plethora of torque making downshifts unnecessary, but when it does shift it's intrusively clunky. In Sport or Manual, it's difficult to come to a smooth halt with the shift into first coming with a pronounced jerk.

Combining a powerful engine with an auto transmission isn't necessarily a recipe for performance disaster, as proved by another small, troubled car manufacturer with the 2009 Maserati Quattroporte Sport GT S.

The brakes are powerful, easily modulated and, surprisingly, I couldn't convince them to fade.

Ride: ☆☆☆☆

The constantly variable dampers can be firmed up by selecting Competitive Mode, but they're always on the firm side of comfortable when you're cruising and on the soft side of taught when you're hauling ass. Luckily, they're bolted to a very strong aluminum frame so there's no scuttle shake even while tackling the East Coast's most challenging off-road course, the BQE.

Toys and Tech: ☆☆

Other than the rotary gear knob, there's nothing new to play with in the Jaguar's interior. We should probably count the 525-watt Bowers & Wilkins stereo as a toy, but you'll have to use it through Jag's horribly obtuse touch-screen interface and won't be able to hear it with the top down and the engine working and your head sticking out over the top of the windscreen anyways.

Value: ☆☆☆

The $102,000 XKR is cheaper than a $107,900 BMW M6 or a $135,000 Mercedes SL63, but cheaper cars do a better job of both performance and luxury, most notably the $88,800 Porsche 911 Convertible.

Overall: 60%

Does the new engine transform the XKR into an entirely different car? Surprisingly yes it does. But, it's an entirely different car with the same old problems. Very fast, pretty nice looking, fundamentally flawed. Thanks to the amazing new engine we're no longer underwhelmed with Jag's flagship, we're just frustrated that its still not able to live up to its now greater potential.

Suitability Parameters: Who Should Buy This?

● Poseurs
● Very Serious Businessmen
● Girlfriends of Sheiklets
● Jews who won't buy German
● Men who want handjobs

Suitability Parameters: Who Shouldn't Buy This?

● Penny Pinchers
● Speed Merchants
● Men with bald spots

Also Consider

● BMW M6 Convertible: torque-free engine, better handling, real back seats
● Mercedes SL63 AMG: just as fast, more fun to drive, bad image
● Porsche 911 Convertible: slower, yet way more fun
● Audi R8 Convertible: gorgeous, fast, fun, capable

Vitals:

Model Year: 2010
Make: Jaguar
Model: XKR Convertible
Trim: base w/20" wheels
Price, Base/As-Tested: $102,000 / $108,000
Engine: Supercharged, 32-valve, 5,000cc V8
Horsepower & Torque: 510 HP @ 6,00 RPM, 461 Lb-Ft @ 2,500 RPM
Transmission: 6-speed slushbox
Curb Weight: 4,079 Lbs
0-to-60: 4.0 secs (estimated)
Top Speed: 155 MPH (limited)
Crash Testing, Front/Rear/Side: not tested
Fuel Economy, EPA: 15 MPG City / 22 MPG Hwy

The one-off performance model features a lowered suspension and a tweaked exhaust system for a louder and more intimidating sound and was purposely built for the event, painted in an extremely distinct lime-green color while the coupe also featured special exterior graphics in gray and orange.

Other styling tweaks that differentiate this model over the standard 2010 XKR facelift include the 21-inch alloys and the satin graphite detailing to the front grilles, door mirrors, rear signature blade, side window surrounds, headlights and bonnet louvres.

What's more is Jaguar's engineers fiddled around with the XKR's supercharged 5.0-liter V8 that in standard form makes 510 HP and 461 lb-ft of torque launching the sports coupe from 0-to-60 MPH in 4.6 seconds. In the XKR Goodwood Special, output is lifted to 530 HP and torque to 516.2 lb-ft. No word on what that'll do to the final 0-to-60 time. Gallery below.

INTRODUCTION

“Built in tradition of great and tourers, with state-of-the-art engineering, aerospace-inspired construction and outstanding driving dynamics, the new XK is the latest in a long line of legendary performance Jaguars.” Mike O’Driscoll, Managing Director, Jaguar Cars.

The Jaguar sports car experience moves on to a new level in 2009 with the introduction of a new generation of the XK Coupe and Convertible.

With all-new engines, even more dramatic looks, a new interior, an advanced lightweight aluminum body structure and a wider range of models, the new XK builds on 60 years of legendary performance to deliver the best of everything Jaguar.

Designated 2010 model year but available summer 2009, the new XK range not only stands out from the crowd, it stands apart. The combined efforts of Jaguar's designers and engineers have produced a car that utilizes advanced technologies at a higher level than ever before.

The benefits of the XK's lightweight but incredibly stiff and strong chassis are already acknowledged. Not only does this architecture bring dynamic benefits thanks to its torsional rigidity, it also offers excellent safety and crash repair features – and provides the ideal base to optimize performance across the board, including fuel economy and CO2 emissions.

"The philosophy at Jaguar is for our designers and engineers to work together with all areas of the Jaguar business to develop elegant, inspired solutions to complex technical challenges. The result is great products – and the new XK is a perfect example." Mike O'Driscoll, Managing Director, Jaguar Cars

The all-new AJ-V8 Gen III engines are the most efficient Jaguar has ever produced. They deliver significantly more power and torque than the previous generation of engines: 510bhp and 461lb-ft of torque in the new supercharged XKR and 385bhp and 380lb-ft in the XK Portfolio.

With the introduction of these all-new 5.0-liter direct-injection V8 engines comes a new level of performance for the XK, with improved acceleration from standstill and stunning in-gear acceleration times. All models are electronically limited to a maximum speed of 155mph, but the 0-60mph sprint for naturally aspirated coupe models falls from 5.9 to 5.2 seconds, while for the supercharged XKR Coupe, 0-60mph is reduced from 4.9 to 4.6 seconds.

And yet thanks to a combination of excellent powertrain efficiency and the XK's advanced lightweight body architecture, all XKs offer strong fuel economy and impressive CO2 emissions ratings. Fuel economy is comparable to the previous generation of XK – despite the significant increases in performance – and CO2 emissions from each engine are better than the out-going versions, with the naturally aspirated version improving on that of the 4.2-liter V8 by two percent, while the supercharged engine produces one percent less CO2 than its predecessor. Indeed, the new generation XK is among the very best in both fuel economy and emissions for any V8-engined sports car.

"With an all-new, supercharged AJ-V8 engine and dramatic new looks, the new XKR has all the performance, power and panache that you expect in the ultimate sporting Jaguar." Mike O'Driscoll, Managing Director, Jaguar Cars

Allowing the engines to optimize their power is one of the most sophisticated transmissions available. Jaguar’s acclaimed electronically controlled, six-speed ZF 6HP28 transmission offers an unparalleled combination of driver control matched to virtually undetectable gearshifts. With control either from steering wheel-mounted paddles or full automatic mode via the JaguarDrive SelectorTM, which is new for the 10 Model Year XK, the transmission is now paired with an advanced electronic differential on the XKR model to ensure it accelerates even faster, handles more precisely and sets new standards of dynamic control and excellence.

There are two core models in the new XK range: the highly equipped XK Portfolio and the XKR, each with its own sporting character. In addition to the many changes under the skin, the new XKs are visually different to the previous generation. Each still looks just like a Jaguar should look – seductive, powerful and elegant – but all models, coupe and convertible, introduce revised exterior styling that underlines Jaguar’s contemporary thinking on design.

Inside, quality levels are raised even further with new interior trim and finishes that demonstrate Jaguar’s renowned craftsmanship, plus even more comprehensive specification. The driver is the center of attention, with exciting new ideas, including the acclaimed JaguarDrive Selector™, Adaptive Dynamics with Active Differential Control and comfort features such as heated and cooled seats – taking the driving experience of the new XK range to even higher levels of luxury alongside the improved performance.
“The new XK delivers more power, more performance and more technology – without compromise. It moves the Jaguar sports car experience on to a whole new level.” Mick Mohan, Director, Jaguar Programmes

The new XK range at a glance

– New generation of Jaguar XK sports coupe and convertible
– Exterior styling revised on all models
– Advanced aluminum body architecture is strong and lightweight and the key to optimizing performance, dynamic agility and competitive CO2 emissions and fuel economy
– All-new AJ-V8 Gen III direct-injection engines are the most powerful and efficient engines Jaguar has ever produced:
• 5.0-liter supercharged V8 delivers 510bhp, 461lb-ft of torque and propels XKR Coupe to 60mph in just 4.6 seconds.
• 5.0-liter naturally aspirated V8 engine delivers 385bhp, 380lb-ft of torque and propels XK Portfolio Coupe to 60mph in just 5.2 seconds.
– Improved CO2 emissions performance and comparable fuel economy to the smaller capacity and less powerful engines they replace
– New generation of XK is true to the heritage of Jaguar’s legendary performance and offers class-leading refinement and advanced technologies
– State-of-the-art six-speed automatic transmission has seamless gearshifts, plus for the first time on the XKR model an electronic differential to optimize traction and dynamic performance
– New design features, including exciting customer-friendly technologies such as the JaguarDrive SelectorTM first seen on the XF, further enhance performance, driving dynamics and the XK range’s unique luxury sporting character.
– Now two models in the range: XK Portfolio and XKR. Styling revisions include a new front bumper, new side mirrors with integrated LED side repeater, rear bumper spoiler, rear LED lights and color-coded side power vents for both coupe and convertible versions
– First customer deliveries in summer 2009.

All performance figures are manufacturer’s estimates.

THE NEW XK RANGE IN DETAIL

The new XK is a sophisticated grand tourer with the heart of a true sports car, combining effortless high-performance and state-of-the-art V8 powertrains with a new layer of advanced technologies, intuitive control, and Jaguar’s superbly crafted, new-fashioned luxury interiors. The range will continue to include both naturally aspirated XK and supercharged XKR, available in 2+2 coupe or convertible body styles.

All-new AJ-V8 Gen III 5.0-liter direct-injection engines bring significant improvements in power and torque and they do so with no compromise in terms of fuel economy and emissions. In both respects, every car in the new XK range, in spite of such large performance and flexibility gains, is comparable to their predecessors.

The impressive fuel economy is directly attributable to the combination of the XK range’s lowest-in-class weight and the all-new AJ-V8 Gen III engines. As well as the intrinsic advantages of the engines’ exceptionally light weight and compact dimensions, these technically advanced all-aluminum four-cam power units offer a number of features that deliver power with very high efficiency, including spray-guided direct injection (SGDI), which improves performance and economy, and dual independent variable cam timing (DIVCT), which benefits performance and economy and also reduces emissions.

The simplified and logical model range for the new XK essentially comprises just two clear choices – XK Portfolio and XKR. Each has its own specific choices of trim, color and fine detail, but every one has the same underlying sporting character and clear emphasis on efficient performance, luxury and craftsmanship. Beyond that, the XK vehicle personalization program also offers an extensive range of accessories that allow the customer to add further bespoke touches – inside and out.

Stunning performance increases

In naturally aspirated form, the new AJ-V8 Gen III 5.0-liter engine delivers 385bhp and 380lb-ft of torque – respectively 26 and 23 percent more than its 4.2-liter predecessor. The XKR’s supercharged 5.0-liter AJ-V8 Gen III R delivers a mighty 510bhp and 461lb-ft of torque – improvements of 23 and 12 percent respectively over the supercharged 4.2-liter engine.

On the road, while maximum speed remains under electronic control at 155mph, these power and torque gains allied to the lightweight aluminum body architecture of the
XK dramatically reduce acceleration times. For the naturally aspirated XK Portfolio, 0-60mph is reduced from 5.9 to 5.2 seconds; for the supercharged XKR, 0-60mph is reduced from 4.9 to 4.6 seconds.

The supercharged XKR is also impressively efficient, with an average consumption of 23.0mpg and a CO2 rating of 292g/km – an improvement over the previous XKR – and a remarkable 16 and 17 percent better, respectively, than the equivalent figures for the BMW M6.

Crucially, however, the XK also continues to better its closest rivals on economy and CO2 ratings, with an average consumption of 25.2mpg and a CO2 figure of 264g/km – a seven percent improvement on the equivalent figures for the Mercedes-Benz SL500.

The Looks – exterior styling

Visible changes on the new XK Portfolio and XKR reflect the significant changes under the skin. Carefully revised exteriors take the seductive, powerful, elegant lines that define Jaguar’s new design language and interpret them for a dramatically beautiful 2+2 sports car whose shape is even more taut, powerful and athletic. Evoking the essence of performance long before it moves, the new XK family shape is unmistakably ‘new-school’ sporting Jaguar: wholly contemporary, finely sculpted, efficiently packaged and precisely detailed.

Design Director Ian Callum outlines the new design features on the XK range:

“The current XK was the first car to signify a new generation of Jaguars – cars that have honed our image every bit as successfully as the original XK120 or E-type. Now the new XK range reinforces that message. The cars’ visual agility and beautiful lines have been enhanced with a distinctive new front end, rear lights and revised body styling that gives every model even more presence.”

The exterior changes for both the naturally aspirated XK Portfolio and the supercharged XKR are highlighted by a distinctive and purposeful new front bumper design, new LED rear lights and a new lower rear bumper spoiler. New LED rear light clusters incorporating fog lamps plus twin reversing lamps (rather than the previous single units) give every car in the new XK range a unique ‘night time signature’, while LED technology is also included in the integrated side repeater and approach lamps in the new exterior mirrors. Every car in the new XK range also features new engine covers and revised, body-colored side power vents.

Beyond the shared changes, subtle differences in detail distinguish each of the three models in the new XK range. Both the naturally aspirated XK Portfolio and the supercharged XKR display purposeful front bumper features with stylish, chrome-detailed inserts and further chrome detailing to the upper mesh grille. The XKR is set apart by also featuring chrome on its lower mesh grille - which is finished in black on the XK Portfolio model. All models now feature chrome detailing on window surrounds and rear signature blade, and in addition the XKR comes with a new rear bumper spoiler that is finished in body color and a revised tailpipe design further emphasizing its sporting performance.

The Looks – interior styling

Contemporary, sporting luxury, exceptional quality of craftsmanship and Jaguar’s renowned attention to detail are the keynotes of the new XK range’s enhanced interiors. The cabin is clean, elegant, spacious and remains entirely in harmony with the sporty character of the revised exterior.

The luxury character of the new XK range, however, is guaranteed, regardless of the customer’s choice of body style – hard-topped coupe or fabric-roofed convertible. Both benefit from the inherent strength of Jaguar’s lightweight aluminum architecture, which means that as well as being the lightest body structure in its class, the XK Portfolio and XKR’s shells also have the highest torsional strength. And that exceptional rigidity, with or without a fixed roof, means creak and rattle-free refinement on virtually any surface, however unforgiving.

Beyond that, the convertible’s triple-lined fabric roof gives a level of fit and stability even at very high speeds that minimizes wind noise and other road noise and includes a luxurious interior finish almost indistinguishable from a fixed roof. In addition, XK Portfolio and XKR models feature luxurious Jaguar Suedecloth headlining as standard.

It can, however, be powered up or down at the touch of a button in less than 18 seconds. And when it is lowered, the convertible’s flush-folding roof retracts completely into the bodywork behind the rear seats, under a smooth cover that retains the elegant, sporty lines of the car.

Nor does the convertible compromise the new XK range’s safety, for its roll-over protection system, which remains hidden unless it is needed, deploys instantaneously as necessary to provide occupants with the highest levels of protection.

For both coupe and convertible, the latest trim and feature enhancements are highlighted by the JaguarDrive Selector™, which is very neatly and elegantly packaged in the center console. The welcome to the car is also enhanced by new, bright treadplate inserts. Many of the other changes emphasize very high levels of Jaguar craftsmanship with new jewel-like touches. The three-spoke steering wheel now has a leather-wrapped lower spoke and Jaguar’s striking ‘growler’ badge. The new XKR’s instruments now further emphasize its performance character with red pointers, while all models adopt a new white illumination for their instruments.

New heated and cooled front seats are standard equipment on the new XK Portfolio and available on XKR with the optional R Performance interior. The XKR features 10-way seat adjustability for both driver and passenger seats, with heating and memory functions as standard and unique R seat style. The XK Portfolio and XKR with the optional R Performance interior have 16-way adjustable seats with heating and memory functions, adjustable side bolsters and new cooled seats as standard.

The door casings are even more luxuriously crafted than before, with saddle-stitched lines and a new interlayer to give a softer touch to the top shoulder of the casing. The leather door pulls also introduce twin-needle stitching and a soft-feel interlayer. In each door, the modified seat switch pack now includes single-piece chrome ‘highlight’ switches.

There is a wide choice of interior color options, including a new combination of Ivory seating with Oyster upper cabin trim and Oyster carpets. Soft-grain leather with contrast stitching is standard in the new XK Portfolio and in the new R Performance XKR.

Real wood veneers remain an important part of Jaguar craftsmanship and now include a new Rich Oak veneer option for the XK alongside the classic Burr Walnut for both models. The new XK range also offers the choice of Ebony uniquely for the new XK Portfolio, while the new XKR offers its own unique alternative in Dark Oak. A Knurled Aluminum veneer is also available on XK Portfolio, while Dark Mesh Aluminum is available on XKR.

Body architecture

Globally recognized as one of the key elements in Jaguar’s intelligent use of advanced technology, the XK’s industry-leading lightweight architecture constructs the entire body shell (the internal chassis structure and external body panels) from a combination of pressed, cast and extruded aluminum alloy components. These are riveted and bonded together using techniques originally developed in the aerospace industry and adapted for automotive use by Jaguar.

The result is a body shell with a depth of quality that is rooted in the highest structural integrity. It is also the lightest shell in its class by a significant margin and the most torsionally stiff. That all-round strength, remarkable rigidity and exceptional lightness underpin many aspects of the XK’s excellence, from fuel-efficient performance to its inherent safety, durability and refinement – and, of course, its precise chassis dynamics.

Mike Cross, Vehicle Integrity Chief Engineer, explains the benefits of this advanced body architecture:

“Lightness benefits agility, and agility with high performance defines the exhilarating yet refined nature of the Jaguar XK. It accelerates harder, stops more quickly and handles with true precision – setting new standards of dynamic excellence.”

All-new XK Powertrain Technology

• New AJ-V8 Gen III engines are more compact, more efficient and much more powerful
• 385bhp, 380lb-ft, 264g/km CO2, 25.2mpg combined fuel economy (naturally aspirated)
• 510bhp, 461lb-ft, 292g/km CO2, 23.0mpg combined fuel economy (supercharged – the Gen III R)
• Conforms to US ULEV II emissions regulations
• High efficiency, sixth-generation twin vortex supercharger on Gen III R engine
• Central spray-guided direct-injection increases efficiency and torque
• Torque-actuated variable camshaft timing on all four camshafts for improved response and efficiency
• Cam profile switching in naturally aspirated engine
• Variable-geometry inlet manifold on naturally aspirated engine further increases low and high-end torque
• Low-friction design optimizes fuel consumption
• 15,000-mile service intervals compared to 10,000-mile intervals on 4.2-liter models

Since the first XK was launched in 1948, generations of powerful yet refined engines have played a crucial role in establishing the unique character and pedigree of Jaguar cars. Now, the new 5.0-liter direct-injection engines continue that tradition, delivering increased power and torque with reduced emissions and impressive fuel economy. Available in two versions, the 510bhp supercharged V8 and the naturally aspirated 385bhp version, the new AJ-V8 Gen III engines exemplify Jaguar’s reputation for innovation and engineering excellence.

Commenting on the new engine range, Ron Lee, Powertrain Group Chief Engineer, said:

“We set ourselves the challenge of developing an all-new V8 engine series that improved on the performance and the refinement of the excellent 4.2-liter, with comparable fuel economy and improved emissions. We have achieved that with the AJ-V8 Gen III – a superbly responsive power unit of unsurpassed efficiency.”

Jaguar’s all-new V8s have been designed in-house, using the expertise of powertrain engineers at Jaguar’s advanced research and development centre at Whitley, Coventry, UK.

Malcolm Sandford, Engine Group Chief Engineer, explains the concept behind the project:

“The emphasis was on delivering efficiency, superior dynamic response and highly accessible low-end torque suited to real-world driving, without compromising power at higher engine speeds.”

The results are clear to see. Performance has been increased by 29 percent and 23 percent (87 and 94bhp) on both naturally aspirated and supercharged engines yet both the naturally aspirated and supercharged engines meet US ULEV II emissions regulations. Despite the significant increases in power, CO2 emissions of the naturally aspirated engine improve on that of the outgoing 4.2-liter V8, while the supercharged engine also produces less CO2 than its predecessor.

Top of the class in more ways than one

Both new AJ-V8 Gen III engines are state-of-the-art in every sense. The technical features have been engineered to deliver unparalleled efficiency, refinement, power and torque for which Jaguar is famous, combined with the lowest possible emissions. Low-speed torque characteristics and throttle response is world-class, while the supercharged version is the most economical 510bhp engine in the market to date.

Summarizing this achievement, Jaguar Programme Director, Mick Mohan, said:

“These engines have been designed by our Powertrain team of over 800 people for the next generation of Jaguar cars. They deliver fantastic straight-line performance and response which is second to none. The combination of power, refinement and driveability is what our customers expect of Jaguar. They are smooth around town, but when you want to drive quickly, the engines are hugely responsive and deliver that classic, Jaguar sound quality.”

Light, robust and very strong

The new V8 engines are built around a stiff, all-new, aluminum block with cast-in iron liners and cross-bolted main bearing caps to reduce noise, vibration and harshness. For the first time at Jaguar the blocks are high pressure die-cast, providing a superior finish and greater dimensional accuracy. The engines use aluminum heads, with four valves per cylinder and strong, spheroidal-graphite cast-iron crankshafts and forged steel connecting rods. The cylinder heads for the first time are specified with a secondary (recycled) aluminum alloy thus reducing the environmental impact of manufacturing the new engine.

The new 5.0-liter direct injection engines are more compact than their predecessors. Overall engine length has been reduced by 0.94-in. by relocation of the oil pump within the engine architecture. This length reduction improves engine bay packaging in support of enhanced safety cell performance while ensuring overall engine weight is virtually unchanged.

New supercharger – more for less

A sixth-generation, twin vortex system (TVS) supercharger is fitted to the XKR’s 510bhp engine. It is a compact Roots-type unit, feeding air through twin intercoolers, which in turn are water-cooled by their own discreet cooling circuit. The high helix rotor design improves the supercharger thermodynamic efficiency by 16 percent over its predecessor. It also improves noise quality to the point where the unit is now virtually inaudible (making supercharger whine a thing of the past). The intercoolers reduce the temperature of the pressurized intake-air and so optimize power and efficiency.

The new air intake has been radically redesigned compared to the previous V8. The intake air path is a direct feed to the supercharger inlet from the centrally mounted front throttle body. Air is delivered through twin air boxes, which reduce flow loss and further increase efficiency.

Mechanically, the new supercharger and its intercoolers are efficiently packaged in the ‘V‘ of the engine to deliver a low overall engine height in support of pedestrian safety requirements.

Industry-first direct injection - power with economy

One of the key features of the new engines is an industry-first, centrally-mounted, multi-hole, spray-guided fuel injection system, delivering fuel at a pressure of up to 150bar directly to the cylinder. This substantially contributes to improved low-speed, dynamic response. The positioning of the injectors ensures fuel is precisely delivered to the center of the combustion chamber, maximizing air-fuel mixing, and improving combustion control. Fuel is delivered via twin, high-pressure fuel pumps that are driven via auxiliary shaft in the all-new engine block.

The charge cooling effects of the direct-injection fuel system have allowed the compression ratio of the naturally aspirated engine to be raised to 11.5:1, further improving the engine economy. The supercharged engine also benefits from an increase from 9.0:1 in the previous 4.2-liter to 9.5:1.

During the engine warm-up phase, the combustion system employs multiple injection mode strategies to deliver 50 percent more heat for fast catalyst warm-up and substantially reduced emissions.

Torque-actuated variable-camshaft timing improves efficiency

A new type of variable camshaft timing system (VCT) introduces another new technology. The four VCT units are activated by the positive and negative torques generated by opening and closing the intake and exhaust valves, instead of by oil pressure. This has allowed the engine oil pump to be reduced in size, saving energy and reducing fuel consumption.
VCT units work independently on all four camshafts with 62 degrees of authority on the inlet cams and 50 degrees of authority on the exhaust cams. Timing is optimized by the engine control unit for torque, power and economy at every point in the engine’s speed range.

The new VCT units are capable of a response rate up to three times faster than before, with actuation rates in excess of 150 degrees per second. This delivers a more immediate engine response to the driver’s demand.

The naturally aspirated engine is also equipped with camshaft profile switching (CPS) on the inlet camshaft. Depending on the engine’s running conditions and the demands of the driver, the CPS will switch between a profile that is ideal for low-speed driving and another which gives increased valve lift for high performance.

Hydraulically-actuated two-piece tappets switch between profiles on the tri-lobe camshaft altering both the lift and duration. The cam lobe profile selected for lower engine speeds has a duration of 214° and lifts the valves 0.22-in. This optimizes gas velocity for improved low-speed torque and reduces valvetrain friction for improved fuel economy. For high-speed driving, CPS switches to a cam lobe with a duration of 250° and valve-lift of 0.41-in., allowing greater air flow into the engine for high power. Switching is activated at 2800rpm at high load, ranging to 4500rpm at light load conditions.

Variable Inlet Manifold optimizes torque through the rev range

A new variable inlet manifold (VIM) can vary the length of its eight inlet tracts to optimize power and torque throughout the rev range on the naturally aspirated engine. Vacuum-operated actuators open valves to select a longer, 27-in., inlet tract at low revs, increasing the rate of both the airflow and the engine torque. As the revs climb beyond 4700rpm, the actuators select a shorter, 14-in. path allowing a greater volume of air into the engine to optimize engine power. The actuator position is optimized by the engine control unit for improved torque throughout the engine speed range.

Reverse cooling turns up the heat

Every component in both V8 engines has been optimized for efficiency, performance, low-end torque and reliability. An innovative reverse-flow cooling system design has been employed to deliver thermodynamic and friction improvements. The reverse-flow cooling system pumps coolant through the cylinder heads before flowing through the block and returning to the radiator. The resulting cooler cylinder heads allow more optimum, knock-free, ignition timings to be used to improve efficiency.

In addition, the 22kW oil-to-water heat exchanger, packaged at the core of the engine, transfers heat from the coolant to the lubricating oil during warm up, bringing the oil up to operating temperature 14 percent faster than the previous cooling system. This improves fuel consumption in the crucial engine warm-up period by approximately 1%.

Reducing friction – something for nothing

Minimizing internal friction is key to improving fuel consumption and CO2 emissions, and as such was a key aim when it came to the design of the engines. As a result, the new Jaguar AJ-V8 Gen III engines achieve another best in class, setting a new industry benchmark for cranktrain efficiency.

All engine bearings were the subject of an extensive optimization program, reducing friction without compromising reliability. Diamond-Like Carbon Coating (DLC) has been used to reduce friction on the fuel pump tappets and a solid film lubricant has been used to coat the piston skirts. New engine oil has a lower viscosity, contributing to an extension in service intervals from 10,000 miles to 15,000 miles or 12 months. Both V8 engines are now fitted with an electronic dipstick feature for added peace of mind.

Unique, Jaguar sound quality

Sound quality is a key characteristic of all Jaguars and is one particular aspect that customers relish. With that in mind, Jaguar engineers have accentuated the acoustic feedback into the cabin in order to further enhance the driving pleasure.

The XK's exhaust sound track has been enhanced to provide a deeper and more powerful character that matches the increase in torque at low revs from the new engine. At higher engine speeds the intake acoustic feedback system combines with the exhaust system to provide more of that unique Jaguar sound quality character.

In addition to the fully active exhaust system in which valves open to provide a more rewarding note, the new XKR has been engineered to provide an intake feedback system to enhance the V8 sound character commonly absent on supercharged engines. Intake manifold pressure pulsations are fed into an acoustic filter at the rear of the engine that is tuned to provide an edgy sports car crescendo at high revs. The filter is controlled by the engine management system, which only allows the sound to enter the cabin under the appropriate driving conditions.

The new intake feedback system combined with the fully active exhaust system provides the most exhilarating sound track yet delivered on a Jaguar.

New, integrated transmission completes the package

Any transmission is a major factor in delivering the performance that drivers’ desire, while integrating with the engine to optimize emissions and fuel consumption. Jaguar’s acclaimed electronically controlled, six-speed ZF 6HP28 transmission offers an unparalleled combination of driver control matched to virtually undetectable gearshifts. With control either from steering wheel-mounted paddles or full automatic mode via the JaguarDrive SelectorTM, the new XK range delivers exhilarating performance.

The supercharged V8 engine with 510bhp and 461lb-ft of torque transmits power through an uprated version of the ZF 6HP28, additional clutch plates and an uprated torque converter having been added to the transmission to accommodate the extra power.

The transmission has a fully-adaptive shift system which delivers seamless gearshifts and optimizes performance and economy at all times. It also continually adapts to suit driving style, which can vary from sporting to more economical. The ‘mechatronic’ control module incorporated inside the transmission includes the software for the semi-automatic Jaguar Sequential Shift function, selected when the driver operates either of the two steering-wheel paddles.

The high levels of torque produced by the new engines make it possible for the torque converter lock-up feature of the transmission to be used even at low speeds, without slip. This approach provides an additional fuel consumption benefit, contributing to the official combined fuel economy of 23.0mpg in the XKR. The advanced design of the transmission also includes a torsional damper to absorb firing impulses from the engine, further smoothing the driveline. The transmission is designed to be maintenance-free and the fluid is ‘filled-for-life.’

Another first for Jaguar is the new Active Differential Control (ADC), the final stage of the supercharged V8 driveline, which is designed to give improved traction and dynamic stability. The electronically controlled differential continuously adapts to both the driver’s demands and the amount of grip available at each individual wheel. Operated by an internal electric motor and ‘ball-and-ramp’ mechanism, the differential contains a multi-plate clutch which transmits or ‘vectors’ torque to the wheel with most grip and therefore maximizes the car’s traction. The multi-plate clutch assembly is designed to prevent excessive differential slip, but differs fundamentally from a conventional traction control system, which uses the brakes to counteract differential slip, after it has occurred.

For the first time, the new XK range introduces the innovative JaguarDrive Selector™ as its transmission control interface. First seen on the Jaguar XF sedan, the JaguarDrive Selector™ features a rotary shift control which rises into the driver’s hand as the car is started, to give intuitive, ergonomically efficient transmission control from an extremely neat, space-efficient interface.

The selector is, in fact, much more than just an unobtrusive yet completely practical solution to selecting an automatic gear mode. For it also imbues the car with a strong driver 'handshake'. Get into an XK and the start button in front of the JaguarDrive SelectorTM pulses red, like a heartbeat. Press this button to start the engine and the cast alloy JaguarDrive SelectorTM rises into the palm of your hand.

From there, automatic transmission functions are selected simply by turning the control with the fingertips. As an example, Drive to Drive Sport selection is accomplished with a simple push and turn action. Returning from S to D, the rotary control operates with spring-assistance, which eliminates the need to pull the Selector. It couldn’t be simpler. And when the engine is stopped, the JaguarDrive Selector™ returns automatically to its Park position.

Driving Dynamics

“The XK has always been an exceptional sports GT, now it has evolved into something even more exhilarating in the form of the XKR. With huge reserves of power and torque it sets new standards of dynamic balance, succeeding in being both very potent and rewarding yet balanced and accessible at the same time.”
Mike Cross, Vehicle Integrity Chief Engineer.

The new ‘handshake’ of the JaguarDrive Control is a subtle reminder of the new XK range’s further enhanced sporting character and superb dynamics, that make the driving experience exceptionally exciting and rewarding, as expected of a true sports car and a classic grand tourer. The latest generation of Adaptive Dynamics replaces Jaguar’s proven Computer Active Technology Suspension (CATS) with an even more sophisticated solution. Active damper tuning systems remove many of the compromises of a passive damping system - which must make a single choice between softer damping for a comfortable ride and firmer damping for more tautly controlled handling. CATS overcame that compromise with automatically switchable damping modes, adapting to the road and how the car was driven. But where CATS only offered two settings: 'soft' and 'firm', the new Adaptive Damping System in effect provides a continuously variable damping strategy between wide extremes, benefitting ride comfort, ultimate control handling and grip.

Its three primary functions are to control body vertical movement, roll rate and pitch rate. One hundred times a second, Adaptive Damping analyzes induced body motions and sets each damper to an appropriate level in order to maintain a constant and level body attitude – optimizing control without compromising ride. Also one hundred times a second, it predicts the roll rate due to steering inputs and selectively increases damping forces to reduce the roll rate – improving handling feel and driver confidence. And one hundred times a second, Adaptive Damping analyzes fore and aft pitch rate due to throttle and braking inputs and again varies damping forces to reduce pitch – further improving comfort and control.

Additionally, Adaptive Dynamics improves ride quality by monitoring wheel position five hundred times a second and automatically increasing damping rate as the suspension approaches the limits of its travel. Similarly it controls wheel hop on uneven roads by varying damping to move any wheel out of its natural bouncing frequency.

From the cabin, the JaguarDrive Control™ interface allows the driver to interact with Adaptive Dynamics by selecting modes for different driving conditions and moods. In Dynamic Mode, Adaptive Dynamics increases body control for a sportier feel. Dynamic Mode also interacts with the management electronics to give a more responsive accelerator pedal reaction and quicker gearshift responses.

Winter Mode was introduced on the XF and makes its first appearance in the XK range here, adding another element of dynamic subtlety. Where Dynamic Mode offers a more sporty feel, Winter Mode offers a more damped accelerator pedal response for progressive control in slippery conditions, with bespoke shift settings that delay and soften gearshifts, again for better control with low grip.

In keeping with its additional power and performance, the new XKR offers the most sophisticated dynamic control of all, with Active Differential Control and Adaptive Dynamics operating in tandem to offer JaguarDrive Optimization™. This fully integrates the functions of JaguarDrive Control™ and Adaptive Dynamics with the new Active Differential Control (ADC) – an electronically controlled alternative to the traditional mechanical limited-slip differential, with far more subtle control strategies.

ADC is fully automatic and can vary its locking torque (and therefore the proportion of torque sent to each driven wheel) depending on surface conditions and power applied. Its subtle control strategies optimize traction at each wheel, improving acceleration on low-grip surfaces but also potentially improving stability when required.

Working with other systems such as traction control and the ABS braking function, ADC can significantly improve overall vehicle performance, and provide more precise driving feel.

While the less powerful XK Portfolio does not adopt the Active Differential Control of the XKR, they do still utilize a new upgraded mechanical differential, which delivers outstanding levels of grip and stability under power.

The Dynamic Stability Control system for the new XK range has bespoke tuning and offers four driver-selectable modes, Normal, Winter, Trac DSC and DSC OFF, for all models. Normal mode is ideal for everyday driving and is the default setting activated automatically on starting. The Winter mode – introduced for the first time on the XK range – is designed to improve drivability and confidence in more slippery conditions. Trac DSC mode is a sportier setting allowing the experienced driver to fully exploit the car’s performance and enjoy greater involvement in controlling it. DSC OFF allows the driver (where circumstances are appropriate) to switch the system’s electronic protection off completely, by pushing the DSC control button for ten seconds.

Technology and driving aids

The new XK Portfolio and XKR, in both coupe and convertible form, offer a number of other driver aids that exploit the latest advanced technology. Staying faithful to its well-established principles, Jaguar uses these technologies to empower, not to overpower the user – enhancing driver and passenger enjoyment rather than risking high-technology overkill.

Among the new XK range’s practical features are intelligent front lighting incorporating bi-xenon automatic headlamps with power wash; dynamic headlamp leveling; corner lights that are activated by the direction indicators to improve visibility while cornering; and the option of Active Front Lighting. Standard equipment across the new XK range also includes air sensors to optimize cabin air quality through the climate control system, keyless start, cruise control, electro-chromatic fold-back exterior mirrors, and front and rear Park Assist.

Safety

Jaguar’s Emergency Brake Assist is standard on the new XK and Advanced Emergency Brake Assist is fitted to all models with Adaptive Cruise Control (ACC). Advanced Emergency Brake Assist uses the ACC radar to calculate distance from and speed of approach to the vehicle ahead and pre-charges the brake-line pressure to minimize impact speed if a collision is predicted – with an audible warning to the driver.

For the occupant, every car in the new XK range includes front, side and thorax airbags, incorporating new technology which reduces the load on the occupant’s body if the front airbag is deployed. Jaguar’s Adaptive Restraint Technology System checks for seat occupation, seatbelt use, seat position, and the direction and severity of any impact, and uses all that information to determine the appropriate level of airbag deployment in any incident. Additionally, Jaguar’s Protec front head restraint system protects against whiplash in the event of a rear impact.

Stylish new wheels

The new XK range introduces five new alloy wheel designs, some of them replacing earlier designs, some introducing completely new additional choices. Together, they bring the total number of alloy wheel options on the new XK range to six.

The new 19-inch ten-‘V’-spoke Caravela wheel is now standard on XK Portfolio. The all-new 19-inch 10-fan-spoke Artura design is available in painted or chromed finishes and in conventional or run-flat types. These Artura wheels are offered as options on XK Portfolio and (in run-flat form) on XKR. Another all-new wheel, the 19-inch ten-spoke Tamana design, becomes standard equipment on XKR and is unique to the model.
A new 19-inch mini-spare is introduced as standard equipment for the XKR, while the weight and space-saving Instant Mobility System still takes the place of a spare wheel on the XK Portfolio.

Distinctive 20-inch wheels continue as a very sporty option across the new XK range - emphasizing the cars’ sporting dynamics and assertive, muscular looks. The new designs include two 20-inch wheels: the twin-five-spoke Kalimnos is optional for XK Portfolio and XKR while the twin-seven-spoke R Performance Nevis design is a unique option for the XKR, and an addition to the wheel range.

With the recent addition of new options Claret, Spectrum Blue, and Kyanite Blue, the stunning exterior color range for the new XK Portfolio and XKR is extended to 15 colors; two of which - Salsa and Kyanite Blue - are reserved exclusively for XKR.

Equipment

In true, contemporary Jaguar fashion, a great deal of useful and intuitive technology is controlled by the clear and elegant seven-inch Touch-screen in the center console – which is standard on all models. On the new XK Portfolio and XKR, the Touch-screen provides access and control for the Climate Control and Audio systems, for the Satellite Navigation System, for Bluetooth mobile connectivity and for Jaguar’s Portable Audio Interface – which are all standard equipment. The satellite navigation system offers DVD mapping, postcode entry and a traffic message channel. The Portable Audio Interface offers iPod connectivity, and the connection of other storage devices through a USB port, to the in-car sound system, with full Touch-screen control.

The audio system options for the new XK range include available HD Radio, single-slot or multi-disc CD changers and either Jaguar Premium Sound or the ultimate, high-end Bowers & Wilkins system. The Bowers & Wilkins option is a 525-watt system with Dolby® ProLogic®II Surround Sound, three-channel stereo with unique amplifier, Kevlar mid-range speakers with high output and low distortion and specially designed aluminum tweeters.

For the North American market, Digital Radio options are available such as HD radio in the States, and SDARS satellite radio in both the States and Canada.

Ease of ownership

For all their performance and luxury, the new XK Portfolio and XKR are designed to be totally dependable cars to live with. Both naturally aspirated and supercharged versions of the new 5.0-liter AJ-V8 Gen III engine offer extended service intervals – now at one year or 15,000 miles rather than 10,000. All new XKs now feature oil quality and brake pad wear indicators, allowing those critical areas to be easily monitored on a regular basis by the driver. And in the event of an accident, bolt-on front and rear sections to help minimize repair costs.

“The XK has always been an exceptional sports car. Now, it has evolved into something even more exhilarating, combining Jaguar’s legendary performance, new advanced technologies and crafted luxury to create a sports car without parallel.” Russ Varney, Chief Programme Engineer, XK Series

Press Release:

The new Jaguar XKR is a sophisticated grand tourer with the heart of a true sports car, combining effortless high-performance and state-of-the-art V8 powertrains with a new level of advanced technologies, intuitive control and Jaguar's superbly crafted, new-fashioned luxury interiors. The range comprises naturally aspirated XK and supercharged Jaguar XKR models, available in 2+2 coupe or convertible body styles.

All-new AJ-V8 Gen III 5.0-litre direct-injection engines bring significant improvements in power and torque and they do so without compromising fuel economy and emissions. In both respects, every model in the new XK range, in spite of such large performance and flexibility gains across the board, is comparable to their predecessors.

The impressive fuel economy for such powerful cars is attributable to the combination of the XK range's lowest-in-class weight and the all-new AJ-V8 Gen III engines. As well as the intrinsic advantages of the engines' light weight, these advanced all-aluminium four-cam power units have a number of features that deliver power with very high efficiency, including spray-guided direct injection (SGDI), which improves performance and economy, and dual independent variable cam timing (DIVCT), which benefits performance and economy, while also reducing emissions.

The simplified and logical model range for the new XK comprises three clear choices - XK, XK Portfolio and supercharged Jaguar XKR. Each has its own specific choices of trim, colour and fine detail, but every one has the same underlying sporting character and clear emphasis on efficient performance, luxury and craftsmanship. Beyond that, the XK vehicle personalisation programme also offers an extensive range of accessories that allow the customer to add further bespoke touches, both inside and out.

Performance on a new level

In naturally aspirated form, the new AJ-V8 Gen III 5.0-litre engine delivers 385PS (SAE) and 380lb ft (515Nm) of torque - respectively 26 and 23 percent more than its 4.2-litre predecessor. The Jaguar XKR's supercharged 5.0-litre version delivers a mighty 510PS (510bhp SAE) and 461lb ft (625Nm) of torque - improvements of 23 and 12 percent respectively over the supercharged 4.2-litre engine.

On the road, while maximum speed remains under electronic control at 155mph (250kph), these power and torque gains allied to the lightweight aluminium body architecture of the XK dramatically improve acceleration times. For the naturally aspirated XK, 0-60mph is reduced to 5.2 seconds from 5.9 seconds (and 0-100kph from 6.2 to 5.5 seconds); for the supercharged Jaguar XKR, 0-60mph is reduced to 4.6 seconds from 4.9 (and 0-100kph to 4.8 seconds from 5.2).

The supercharged Jaguar XKR is also impressively efficient, with combined fuel economy of 23.0mpg and a CO2 rating of 292g/km - an improvement over the previous Jaguar XKR - and 16 and 17 percent better, respectively, than the equivalent figures for the BMW M6.

Crucially, however, the naturally aspirated XK also continues to better its closest rivals on economy and CO2 ratings, with an average consumption of 25.2mpg and a CO2 figure of 264g/km - seven percent better than the equivalent figures for the Mercedes-Benz SL500 thanks to its fuel efficient engine and significantly lower kerb weight: 1660kg compared to the SL500's 1845kg.

Exterior design

Visible changes on the new XK and XKR reflect the significant changes under the skin. Carefully revised exteriors take the seductive, elegant lines that define Jaguar's new design language and interpret them for a beautiful 2+2 sports car whose shape is even more taut, powerful and athletic. Evoking the essence of performance long before it moves, the new XK family shape is unmistakably 'new-school' sporting Jaguar: wholly contemporary, finely sculpted, efficiently packaged and precisely detailed.

The exterior changes for the naturally aspirated XK models and the supercharged Jaguar XKR are highlighted by a distinctive and purposeful new front end design, new LED rear lights and a new lower rear body valance. New LED rear light clusters incorporating fog lamps plus twin reversing lamps (rather than the previous single lamp units) give every new XK a unique 'night time signature', while LED technology is also included in the integrated side repeater and approach lamps in the new exterior mirrors. Every new XK also features revised body-coloured side power vents.

Beyond the shared changes, subtle differences in detail distinguish each of the three models in the new XK range. All display purposeful front bumper features with stylish, chrome-detailed inserts and further chrome detailing to the upper mesh grille. The Jaguar XKR is set apart by also featuring chrome on its lower mesh grille - which is finished in black on the XK and XK Portfolio models. All models now feature chrome detailing on window surrounds and rear signature blade, and in addition the Jaguar XKR comes with a new lower rear valance that is finished in body colour and a revised tailpipe design, further emphasising its sporting performance.

Interior design

Contemporary, sporting luxury, exceptional quality of craftsmanship, and Jaguar's renowned attention to detail are the keynotes of the new XK range's enhanced interiors. The cabin is clean, elegant and spacious, and remains entirely in harmony with the sporting character of the revised exterior.

The luxury character of the new XK and XKR, however, is guaranteed, regardless of the customer's choice of body style - hard-topped coupe or fabric-roofed convertible. Both benefit from the inherent strength of Jaguar's lightweight aluminium architecture, which means that as well as being the lightest body structure in its class, the body shells also have the highest torsional strength. And that exceptional rigidity, with or without a fixed roof, means creak and rattle-free refinement, even on unforgiving surfaces.

Beyond that, the convertible's triple-lined fabric roof gives a level of fit and stability, even at very high speeds, that minimises wind noise and other road noise and includes a luxurious interior finish almost indistinguishable from a fixed roof. In addition, XK Portfolio and XKR models feature luxurious Jaguar Suedecloth headlinings as standard.

The folding roof can be powered up or down at the touch of a button in less than 18 seconds. And when it is lowered, the convertible's flush-folding roof retracts completely into the bodywork behind the rear seats, under a smooth cover that retains the elegant, sporting lines of the car. A roll-over protection system, which remains hidden unless it is needed, deploys instantaneously as necessary to provide occupants with the highest levels of protection in the event of an incident.

For both coupé and convertible, the latest feature enhancements are showcased by the JaguarDrive Selector™, which is neatly and elegantly packaged in the centre console. The welcome to the car is also enhanced by new, bright treadplate inserts. Many of the other changes emphasise high levels of Jaguar craftsmanship with new jewel-like touches. The three-spoke steering wheel now has a leather-wrapped lower spoke, and Jaguar's striking 'growler' badge. The new Jaguar XKR's instruments further emphasise its performance character with red pointers, while all models adopt a new white illumination for their instruments.

New heated and cooled front seats are standard equipment on the new XK Portfolio and on XKR with the optional R Performance interior (dependent on market), and available as an option on the XK. The XK features 10-way seat adjustability for both driver and passenger seats, with heating and memory functions as standard - while the Jaguar XKR seats have similar functions but with the unique R seat style. The XK Portfolio and XKR with the optional R Performance interior have 16-way adjustable seats with heating and memory functions, adjustable side bolsters and new cooled seats as standard.

The door casings are even more luxuriously crafted than before, with saddle-stitched lines and a new interlayer to give a softer touch to the top shoulder of the casing. The leather door pulls also introduce

twin-needle stitching and a soft-feel interlayer. In each door, the modified seat switch pack now includes single-piece chrome 'highlight' switches.

There is a wide choice of interior colour options, including a new combination for the XK Portfolio and XKR of Ivory seating with Oyster upper cabin trim and Oyster carpets. Bond grain leather is standard on the new XK interior, and an even higher quality soft-grain leather with contrast stitching is standard in the XK Portfolio and the new R Performance Jaguar XKR.

Real wood veneers remain an important part of Jaguar craftsmanship and now include a new Rich Oak veneer option alongside the classic Burr Walnut for all three models. The new XK Portfolio also offers the choice of an Ebony veneer, while the Jaguar XKR offers its own unique alternative in Dark Oak. A Knurled Aluminium veneer is also available on XK and XK Portfolio, while Dark Mesh Aluminium is available on XKR.

Industry-leading lightweight body architecture

Globally recognised as one of the key elements in Jaguar's intelligent use of advanced technologies, the XK's industry-leading lightweight architecture constructs the entire body shell (the internal chassis structure and external body panels) from a combination of pressed, cast and extruded aluminium alloy components. These are riveted and bonded together using techniques originally developed in the aerospace industry and adapted for automotive use by Jaguar.

The result is a body shell with a depth of quality that is rooted in the highest structural integrity. It is also the lightest shell in its class by a significant margin and the most torsionally stiff. That all-round strength, rigidity and lightness underpin many aspects of the XK's excellence, from fuel-efficient performance to its inherent safety, durability and refinement - and, of course, its precise chassis dynamics.

The most advanced Jaguar V8 engines ever

Since the first XK was launched in 1948, generations of powerful yet refined engines have played a crucial role in establishing the unique character and pedigree of Jaguar cars. Now, the new 5.0-litre V8 direct-injection engines continue that tradition, delivering increased power and torque with reduced emissions and impressive fuel economy. Available in two versions - the supercharged 510PS and naturally aspirated 385PS - the new AJ-V8 Gen III engines exemplify Jaguar's reputation for innovation and engineering excellence.

The results are clear to see. Performance has been increased by 29 percent and 23 percent (87 and 94PS) on the naturally aspirated and supercharged engines respectively, yet both meet EU5 and US ULEV2 emissions regulations. Despite the significant increases in power, both have better emissions and comparable fuel economy to the previous 4.2-litre units.

Both new AJ-V8 Gen III petrol engines are state-of-the-art in every sense. The technical features have been engineered to deliver unparalleled efficiency, refinement, power and torque for which Jaguar is famous, combined with the lowest possible emissions. Low-speed torque characteristics and throttle response are world-class, while the supercharged version is one of the most economical 5.0-litre V8 engine available.

Light, robust and very strong

The new AJ-V8 engines are built around a stiff, all-new, aluminium block with cast-in iron liners and cross-bolted main bearing caps to reduce noise, vibration and harshness. The blocks are high pressure die-cast, providing a superior finish and greater dimensional accuracy. The engines use aluminium heads, with four valves per cylinder and spheroidal-graphite cast-iron crankshafts and forged steel connecting rods. The cylinder heads for the first time are specified with a secondary (recycled) aluminium alloy thus reducing the environmental impact of manufacturing the new engine.

The new 5.0-litre direct injection petrol engines are more compact than their predecessors. Overall engine length has been reduced by 24mm by relocation of the oil pump within the engine architecture. This length reduction - apparently a small amount - improves engine bay packaging in support of enhanced safety cell performance while ensuring overall engine weight is virtually unchanged.

New supercharger optimises power

A sixth-generation, twin vortex system supercharger is fitted to the Jaguar XKR's 510PS engine. It is a compact Roots-type unit, feeding air through twin intercoolers, which in turn are water-cooled by their own discreet cooling circuit. The high helix rotor design improves the supercharger thermodynamic efficiency by 16 percent over its predecessor. It also improves noise quality to the point where the unit is now virtually inaudible (making supercharger whine a thing of the past). The intercoolers reduce the temperature of the pressurised intake-air and so optimise power and efficiency.

The new air intake has been radically redesigned compared to the previous V8. The intake air path is a direct feed to the supercharger inlet from the centrally mounted front throttle body. Air is delivered through twin air boxes, which reduce flow loss and further increase efficiency.

Mechanically, the new supercharger and its intercoolers are efficiently packaged in the 'V' of the engine to deliver a lower overall engine height in support of pedestrian safety requirements.

Direct injection - power with economy

One of the key features of the new petrol engines is an industry-first, centrally-mounted, multi-hole, spray-guided fuel injection system, delivering fuel at a pressure of up to 150bar directly to the cylinder. This substantially contributes to improved low-speed, dynamic response. The positioning of the injectors ensures fuel is precisely delivered to the centre of the combustion chamber, maximising air-fuel mixing and improving combustion control. Fuel is delivered via twin, high-pressure fuel pumps that are driven via auxiliary shaft in the all-new engine block.

The charge cooling effects of the direct-injection fuel system have allowed the compression ratio of the naturally aspirated engine to be raised to 11.5:1, further optimising the engine economy. The supercharged engine also benefits from a compression ratio increase to 9.5:1 from 9.0:1 in the previous 4.2-litre.

During the engine warm-up phase, the combustion system employs multiple injection mode strategies to deliver 50 percent more heat for fast catalyst warm-up and emissions reduction.

Torque-actuated variable-camshaft timing improves efficiency

A new type of variable camshaft timing (VCT) system introduces another new technology. The four VCT units are activated by the positive and negative torques generated by opening and closing the intake and exhaust valves, instead of by oil pressure. This has allowed the engine oil pump to be reduced in size, saving energy and improving fuel consumption.

VCT units work independently on all four camshafts with 62 degrees of authority on the inlet cams and 50 degrees of authority on the exhaust cams. Timing is optimised by the engine control unit for torque, power and economy at every point in the engine's speed range.

The new VCT units are capable of a response rate up to three times faster than in previous Jaguar engines, with actuation rates in excess of 150 degrees per second. This delivers a more immediate engine response to the driver's demand for power.

The naturally aspirated engine is also equipped with camshaft profile switching (CPS) on the inlet camshaft. Depending on the engine's running conditions and the demands of the driver, the CPS will switch between a profile that is ideal for low-speed driving and another which gives increased valve lift for high performance.

Hydraulically-actuated two-piece tappets switch between profiles on the tri-lobe camshaft altering both the lift and duration. The cam lobe profile selected for lower engine speeds has a duration of 214° and lifts the valves 5.5mm. This optimises gas velocity for improved low-speed torque and reduces valvetrain friction for improved fuel economy. For high-speed driving, CPS switches to a cam lobe with a duration of 250° and valve-lift of 10.5mm, allowing greater air flow for high power. Switching is activated at 2800rpm at high load, ranging to 4500rpm at light load conditions.

Variable Inlet Manifold optimises torque through the rev range

A new variable inlet manifold (VIM) on the naturally aspirated engine can vary the length of its eight inlet tracts to optimise power and torque throughout the rev range. Vacuum-operated actuators open valves to select a longer, 680mm, inlet tract at low revs, increasing the rate of both the airflow and the engine torque. As the revs climb beyond 4700rpm, the actuators select a shorter, 350mm path allowing a greater volume of air into the engine to optimise power. The actuator position is monitored by the engine control unit to improve torque throughout the engine speed range.

Reverse cooling turns up the heat

Every component in both V8 engines has been optimised for efficiency, performance, low-end torque and reliability. An innovative reverse-flow cooling system design has been employed to deliver thermodynamic and friction improvements. The reverse-flow cooling system pumps coolant through the cylinder heads before it flows through the block and returns to the radiator. The resulting cooler cylinder heads allow more optimum, knock-free, ignition timings.

In addition, the 22kW oil-to-water heat exchanger, packaged at the core of the engine, transfers heat from the coolant to the lubricating oil during warm up, bringing the oil up to operating temperature 14 percent faster than the cooling system used in the 4.2-litre V8. This improves fuel consumption in the crucial engine warm-up period by approximately one percent - again a small amount, but part of a package of efficiencies.

Reducing friction - something for nothing

Minimising internal friction is key to improving fuel consumption and CO2 emissions, and as such was a key aim when it came to the design of the engines. As a result, the new Jaguar AJ-V8 Gen III engines achieve another best in class, setting a new industry benchmark for cranktrain efficiency.

All engine bearings were engineered for reduced friction without compromising reliability. Diamond-Like Carbon Coating (DLC) has been used to reduce friction on the fuel pump tappets and a solid film lubricant has been used to coat the piston skirts. New engine oil has a lower viscosity, contributing to an extension in

service intervals from 10,000 miles to 15,000 miles (or 12 months). Both V8 engines are now fitted with an electronic oil-level indicator for added peace of mind.

Unique, Jaguar sound quality

Sound quality is a key characteristic of all Jaguars and is one particular aspect that customers relish. With that in mind, Jaguar engineers have accentuated the acoustic feedback into the cabin in order to further enhance the driving pleasure.

The XK's exhaust 'sound track' has been enhanced to provide a deeper and more powerful character that matches the increase in torque at low revs from the new engine. At higher engine speeds the intake acoustic feedback system combines with the exhaust system to provide more of that unique Jaguar sound quality character.

In addition to the fully active exhaust system in which valves open to provide a more rewarding note, the new XKR has been engineered to provide an intake feedback system to enhance the V8 sound character commonly absent on supercharged engines. Intake manifold pressure pulsations are fed into an acoustic filter at the rear of the engine that is tuned to provide an edgy sports car 'crescendo' at high revs. The filter is controlled by the engine management system, which only allows the sound to enter the cabin under the appropriate driving conditions.

The new intake feedback system combined with the fully active exhaust system provides the most exhilarating aural experience yet delivered on a Jaguar.

Uprated six-speed transmission handles extra power

Any transmission is a major factor in delivering the performance that drivers desire, while integrating with the engine to optimise emissions and fuel consumption. Jaguar's acclaimed electronically controlled, six-speed ZF 6HP28 transmission offers an unparalleled combination of driver control matched to virtually undetectable gearshifts. With control either from steering wheel-mounted paddles or full automatic mode via the JaguarDrive Selector™, the new XK range delivers exhilarating performance.The supercharged V8 engine with 510PS and 625Nm of torque transmits power through an uprated version of the ZF 6HP28, additional clutch plates and an uprated torque converter having been added to the transmission to accommodate the extra power.

The transmission has a fully-adaptive shift system which delivers seamless gearshifts and balances performance and economy at all times. It also continually adapts to suit driving style, which can vary from sporting to more economical. Jaguar Sequential Shift™ suffers no torque interrupt, resulting in a smoother more powerful shift feel, and an almost instantaneous shift from the time the driver touches the shift paddle to the completion of the shift event.

The high levels of torque produced by the new engines make it possible for the torque converter lock-up feature of the transmission to function at low speeds, without slip. This approach provides an additional fuel consumption benefit, contributing to the official combined fuel economy of 23.0mpg (12.3 l/100km) in the Jaguar XKR. The advanced design of the transmission also includes a torsional damper to absorb firing impulses from the engine, further smoothing the driveline. The transmission is designed to be maintenance-free with 'filled-for-life' fluid.

Active Differential Control for optimum grip in Jaguar XKR

Another first for Jaguar is the new Active Differential Control (ADC), the final stage of the supercharged V8 driveline. Designed to give improved traction and dynamic stability, the electronically controlled differential continuously adapts to both the driver's demands and the amount of grip available at each individual wheel.

Operated by an internal electric motor and 'ball-and-ramp' mechanism, the differential contains a multiplate clutch which transmits or 'vectors' torque to the wheel with most grip and therefore maximises the car's traction. The multi-plate clutch assembly is designed to prevent excessive differential slip, but differs fundamentally from a conventional traction control system, which uses the brakes to counteract differential slip, after it has occurred.

New JaguarDrive Selector™ completes the package

For the first time, the new XK range introduces the innovative JaguarDrive Selector™ as its transmission control interface. First seen on the Jaguar XF saloon, the JaguarDrive Selector™ features a rotary shift control which rises into the driver's hand as the car is started, to give intuitive, ergonomically efficient transmission control from a neat, space-efficient interface.

The selector is, in fact, much more than just an unobtrusive yet completely practical solution to selecting an automatic gear mode. It also imbues the car with a strong driver 'handshake' - get into an XK and the start button in front of the JaguarDrive Selector™ pulses red, like a heartbeat; press this button to start the engine and the cast alloy JaguarDrive Selector™ rises into the palm of your hand.

From there, automatic transmission functions are selected simply by turning the control with the fingertips. As an example, Drive to Drive Sport selection is accomplished with a simple push and turn action. Returning from S to D, the rotary control operates with spring-assistance, which eliminates the need to pull the Selector. It couldn't be simpler. And when the engine is stopped, the JaguarDrive Selector™ returns automatically to its Park position.

Safety

As well as the convertible's hidden, automatic roll-over protection, every car in the new XK range features Jaguar's pedestrian deployable bonnet system (not fitted to Federal market cars). In the event of a collision with a pedestrian, the system raises the bonnet by 170mm in just 30 milliseconds to provide a clear space between the surface of the bonnet and the hard points underneath, to reduce the severity of injuries - particularly those to the head - while still allowing the new XK low bonnet line. An energy-absorbing bumper system also helps minimise lower leg injuries to pedestrians.

Jaguar's Emergency Brake Assist is standard on the new XK and Advanced Emergency Brake Assist is fitted to all models with Adaptive Cruise Control (ACC). Advanced Emergency Brake Assist uses the ACC radar to calculate distance from and speed of approach to the vehicle ahead and pre-charges the brake-line pressure to minimise impact speed if a collision is predicted - with an audible warning to the driver.

Every model in the new XK range includes front, side and thorax airbags, incorporating new technology which reduces the load on the occupant's body if the front airbag is deployed. Jaguar's Adaptive Restraint Technology System checks for seat occupation and seatbelt use, seat position, and the direction and severity of any impact, and uses all that information to determine the appropriate level of airbag deployment in any incident. Additionally, Jaguar's Protec front head restraint system can minimise whiplash in the event of a rear impact.

Equipment

The new XK range introduces five new alloy wheel designs, some of them replacing earlier designs, some completely new additional choices. Together, they bring the total number of alloy wheel options on the new XK range to seven.

The standard wheel specification is dependent on market and model, but for most markets begins with Jaguar's 18-inch seven-spoke Venus design on XK models. The new 19-inch 10-'V'-spoke Caravela wheel is now standard on XK Portfolio and optional on XK.

Again, depending on market, the all-new 19-inch 10-fan-spoke Artura design is available in painted or chromed finishes and in conventional or run-flat types, and these Artura wheels are offered as options on XK, XK Portfolio and (in run-flat form) also on XKR. Another all-new wheel, the 19-inch ten-spoke Tamana design, becomes standard equipment on Jaguar XKR for most markets other than the UK (which specifies 20-inch wheels), and is unique to this model.

A new 19-inch mini-spare is introduced as standard equipment for the Jaguar XKR, while the weight and space-saving Instant Mobility System still takes the place of a spare wheel on other models in European markets and where 18-inch wheels are fitted as standard.

Distinctive 20-inch wheels continue as a very sporty option across the new XK range - emphasising the cars' sporting dynamics and assertive, muscular looks. The new designs include two 20-inch wheels: the twin-five-spoke Kalimnos will be standard on the XKR in the UK market, and optional for all XK models in other markets. The twin-seven-spoke R Performance Nevis design is a unique option for the Jaguar XKR, and another addition to the wheel range.

With the recent addition of new options Claret, Spectrum Blue, and Kyanite Blue, the stunning exterior colour range for the new XK, XK Portfolio and XKR is extended to 15; two of which - Salsa and Kyanite Blue - are reserved exclusively for Jaguar XKR.

In true, contemporary Jaguar fashion, a great deal of relevant and intuitive technology is controlled by the clear and elegant seven-inch Touch-screen in the centre console - which is standard on all models. The Touch-screen provides access and control for the Climate Control and Audio systems, for the Satellite Navigation System, for Bluetooth mobile connectivity, and for Jaguar's Portable Audio Interface - which are all standard equipment. The satellite navigation system offers DVD mapping, postcode entry, and a traffic message channel. The Portable Audio Interface offers iPod connectivity, and the connection of other storage devices through a USB port, to the in-car sound system, with full Touch-screen control.

The audio system options for the new XK range include single-slot or multi-disc CD changers and either Jaguar Premium Sound or the ultimate, a high-end Bowers & Wilkins system. The Bowers & Wilkins option is a 525-watt system with Dolby® ProLogic®II Surround Sound, three-channel stereo with unique amplifier, Kevlar mid-range speakers with high output and low distortion, and specially designed aluminium tweeters.

Depending on market, a number of Digital Radio options are available: HD radio is available for North American market cars, SDARS satellite radio for North America and Canada, and Digital Audio Broadcasting (DAB) is offered in selected European markets.

[via Net Car Show]

Spy Report Our U.K. operative has just snapped our first look at the mid-cycle facelift for the Jag XK—in both XK8 and XKR trim. Visual changes consist of new front bumpers with new outer air-inlets below the headlights. Judging from the surface development that appears to differ on the prototypes, the XK8 and XKR variants will get unique styling touches. New tail-lights are also in the works, with a greater percentage of red-lens and clear signs that LEDs will be be employed. The rear bumpers on both prototypes also show signs of a redesign.

When the XK first bowed, it was saddled with a clunky power-retractable antenna; a quick-fix for 2008 saw the antenna integrated into the rear spoiler. These new prototypes show that Jag is finally bringing the XK up-to-date both visually and technologically, with the addition of a proper shark-fin antenna applied to the deck lid.

No serious engine upgrades are expected, but Jaguar will be applying the XF's Jaguar Drive transmission interface to the XK, thus modernizing and streamlining the Jaguar lineup. We expect that the interior changes necessary for this will inspire some visual and material upgrades to the XK's interior.

We expect to see the facelifted XKs to bow officially later this year, although a Geneva debut in the Spring could also be a possibility.

Jaguars are often criticized for looking too much like the current crop of near-identical Aston Martins, but that's not a comparison borne out in person. In pictures, the XKR's shape overwhelms the body's more subtle lines. It's a shape close in proportion and form to cars like the DB9, but up close and on the street, the Jaguar strikes a pose all its own — long and lithe where the DB9 is heavy and purposeful.

It's not a comparison that's borne out inside either. Where the Astons have crystal start/stop buttons and a modern and luxurious swath of bamboo on the dash, the Jag is an awkward combination of nicely stitched leather and cheap plastic parts. I know the Vantage is $20,000 more expensive, but the Jag's interior is about $50,000 cheaper than its $98,000 as-tested-here price tag suggests.

The spokes on the steering wheel — parts you touch — are made from the lowest quality painted plastic. The airbag cover — a part you look at every day — is about five cents more expensive. The door handles are chromed plastic versions of the ones that were used on the '90s Ford Fiesta. The aluminum weave trim inserts are a matter of taste, or the complete lack thereof. Why not just continue the piano black of the center console across the rest of the interior?

You see where I'm going here, but I've saved the worst for last. The touch-screen interface controls most of the vehicle's ancillary functions, but it is surrounded by an inches-thick, sweaty black plastic binnacle, the quality of which would look out of place in a Chevy Cobalt.

Having lived with this car for a week, I just can't figure out where the $98,000 was spent. Sure it looks good and, yes, initial impressions were promising, but without the ability to drive like a sports car or cosset like a luxury car, the Jag's mouth is writing checks its chassis can't cash.

Perhaps the best argument against the XKR is delivered by the sheer competence of vehicles that retail for close to half its price. A Corvette, for example, is also a V8-engined, rear-wheel-drive sports car. But it starts at less than $50,000; is lighter and faster; comes with a manual gearbox; and drives like a sports car. For that price, we'll forgive its cheap interior. The Porsche Cayman costs a little more, but drives better, comes with a premium badge and has an interior that shares no parts with a late '90s Fiesta. For almost $100,000, the XKR should objectively offer something these two cars don't. Make all the arguments you want for the exclusivity its badge brings. It just doesn't deliver the goods.

So the Jaguar XKR is a beautiful car, and a fast one, but it promises too much and delivers far too little. Enthusiastic drivers don't just want a car that feels special; they want one that is special. The word I'm looking for is "underwhelming." Decidedly, woefully, disappointingly underwhelming.

This concludes our review of the Jaguar XKR. Parts One and Two can be found under the Jalopnik Reviews tag in the masthead.

Photography: Grant Ray

Let's flash back quickly to yesterday. Driving the XKR around town, I felt incredibly special. Hold the start button down and you're rewarded with a deep growl as the engine kicks into life. All the cues of a fast, rewarding car are present. When it's not being pushed, the suspension feels firm and controlled; the engine feels powerful and responsive; the gearbox feels smooth and quick to change gear. The problem is, it feels like the XKR has been designed to deliver impressions, rather than actually deliver.

Up here, on the tight, wet roads through the Catskills, what's needed for fast driving is precision, not power; confidence and control, not bounce and squirm. Last year, in similar conditions, an Audi R8 was sheer pleasure, setting an unbelievably fast pace past sheer cliffs, through hairpin curves and down muddy tracks without once feeling overwhelmed. The XKR couldn't be more different.

The suspension that felt so in control yesterday feels out of its element up here, bouncing over bumps and squirming around corners. Carrying speed through mountain bends is a cross-your-fingers-and-hope-for-the-best experience — you can never be quite sure what's going to happen. Even in the fastest of corners there's enough play in the steering that constant adjustment is needed to maintain a constant radius. A slow in, fast out approach would seem to make more sense, but that unpredictable two seconds of wheel spin that felt good in town yesterday feels scary when you're two inches from snow-covered Armco.

The engine still feels incredibly powerful, but the automatic gearbox makes it unpredictable. Leave it in drive and unexpected kickdowns deliver unwanted pulses of power. Flip the J gate over to sport and start shifting gear with the paddles and things get a little better. The XKR never lets you forget that you're manually overriding an automatic gearbox. It'll still shift up at the redline and even though a downshift delivers a nice sounding throttle blip, it results in no meaningful engine braking, leaving you to use the big, soft brake pedal to reach retardation. This stuff does not a supercar make.

Driving down into valleys, the roads open up into long sweepers that run alongside rivers and lakes. Allowing the opportunity for high speeds, the Jag still feels good when it can stretch its legs. But high speeds and gentle curves aren't the XKR's forte either. The weight shifts considerably rearwards under hard acceleration, removing weight and subsequently feel and accuracy from the steering.

The small, narrow windows that delivered an impression of safety and clubhouse luxury yesterday serve only to slow me down today. The A-pillar and mirror block a significant part of the forward view around left-handers. Around uphill right ones, the rearview mirror rears its ugly plastic head, obscuring enough of the view to have you hunching into the steering wheel to see the road ahead.

White with winter, frozen waterfalls falling off cliff faces and streams running fast with melted snow, the Catskill Mountains make a beautiful drive. Slow down, look around you and take time to appreciate the world that sits out past the sloping hood and the XKR begins to make a lot more sense, its outward promise of speed temporarily forgotten.

Part One of the Jaguar XKR review appeared yesterday, Part Three will appear tomorrow.

Photography: Grant Ray

Previously:
2008 Jaguar XKR, Part One

The cabin feels warm and inviting. Befitting the Jag's nation of origin, it rained solidly during my first few days with the car. Peering out of the tiny glass house over the bulging hood at the cold, wet world outside, you feel safe, warm and empowered. A world of cold, wet roads and towering SUVs becomes inferior as you make swift progress through it. The ugly roads and rain-swept buildings gain an aura of glamour when viewed past the chunky, Alcantara-clad A-pillar.

At city speeds, the engine is smooth and instantaneously powerful. Put your foot down and the traction control allows a second or two of spin before hooking up and driving the car forward with real intent. The automatic gearbox is perfect in this urban environment, complementing, rather than detracting from, the impression of luxury and speed. Once the revs start to climb, a valve opens in the exhaust, making it louder. Keep your foot planted and the supercharger whine grows in aural precedence. Combined with the V8 growl, this conveys a sense of vast power and speed. The car dips rearwards slightly with a planted right foot, further accentuating the acceleration.

Fitted with optional 20" wheels, you'd expect the ride to be harsh and fidgety, especially on the rutted, pot-holed, third world streets of New York. Up to a point, however, it's surprisingly posh. Through the steering wheel you can feel the road's texture, but it doesn't find its way through the seat or into the rest of the cabin. Your hands say sports car while the rest of the experience says luxury. This impression lasts right up to the most severe of impacts with the biggest potholes—this is where the Jag's stiff aluminum chassis, big wheels and firm suspension finally give up the luxury game. Driving out of town through a torrential storm, I couldn't see the road — or the lane markings for that matter — and crashed into huge holes with surprising regularity. At one point, I thought I had surely torn off the front suspension. I hadn't, but I did gain a few more gray hairs.

So the XKR aces first impressions. It makes people think you're rich and classy. If you're not careful, it makes you think you are too. It feels fast, it feels luxurious, it feels like a Jaguar. For most people, that's enough to seal the deal. For us, it's not. A Jaguar should be a real sports car, and we have yet to drive it fast.

Part Two of the Jaguar XKR review will appear tomorrow.

Photography: Grant Ray

[The Jalopnik Question of the Day loves its mother. Do you have a Question of the Day? Email suggestions to tips@jalopnik.com with the subject line "QOTD"]

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What's Your Mostest/Leastest Favorite Bumper Sticker?; Nissan Pino Has Young Japanese Women In Its Fluffy Pink Crosshairs; The Jalopnik Question of the Day

If Autocar's reporting pans out, torque meisters will have a diesel Jaguar with which to engage in stump-pulling exercises. The UK mag reports a diesel-powered XK in likely by the car's next facelift, due in 2009. The "XKD" had reportedly been in the offing since the latest XK hit the drawing board, but no existing engine would suffice and the market for luxodiesels wasn't clear. But a new, 3.0-liter turbodiesel producing around 250 hp will be done in 18 months. The XKD will compete with BMW's new 635d, which will go on sale this fall. – Mike Spinelli

Related:
Spy Photos: New Jaguar XF To Get 500 Horsepower, Trailer Hitch [internal]

The boys over at Motor Authority worked a sexy deal with the German Dutch blog Auto G-spot to get some pics of the brand-saving, massively camoed Jaguar XF. And here's a curious detail that lit up our normally dour face. Excellent trailer hitch, Jag! Some of the engineers from Ford's Grace & Pace division rented a cottage and shop in Austria to do some development work on the new models. In addition to the very good looking XF, Jaguar's finest were also sorting out the upcoming 500-ish horsepower XKR GT3 that comes correct with a 5.0-liter supercharged V8. The really fantastic news? There's a good chance that hyper-mill may wind up in the XF. Meaning that the M5 is going to have even more to look over its shoulder for than just a dirty old stonked-out Caddy. – Jonny Lieberman

[Auto Gespot via Motor Authority]

Related:
Spy Photos: Jaguar XKR with JaguarDrive [Internal]

This week's task involved chasing a big black cat in a big black cat, in one of those painfully tenuous story hooks where I took the Jaguar XKR on a futile hunt for the Beast of Bodmin Moor.

There are about three grainy photos, a long distance video of what looks like a housecat and very little else to prove the existence of what is thought to be a family of Pumas living out in the most depressing territory known to man. Even the Royal Air Force failed to find them with night-vision equipment and a cynic might be tempted to believe that one bedraggled cat died many years ago and is being kept alive as a myth to pull in the gullible few.

I was starting to feel the same way about the manufacturer. Even by Ford's standards Jaguar is a black sheep and has lost more than $1 billion a year almost every year since joining the Blue Oval's portfolio. And while Aston Martin is being hawked off to pay the bills, Jaguar as it stands anyway, isn't even worth sticking on eBay.

Who among you, under the age of 40 even thinks about buying a Jag these days? We all have our sights set on a Beemer, a Merc, an Audi, even a Lexus, Yes we all have an E-Type in our dream garage, or an XK120, forgetting that they're hateful little shits that will rip you limb from limb faster than a white tiger at a magic show, but before the new XK, did you really think about a new one? If you did I bet you wear beige pants and eat at the wealthy equivalent of Country Kitchen Buffet.

Jaguar's customers are sitting in a retirement home while a bag goes to the toilet for them. That's where Jaguar's sales have gone, they're waiting for God or have met him already.

Jaguar woken up to the problem far too late and the X-Type was a hamfisted attack on the Yoof market that almost killed the brand altogether.

The XKR, though, is a fantastic bit of kit. It's quick, courtesy of the Supercharged engine, it looks almost good enough to justify those self-congratulatory 'Beautiful' adverts. Next to this beast, the BMW M6 and big power Mercedes look like candidates for Extreme Makeover, the ones that even the plastic surgeons wince at the sight of.

It will go faster than the AMV8, with far more comfort, and put it on a track and it will turn drifting into your new national sport. It's that damned good, and you don't have to be "this age or higher" to take the ride. This is a car that a young, thrusting executive would be proud to own.

The same goes for the upcoming X-CF saloon car, finally a saloon car with the big cat on the bonnet that doesn't come with the unmovable smell of urine and butterscotch candy. It's a cool car and if it drives half as well as it looks then it will be a superstar.

Putting brand in the black might be a bit too much to ask for these two cars, but as a driving force Jaguar is back. – Nick Hall

WCF Test Drive: Jaguar XKR [World Car Fans]

Related:
Car Hack's Notebook: Tomorrow's Classic, Today; Dan Neil on the XKR [internal]

The most recent iteration of Jaguar's legendary XK line has been divisive at the very least. Some call it beautiful. Some cry "Ovoid Taurus" and others "carp." In his review of Jag's uprated GT car, Dan Neil admits to not being sure about the XK at first, but begins to warm to its design, commenting, "Maybe the effect is less aerodynamic than Jungian: This is the shape of a coveted thing slipping through your fingers." And while we argree that the 3/4 view of the car is quite nice, from head on, it still looks like a hip-hop-obsessed lamprey chugged a 40 of pure quinine. – Davey G. Johnson

One sleek cat: Jaguar XKR puts the 'grand' in grand touring [Detroit News]

Related:
Clarkson Pits XKR vs. AMV8 [Internal]

Now that the Hamster is repaired and the Top Gear boys are back to making television, we can dispense with the flipping jet car business and get back to giggling over egregious examples of hoonage — which is pretty much what Clarkson spends his time in the Jaguar XKR doing. He then sics it on its hotter half-sister, the Aston V8 Vantage, in a sans-Richard Dawson episode of Family Feud, usefully pointing out that the new EU booster seat mandate has now largely made 2+2 coupes too cramped in the back for the only people small enough to fit there — children. – Davey G. Johnson

Related:
Holy Jet Car, Hamster — Here's The Exclusive Crash Footage! [Internal]

Jaguar and motorsports have — of late — combined like cats and 220v power lines. Having smothered Jackie Stewart's former F1 team under a deluge of Ford bux earlier in the century, the company's coming back with a new FIA GT3 racer it hopes will reclaim the Jaguar racing heritage. A joint venture with Apex Motorsport, the new XKR GT3 will compete in the FIA GT3 European Championship — a relatively new sports car series, whose entries include the Aston Martin DB9, Corvette Z06, Ferrari F430, Lamborghini Gallardo and Maserati GranSport. It's not a factory team, though Jag is greenlighting Apex's efforts and providing it with XKR models powered by the company's supercharged, 4.2-liter V8. Apex upclocks that powerplant to 475 hp, and inserts a Hewland six-speed sequential gearbox and tri-plate carbon racing clutch in place of the six-speed ZF automatic. Shakedown testing will come next month at Monza, where we'll get final specs. – Mike Spinelli

Related:
Aston to Offer Race-Ready Vantage V8 [internal]

We were talking to a rallying pal of ours last night about Top Gear's attempt to cross the country in under 32 hours, 57 minutes. He laughed and said that they were woefully unprepared. Their Michael Harvey agreed in his post-blast wrap-up, commenting, "[We] went in to this horribly unprepared and kinda put all our faith in the Jag getting us here, which it absolutely would have done had we been less shambolic."

The transcontinental record-breakers of the past have often armed their vehicles with all manner of electronic gadgetry and extra fuel capacity. These guys went into it with a case of Red Bull, some apples and a radar detector. The hilarious thing is that the Brits were trying to hide the radar detector from the police, when, as far as we can tell, they didn't pass through one state where using one was illegal.

That said, congrats boys (and girl), on making it safe and sound with only one set of handcuffs slapped on. It's just too bad you weren't able to at least beat Gurney and Yates' time of 35:54. Still, it's no mean feat to get a car across the country in 36 hours and 34 minutes (Yates once told us that even though $40,000 modern cars may make it around a track faster than a Daytona GTB/4, there are still very few vehicles that can match it for this sort of aberrant behavior). Even if you did stop the clock for "photography" breaks. This transcontinental stuff gets in your blood, doesn't it?

TransAm Non-Stop: Final Leg [Top Gear]

Related:
Top Gear Attempts to Break the Wrong Transcontinental Record [Internal]

Notwithstanding Jaguar's corporate fate, which became cloudy this week amid reports of Ford advisors recommending a sell (with Land Rover) — and others recommending a hold — Jaguar announced MSRPs and options for the 2007 XKR Coupe and Convertible will come in under the $100,000 mark. On location of this year's Pebble Beach Concours d'Elegance (Davey, represent!) the company revealed the coupe will start at $86,500, and the 2007 XKR Convertible at $92,500. Still, add a few options, and your accountant will be singing soprano in seconds flat; check out the list after the jump.

Press Release:

All-new 2007 Jaguar XKR At-A-Glance Highlights

* New supercharged Jaguar XK sports car - the XKR, available as a Coupe or Convertible
* All the attractions and attributes of the XK, but amplified in the 'R' to complement the extra power and performance

* Not available in Canada

* 4.2-liter, supercharged V8 engine developing 420bhp and 413 lb.-ft. (560Nm) of torque
* 0-60mph acceleration in 4.9 seconds and 155mph (electronically limited) top speed
* All-aluminum construction means a lighter, stiffer vehicle, which improves handling and agility
* Uprated springs and dampers, and recalibrated Computer Active Technology Suspension (CATS) system for enhanced ride and handling
* Class-leading six-speed automatic transmission with steering-wheel-mounted shift paddles for ultra-quick gear shifts in milliseconds
* Active Exhaust System to ensure cruising speed refinement, but purposeful V8 roar under hard acceleration
* Subtle XKR exterior styling enhancements include a sportier grille and front bumper design, vented hood, unique aluminum-effect side power vents and new wheel designs
* Enhanced interior includes unique aluminum 'weave' design on the fascia (polished burl walnut is optional at no extra cost) and XKR sports seats
* Intuitive controls and driver-focused technologies are available - including Keyless Entry, Keyless Start, advanced Touchscreen and Active Front Lighting

2007 MSRP PRICING AND STANDARD FEATURES

XK COUPE: $86,500 (includes destination and delivery charges)

XK CONVERTIBLE: $92,500 (includes destination and delivery charges)

KEY STANDARD FEATURES

* Supercharged 4.2-liter, 420bhp AJ-V8 engine
* 19-inch Jupiter-style alloys wheels
* Dynamic Stability Control with Trac DSC traction control system
* Four-channel ABS, Electronic Brakes Force Distribution, and Hydraulic Brake Assist
* Performance brakes with black brake calipers with 'R' logo
* Fully active exhaust
* Adaptive Front Lighting
* 'R' sports seats with added lateral support
* 'R' badging on headrests, tachometer, steering wheel and gear selector

2007 XK Packages and Options

Luxury Package (available on XK): $3,300

* 19-inch Carelia-style wheels
* Soft-grain interior
* Leather-trimmed instrument panel, doors and center console
* 16-way power-adjustable seats
* Heated wood/leather-trimmed steering wheel
* Wood/leather-trimmed gearshift knob

Luxury Package (available on XKR): $2,100

* Soft-grain leather interior
* Leather-trimmed instrument panel
* 16-way power seats with adjustable bolsters

ALUMINUM L uxury Package (special order option on XK): $8,125

* 20-inch Senta-style wheels
* Dimpled aluminum trim
* Soft-grain leather interior
* Leather-trimmed instrument panel
* 16-way power adjustable seats

Premium Sound Package (available across the range): $1,875

* Eight-speaker, 525-watt Alpine Premium Sound System with Dolby II
ProLogic surround sound
* SIRIUS Satellite Radio* (subscription not included)

Advanced Technology Package (available on XK): $2,500

* Adaptive Cruise Control
* Adaptive Front Lighting

Individual options

Radar-based Adaptive Cruise Control (XKR): $2,200
19-inch Carelia-style wheels (XK): $1,200
20-inch Senta-style wheels (across the range): $5,000
20-inch Cremona-style wheels (XKR): $5,000
Poplar veneer finish: No Cost Option
Burl Walnut veneer finish: No Cost Option
Special order non-standard paint, interior trim, convertible top: $1,000

Related:
More on the Jaguar XKR [Internal]

You've already seen the convertible, via embargo-era leakage. Today, Jag officially released the deets on its new, hi-po XKR coupe. The supercharged feline gets 120 horsepower more than its naturally breathing sibling — 420 hp — out of the same 4.2-liter V8. Jag says it'll go from zero to 60 mph in 4.9 seconds (5.0 for the drop top). It also has uprated springs and dampers and the same Jaguar Sequential Shift six-speed clicker as the base model. Expect it to go for between 80,000 and 90,000 quid.

Related:
Jaguar Reveals New XKR Convertible [internal]