5. Less Congestion
Higher gas prices mean fewer people driving and more people taking public transit or telecommuting. The most obvious benefit for the real driver is that it opens up the road to those who travel for fun by removing those who merely commute out of necessity. This results in less traffic and, not surprisingly, fewer traffic fatalities, thanks in part to people keeping their Suburbans in the garage. Safer, emptier roads are something all drivers want, but real drivers need.

4. Better Cars
After years of racing to see who could build the largest vehicles, automakers are finally looking to see who can build more efficient vehicles. The technologically advanced Fisker Karma could only exist in the land of expensive gas, and the same is true for the beautiful and powerful Audi R8 diesel. The new Eco Elise not only gets better mileage that a stock Elise, it's also faster. Those are only a couple of examples. There's more on the way, if what Wert had to say at Popular Mechanics a couple months ago is any indication.

3. Better Roads
Owls aren't the only thing in danger of extinction. Cheap energy has meant more driving road-gutting sprawl, which leads to more stoplights and four-lane freeways. Most drivers have had the experience of pulling up to their favorite stretch of asphalt only to find a CVS and a lighted intersection suddenly under construction. Thankfully, the price of commuting is pushing families to move back into the cities and encouraging developers to focus on density with their new projects and leaving the remainder of great driving roads alone and safe from earth movers.

2. Cheaper Insurance
Assuming you become one of those people that takes the train or bus to work, you can adjust your insurance classification to "pleasure driver," which has the dual benefits of sounding awesome and saving you money. Depending upon your current insurance level, you could end up saving 10% to 15% on your premium. That's more money you could put into gas, tires, oil and everything else you need to enjoy the newly emptied roads.

1. Fewer Fatties
According to one economist's doctoral thesis, a $1 increase in the price of gas equates to a 10% decrease in the obesity rate, as people dine out less and walk/bike more. While this has a few boring side effects — fewer health-related deaths and lower health care costs, for example — the benefit to the driver is that your co-pilot is less likely to add sprung weight to your car. We're pretty sure it's the same reason Colin Chapman became a vegan and John DeLorean made sure all his women were coked-out anorexics.

Well, Volkswagen will work with the German government in experimenting with a fleet of 20 Twin Drive Golfs in 2010. Though evidently the Twin Drive just isn't green enough as is, so to further reduce emissions, the electrical energy required to charge the batteries of the experimental fleet will be generated from green resources such as windmills and hydro-electric dams. Of course, there are no plans for US export, or for any production at all at this point. But even though we're more easily excited about speed than with being green, we would totally rock one of these as a daily driver.
[carscoop, MotorAuthority]

Why biodiesel in a racing car?
Christian Bokich: We're racing to show people what's coming in our future cars, and to show that we're leaders in diesel. It has always raced on GTL; it's not from an oil barrel, it's from natural gas using a high-tech conversion. The new twist is the GTL was only the stop-gap to learn how to create synthetic diesel. We know we wanted to do biomass diesel, not based on foodstuffs.

Racing is fun. Racing is exciting. But we're racing for a reason: A to win, and B to bring the technology to customers. Though we don't recommend more than 5% biodiesel in our cars now, we want to say for the future you can use it in one of our new cars with a full warranty, and racing is an easy way to test that technology.

Did you have to make any adjustments to the cars to run the mixed fuel?
We did not. There were no adjustments.

You ran a mix of GTL and BTL, that's what you're trumpeting, but did you run it the whole time?
We were running the fuel mixture the entire race. There was no night-time mixture or day-time mixture.

WIll you continue to use BTL or is this a one-off race, albeit a successful one, with a low mix?
I think eventually you'll see higher mixes. We haven't announced what's going to happen now with the remainder of the US races we have. I assume we will continue. I think if we start using it now it would only make sense to keep using it now.

What's better, ethanol or diesel? You race against the E85-powered Vette; do you want to talk some smack?
Diesel offers the benefits that ethanol might have, but we have tremendous amounts of range. The R10 TDI, if it were not for the restrictions that were placed to put our cars on a level playing field, not only on the size of the gas tank but the rate at which we can refill, we could go lap and lap and lap without refueling.

Sure, we think diesel has an advantage over ethanol. The fact that we're using BTL that just uses garbage is a sign that we're investing in technology that uses a lot of existing resources. From what we know, ethanol does interfere with the human food chain.

This was your first trip to Le Mans, how was it?
I've never seen a race that seems more prestigious. I've been to the Indy 500, to all the ALMS races for two-years running. I guess the length of the race itself is prestigious. The regalia and the tradition that goes with it. We arrived and we went to this parade and they have all these fancy cars. And you look at the caliber of the people walking around. It's just an exciting and enthralling place. It was overwhelming, but it was kind of cool. I don't get very euphoric at times, but it was pretty easy to get euphoric about it.

[Photos: Robin Thompson for Audi of America]

THE PEOPLE WANT BETTER FUEL ECONOMY WITH NO COMPROMISES HERNDON, Va.—Volkswagen of America, Inc. today announced pricing for their eagerly anticipated Jetta TDI sedan and SportWagen starting at $21,990 and $23,590, respectively. Fuel efficiency, performance and convenience all come standard with the 50-state compliant Jetta sedan and SportWagen TDI, which meet the most stringent emissions standards in California and the world. Both models will be available this August.

"Our clean diesel vehicles offer consumers a true value with the fuel efficiency that drivers are looking for while providing power, utility and performance," said Mark Barnes, COO, Volkswagen of America, Inc. "The Jetta TDI's offer a no compromise alternative fuel driving experience."

While the Environmental Protection Agency estimates the Jetta TDI at an economical 29 mpg City and 40 mpg Highway, Volkswagen went a step further to show the true fuel economy of the Jetta TDI. Leading third-party certifier, AMCI, has tested the Jetta TDI and found it performed 24 percent better in real world conditions, achieving 38 mpg in the City and 44 mpg on the Highway.*

The Jetta TDI's come standard with Volkswagen's Prevent and Preserve Safety System, consisting of numerous standard safety features. Jetta TDI's include six airbags, with optional rear side airbags, and like all 2009 model year Volkswagens, Jetta TDI's also feature standard Electronic Stabilization Program (ESP) for added safety.

Also standard for 2009 is Volkswagen's carefree maintenance program, with this program there are no charges for the scheduled maintenance described in the vehicle's maintenance booklet for the length of the New Vehicle Limited Warranty—three years or 36,000 miles, whichever occurs first.

[Source: VW]

Editor-in-Chief

It took a bit of poking and prodding, but we managed to round up four "green" track cars for the Grassroots Motorsports Ultimate Track Car Challenge on Sunday. We have two Jetta TDIs—the Chili Pepper Racing TDI and the Kerma TDI. We'll also have the AC Propulsion eBox, which currently holds the 1/8th mile record with the National Electric Drag Racing Association for a street conversion. And finally, we have the Organic Racing Lotus 7 replica (an E85-powered WCM Ultralite S2K). These four will compete to see who's the fastest, and who's the greenest. Stay tuned for full coverage of Sunday's event at Buttonwillow.

The Audi A3 TDI clubsport quattro

Audi, the inventor of TDI, blazes a trail in the field of engine manufacture. At the 27th annual Lake Wörther Tour being held at the end of May in the Austrian province of Carinthia, the brand behind the four rings is showcasing this technology's potential with a sensational study. The two-liter TDI unit under the bonnet of the Audi A3 TDI clubsport quattro delivers 165 kW (224 hp) and musters up 450 Nm (331.90 lb-ft) of torque - the sort of pulling power normally associated with a sports car. The show car races from 0 to 100 km/h (62.14 mph) in just 6.6 seconds and attains a top speed of 240 km/h (149.13 mph).

The Audi A3 TDI clubsport quattro projects its power with supreme confidence - both acoustically courtesy of its sonorous exhaust and visually with a series of exclusive parts mounted on the body and in the interior. Exterior components such as the large DTM-look rear spoiler and the bolt-on wheel arch extensions give the car a dynamic air, while the racing bucket seats and open gear lever gate in aluminum form the highlights of the interior.

The show car is a true high-tech sports car. The drive power is directed to the 20-inch wheels via a six-speed transmission and the quattro all-wheel-drive system. At the front wheels, stopping power is provided by six-piston brake calipers and ceramic discs. The Audi drive select driving dynamics system allows the driver to vary at will the throttle response characteristic, the exhaust sound, the level of power assistance for the steering, the cut-in thresholds for the ESP stabilization system, as well as the operating mode of the dampers. The dampers deploy Audi magnetic ride technology, enabling them to react to changes in the driving situation with lightning speed.

Audi - the trailblazer of engine manufacture

Audi is the trailblazer of engine manufacture. Since their debut back in 1989, the TDI engines have long since established themselves helped by their powerful, refined and efficient character. The triumphant advance that the diesel-powered Audi R10 TDI racing car has been enjoying for two years now in the Le Mans 24 Hours and in the American Le Mans Series is clear testimony to this technology's tremendous potential.

The engine in the R8 TDI Le Mans study is closely related to the diesel race engine technically speaking - the high-performance sports car is equipped with a six-liter V12 power unit whose output of 368 kW (500 hp) and torque of 1,000 Nm (737.56 lb-ft) are good for a top speed comfortably in excess of 300 km/h (186.41 mph). The R8 TDI can also be seen at the Lake Wörther Tour, as the major annual gathering of horsepower-happy Audi and VW enthusiasts is known. Audi has already transferred the superior power of the TDI engines into its road-going cars: the TT and TT Roadster both feature a mighty two-liter unit generating 125 kW (170 hp) and 350 Nm (258.15 lb-ft) of peak torque, coupled to the quattro all-wheel-drive system. As is plain to see, Audi continues to build on its lead in the technology stakes.

At a glance

Engine

* Four-cylinder TDI with common-rail injection system
* Displacement of 1968 cc, output of 165 kW (224 hp) and torque of 450 Nm (331.90 lb-ft)
* Optimized exhaust system, sonorous soundtrack
* 0 - 100 km/h (62.14 mph) in 6.6 seconds, top speed 240 km/h (149.13 mph)

Power transmission

* High-efficiency six-speed manual transmission with a lightweight casing, open gear lever gate made of aluminum
* quattro all-wheel drive with extremely fast-action multi-plate clutch

Chassis

* Four-link rear suspension for dynamic handling and good comfort
* Power steering with highly efficient electric drive
* Wheels measuring 9 J x 20, tire size 265/30
* Six-piston brake calipers and ceramic discs at the front wheels
* Audi drive select driving dynamics system with Audi magnetic ride adaptive damper control

Body and interior

* Length 4,254 millimeters (167.48 inches), width 1,825 millimeters (71.85 inches), height 1,385 millimeters (54.53 inches)
* Motorsport-look design, large rear spoiler
* Racing bucket seats and extra aluminum components in interior

The concept

A TDI from Audi is more than just another diesel - it is, in fact, a dynamic power unit and a rich source of driving pleasure. At the 27th annual Lake Wörther Tour being held in the Austria province of Carinthia from May 21-25, Audi is demonstrating the potential of TDI technology with a very special concept study: the Audi A3 TDI clubsport quattro is powered by an engine delivering a whole 165 kW (224 hp) from its displacement of two liters. And with a torque of 450 Nm (331.90 lb-ft), it endows the premium compact model with the pulling power of a sports car.

The Audi A3 TDI clubsport quattro qualifies as an uncompromising sports machine in all other technical respects too. A six-speed transmission channels the engine's power to the quattro all-wheel drive. 20-inch wheels keep the drive force glued to the road; behind the wheels at the front can be found brake disks made from carbon-fiber-reinforced ceramic. Using the Audi drive select driving dynamics system the driver is able to adjust the throttle response and exhaust sound characteristics, the steering's power assistance, the ESP control and the damper characteristics as desired.

The dynamic image presented by the scintillating A3 study is rounded off by spectacular body styling and a high-class, sporty interior. Parts such as bolt-on wheel arch extensions and a large rear spoiler lend lasting impact to the exterior's looks; the interior is dominated by the racing bucket seats in the front and the open aluminum gear lever gate.

The design

The Audi A3 TDI clubsport quattro has a distinctly confident air about it. Sensational styling instantly sets the three-door show car apart from the standard production Audi A3. It measures 4,254 millimeters (167.48 inches) millimeters/2.36 inches), but just 1,385 millimeters (54.53 inches) high, - a reduction in height of 36 millimeters (1.42 inches) in spite of the large wheels. The track width measures 1,568 millimeters (61.73 inches) at the front (+ 34 millimeters/1.34 inches) and 1,553 millimeters (61.14 inches) at the rear (+ 46 millimeters/1.81 inches).

The design team has kitted out the Audi A3 TDI clubsport quattro with a whole array of new exterior parts to give it an extremely sharp and dynamic look - almost like a racing car. The paint finish is also a picture of vibrancy: the engine hood, tailgate and roof are Ibis White and the flanks Brilliant Red, while a large white figure "8" is emblazoned across each door in reference to the year 2008. The color scheme is an allusion to the colors of the Austrian national flag.

The single-frame grille has grown slightly in width, which also entailed modifications to the engine hood. The grille's bars - including pronounced vertical sections - have a high-gloss black finish. The bi-xenon headlamp assemblies are embellished by LED daytime running lights and wings. The front bumper incorporates large, square-edged air intakes, together with a blade section that juts a long way forwards and is slightly raised in the centre.

The modified front fenders feature bolt-on wheel arch extensions. The doors and the rear side sections - again with muscular wheel arch paneling - have been given a new, boldly contoured flare at the bottom. This blends together harmoniously with the door sills, which have themselves been restyled. The exterior mirror housings, with their arms that look to have been crafted by the wind, are likewise new. The tinted glass used for the rear windows gives the model yet greater visual presence.

The tail of the Audi A3 TDI clubsport quattro sports a dark grey diffuser. It is a variant on the design of the front blade, and incorporates the two large circular tailpipes of the separate exhaust branches. Modifications have also been carried out to the tail light assemblies. The most striking impression, however, is made by the spoiler atop the rear window that bears a close resemblance to the part featured on the new A4 race car from the German Touring Car Masters (DTM).

Inside the Audi A3 TDI clubsport quattro, the eye is immediately caught by the illuminated door sill trims with their "TDI Power" badging. Awaiting the driver and front passenger are anatomically shaped bucket seats, just like those found in motor racing cars. The rear seats sport the same upholstery design, with special foam padding used to sculpture them into roomy and comfortable individual seats.

The driver takes hold of an elegantly styled steering wheel with a flat-bottomed rim that is reminiscent of the Audi R8 high-performance sports car. The scales of the dials are colored white, the monitor for navigation and entertainment together with its control panel stems from the R8. The jet-style air outlets have multi-way adjustable louvers, and the usual buttons in the center console have given way to classic, sporty toggle switches. The bars underneath the console are covered in leather, the door handles have been milled hollow to save weight. The door linings and floor mats have been newly designed.

The drive train

The high-performance TDI under the bonnet of the Audi A3 TDI clubsport quattro is like nothing that has gone before it. From its displacement of just 1,968 cc, it summons up an output of 165 kW (224 hp). Torque - the true measure of effortless motoring ability - peaks at an exhilarating 450 Nm (331.90 lb-ft), which is on tap from just 1,750 rpm; in other words, the very bottom of the rev range. As for in-gear flexibility, the diesel model leaves its gasoline-powered rivals standing.

The mighty TDI bestows the Audi A3 TDI clubsport quattro - which tips the scales at just 1,475 kilograms (3251.82 lb) - with pulling power befitting of a sports car. The sprint from 0 to 100 km/h (62.14 mph) is over in a fleeting 6.6 seconds and the speedometer needle keeps rising all the way to 240 km/h (149.13 mph).

The four-valve sports engine is smart too; it responds spontaneously to the throttle and pampers the occupants with the low-vibration running of its mechanics. On an acoustic level, however, it proudly proclaims its abilities for all to hear: the exhaust system is a new development, with controllable resonance chambers on both tailpipes to amplify the rich, sonorous sound.

The engineers took as a basis the undersquare engine (bore x stroke = 81.0 x 95.5 millimeters) with an output of either 103 kW (140 hp) or 125 kW (170 hp), depending on the configuration, and added to it an optimized turbocharger. The advanced design of its blades allows it to supply more air; as in the series-production version, the variable geometry of the turbine's blades ensures spontaneous response.

The 2.0 TDI, which is managed by one of the most sophisticated control units currently available on the market, is brimming with high tech. Fuel injection is handled by a common-rail system with piezoelectric injectors and eight-hole nozzles. The high-precision metering of as many as five injections of fuel per power stroke has the effect of audibly reducing the noise level. The system operates at a pressure of 1,800 bar - this results in extremely fine atomization of the fuel which, together with the revised piston geometry, makes the combustion process a highly efficient one.

The engine's intake manifold houses swirl flaps that generate a tumbling action in the inflowing air; electric motors regulate the flaps' position so that this tumbling motion is always perfectly suited to the current load and engine speed. Two balancer shafts in the engine reduce the degree of vibration in the crank drive. The drive unit for the belt that propels the two camshafts has also been reworked with a view to improving the engine's acoustics.

The engine: low on emissions, high on efficiency

In its high-performance 165 kW (224 hp) version, the 2.0 TDI unit is still able to make use of a high proportion of recirculated and sharply cooled exhaust gas to achieve cooler combustion with lower oxygen levels - this brings about a substantial reduction in untreated nitrogen oxide emissions. The four-cylinder power unit already complies with the limits of the Euro 5 emissions standard, which is not due to come into force until September 2010 and whose foremost aim is to cut NOx emissions.

The ultra-efficient two-liter engine attains a power-to-displacement ratio of 83.8 kW (113.8 hp) per liter, and torque-to-displacement ratio of 228.7 Nm (168.68 lb-ft) per liter - figures which comparable gasoline engines are simply unable to match.

The Audi A3 TDI clubsport quattro has been designed strictly in accordance with the principle of maximum efficiency. Power is transferred by a compact, transverse-mounted six-speed transmission whose casing is made from lightweight magnesium. The short-throw gear lever can be moved swiftly and precisely through a classic open gate made of aluminum. The transmission ratios have been adjusted and the components reinforced to make allowance for the TDI engine's extremely high performance.

The engine's power is transferred to the road with virtually zero losses thanks to the quattro all-wheel drive. The system's key component is a multi-plate clutch which is positioned at the rear, thereby further optimizing the weight distribution. Under normal driving conditions, the electronically controlled and hydraulically operated clutch directs the engine's drive power to the front wheels; whenever necessary, however, an infinitely adjustable proportion of the propulsive force can be diverted rearwards.

When altering the power split, the plates inside the clutch are subjected to high oil pressure, pushing them together - a procedure which is completed in a matter of milliseconds thanks to a newly designed pressure reservoir for the pump. The quattro drive constitutes the perfect power transmission system for the mighty two-door model, significantly enhancing traction, handling characteristics, stability and straight-line running, whatever the weather.

The chassis

The Audi A3 TDI clubsport quattro comes equipped with a sports suspension that is more than capable of handling the formidable power. The front suspension - a classic McPherson layout - is pivoted on a light, high-strength aluminum subframe. A rack-and-pinion steering system with a direct ratio produces a sensation of close contact with the road. Power assistance is generated by an electromechanical drive unit for high efficiency, and its level decreases as the speed increases.

The rear suspension comprises four links per wheel which fulfill all manner of tasks. The trailing links absorb the propulsive and braking forces. As an aid to ride comfort, their configuration is relatively soft. The connections to the three transverse links, on the other hand, are rigid in order to direct transverse forces into the body with absolute precision. In this instance, the coil springs and shock absorbers are also kept separate from one another. The set-up is decidedly firm, while the body has been lowered by 36 millimeters (1.42 inches) compared to the standard production version. The Audi A3 TDI clubsport quattro rides on impressive ten-spoke wheels measuring 9 J x 20, which are in turn shod with size 265/30 ZR 20 tires.

Whereas the brakes at the rear wheels were borrowed from the series-production A3, their counterparts on the front would not be out of place on a supercar: six-piston calipers exert a vice-like grip on brake discs measuring 356 millimeters (14.02 inches) in diameter. The discs themselves are made of a material which has been of tremendous value to the aerospace industry, consisting of high-strength carbon fibers embedded in hard silicon carbide. They have a lightweight construction, can withstand extreme levels of strain, are corrosion-free and have a service life in the region of 300,000 km (approx. 186,400 miles).

Motoring à la carte with Audi drive select

The Audi A3 TDI clubsport quattro boasts yet another highlight in the form of the Audi drive select driving dynamics system. This system has control over a number of technical components that mould the motoring experience. By simply pushing a button, the driver can determine at will whether these components should work in the comfort mode, the dynamic mode or even the "Individual" mode that allows partial manual programming of the way in which they interact.

In the show car, Audi drive select influences the engine's throttle response, the sound from the exhaust system, the power assistance for the steering, the cut-in thresholds for the ESP stabilization system, as well as the damper characteristics. This is where the adaptive damping system Audi magnetic ride comes in: a magneto-rheological fluid circulating in the shock absorber pistons alters its viscosity - and, by consequence, the damping characteristics - in an instant when a voltage is applied.

The interplay between all these cutting-edge technologies makes the Audi A3 TDI clubsport quattro a thrilling road machine that is tremendously fun to drive. It darts into bends with exceptional spontaneity, and corners with stolid stability and at high speed, guided with unfailing precision by the sensitive steering. Its handling limits are extremely high, with just a minimal amount of understeer kicking in as the limits are approached. A sense of effortless, assured controllability is a key virtue of the A3 study - just as it is on all Audi models.

TDI engines - the superior drive force

Power, refinement and efficiency - ever since they first made their debut in 1989, the TDI engines from Audi have been synonymous with a sophisticated and smart form of sportiness, blazing a trail for the rest of the motor industry to follow. The triumphant advance that the diesel-engined Audi R10 TDI racing car has been enjoying for two years now on race tracks around the world has delivered a powerful demonstration of its potential.

The R10 TDI has been causing a sensation since spring 2006, with its twelve-cylinder diesel powerplant ushering in a new era in the world of motor racing. The 5.5-litre TDI develops in excess of 1,100 Nm (881.32 lb-ft) - a torque figure that positively eclipses its gasoline-powered competitors. Its output of 650 hp translates into a top speed of around 330 km/h (205.05 mph).

One of the fortes of the R10 TDI is its low fuel consumption. And fewer fuel stops means a higher average speed - the car's high efficiency was one of the key factors in its two successive victories at the Le Mans 24 Hours. Frank Biela (Germany), Emanuele Pirro (Italy) and Marco Werner (Germany) won in 2006 and 2007 in emphatic style. It is a similar story in the American Le Mans Series, where the diesel race car bearing the four Audi rings has racked up a string of successes, easily securing the constructors' title in the large LMP 1 category in both years.

For the first time ever, superior TDI power from the race track can now be experienced in a series-production sports car - both the Audi TT Coupé 2.0 TDI quattro and the Audi TT Roadster 2.0 TDI quattro feature a diesel engine. The two-liter four-cylinder unit delivers dynamic thrust, with a power output of 125 kW (170 hp) and 350 Nm (258.15 lb-ft) of torque. Despite this, the TDI engine in the Coupé burns just 5.3 liters of fuel per 100 km (44.38 mpg) on average - a benchmark value in the sports car segment.

Also on show at the Lake Wörther Tour is the Audi R8 TDI Le Mans, whose drive train technology is closely related to that of the R 10 TDI. The high-performance sports car is driven by a six-liter V12, whose 368 kW (500 hp) of output and 1,000 Nm (737.56 lb-ft) of torque propel the world's most powerful series-production TDI model to a top speed far in excess of 300 km/h (186.41 mph).

The equipment, specifications, and prices stated herein refer to the model line offered for sale in Germany. Subject to change without notice; errors and omissions excepted.

"Yeah, go slow over this cable tray cause the nose is so low, but in the tunnel why don't you punch it and see what it can do"—those were the orders of the cars' keeper gave. Though styling is not necessarily the car's strong point, its simplicity and performance are respectable. The car starts with a tubular space frame and adds a 78 kW direct drive, a three-phase brushless A/C motor powered by 10 maintenance-free lithium ion battery packs. Those batteries will charge by way of 120V power in 8-10 hours and run for 100 miles on a charge. All of that is shrouded under a completely carbon-fiber body, which encases leather-clad seating. The whole shebang weighs in at 2300 lbs. and considering electric motors make max torque at zero RPM, this thing scoots pretty well. 0-60 will pass in about 5 seconds, and the car has a top speed around 120 mph.

Now that the formalities are out of the way, we're ready to go out on a limb and say this is a better concept car than Die-Hardigree-with-a-Vengence's obnoxious Audi. Lets look at it objectively. The Audi's glorious V12 turbo diesel has been neutered and runs at a mere 250 HP; the electric car runs wide open with full power off the line. The Audi is constructed of soft, malleable aluminum; the electric car is fabricated of a race-car style tube frame and delicious crunchy carbon fiber. The seats are firm but nonadjustable, a clever strategy to simplify operation and cut a substantial amount of waeight compared to the leather ensconced, powered Audi helms. Whereas weight like that forces the audi to add baloney like power steering and power brakes, the little pop top is all direct connect. the steering is heavy as are the brakes, but that just makes you feel like Juan Fangio in his '57 win at Monaco. Sure it's simple and unrefined, but that means it's also simple and unrefined. The utter lack of pretension and the delightfully direct nature of the car was refreshing. Topping it off, we folded in behind the mob squad surrounding the Audi while in traffic, and we were the ones who got the natives asking about it. Clearly, the electric emerges triumphant. [Hybrid Technologies]

To make sure we didn't kill ourselves or, more importantly, the car, Audi provided three black Q7's driven by ex-cops for escort. I suddenly knew what it was like to be a Russian oligarch. Audi's best prototype protection feature is Uwe Haller, the car's affable project manager and my navigator. The car is his baby and he managed to point out every manhole cover on the road. This being New York it was a common refrain.

This prototype features the 6.0 V12 TDI, which produces a pavement destroying 500 horsepower and 738 lb-ft of torque. How does it drive? For the purpose of self-preservation, this particular version was limited to half the torque and horsepower so that we couldn't have too much fun with it.
Nevertheless, the six-speed gear box worked, the engine revved up and the brakes clamped down hard. Maybe a little too hard. At one point Uwe winced and asked "did you hear that?" Did I hear what? The brakes were made a noise that made him very nervous. Was I about to get the Audi R8 fire experience?

Thankfully, that didn't happen. I waited as we turned back onto 11th avenue slowed down to get some daylight between myself and the lead Q7. There was a good 80 yards in front of us and I shifted into second and let that oil burner roar. How fast did I get? I'm not sure, but fast enough to make Uwe tense up (which makes me think 28 mph).

Though this wasn't a full force test drive experience, there was one feature of the car that works at any speed: style. We got lots of looks (helped by the escort) and people did the best they could to get pictures of me in the car. When people yelled I told them I was George Clooney. I don't think they bought it.

Credit goes to Audi for letting us take their precious concept car out for a spin on the less-than-stellar NYC streets. It either indicates Audi's abundance of trust or serious judgment lapses.

Outstanding Torque for the Top Class Audi R8 TDI Le Mans

Audi is presenting a revolution in the top class - the first 12-cylinder diesel engine in a high-performance roadgoing sports car. The V12 TDI with a displacement of six liters powers a concept car based on the Audi R8. This unit generates a huge 500 hp and 1,000 Newton-meters (737.56 lb-ft) of torque. Audi is writing a new chapter in diesel technology with this power unit. Equipped with the expertise that Audi has built up through its motor sport activities, the R8 TDI Le Mans in Brilliant Red embodies superb road handling, pioneering technology and fascinating design.

The V12 TDI is closely related to the engine in the Audi R10, the two-time Le Mans winner - so it catapults the Audi R8 into supercar terrain concerning performance too. It sprints from zero to 100 km/h (62.14 mph) in just 4.2 seconds and its top speed is well over 300 km/h (186.41 mph). The peak torque, reached at only 1,750 rpm, paves the way for effortless acceleration that is unrivaled even at this level.

The new V12 TDI belongs to Audi's family of V engines but has the ideal included angle for this engine type of 60 degrees between cylinder banks. Its highlights include the new chain drive layout that includes the two newly developed high-pressure pumps for the common rail injection system.

Its sound is as thrilling as you'd expect in a sports car of this caliber. For all the subtle smoothness that typifies this design principle, the twelve-cylinder unit is full-bodied and equipped with energetic overtones that make no secret of its performance potential.

The Genes of the Winner

Thanks to their high performance and pulling power, all Audi TDI engines are ultra-dynamic sources of power. The brand has often enough demonstrated its sporty character in its production cars, especially the six- and eight-cylinder 3.0 TDI and 4.2 TDI. Audi has also been writing a new chapter in its success story on the racetrack since 2006. The diesel engine in the R10 sports prototype won its very first endurance race at Sebring, Florida, when it was pitted against an entire field of gasoline-engined challengers. But its most crucial victories were surely in 2006 and 2007 in the 24 Hours of Le Mans, when it simply outclassed the international elite.

The V12 TDI race engine in the R10 produces over 650 hp from a displacement of 5.5 liters, giving it the potential for a top speed as high as 330 km/h (205.05 mph) depending on the gear ratios. Its power and sturdiness immediately impressed both fans and experts, who were impressed by its restrained noise level. Unusual for a race engine, this powerful Audi diesel makes barely more than a whisper.

Long traditions of motor racing and production technology complement each other at Audi. The FSI engine of the R10's predecessor, the R8, captured five wins at Le Mans with a direct gasoline injection system. Audi is also looking to maximize the advantage by using the race-tested FSI principle in its production models. The latest examples of this are the V8 with high-revving concept in the RS 4 and the production version of the Audi R8.

The Drivetrain

The roadgoing version of the new V12 TDI is built at the Györ plant, in Hungary. And the R8 TDI Le Mans still has a massive 500 hp on tap. In developing the six-liter engine, it was a clear priority to integrate it into the current family of Audi V engines, of which many thousands of versions with 6, 8 and 10 cylinders have already been built - both gasoline and TDI.

Audi's engineers were in an ideal position to use their experience building the racing engine to develop the road version. Like the other power units in this range, the distance between cylinder bore axes on the V12 TDI is 90 mm (3.54 in.). Yet its included angle is 60 degrees, not 90 degrees. This means no free inertial forces or mass moments of inertia can occur with the V12. The results are refined in every respect.

The 83.0 mm (3.27 in.) bore and 91.4 mm (3.60 in.) stroke produce a total displacement of 5,934 cc - just like the 3.0 TDI. At only 684 mm (26.93 in.) long, this large diesel engine is very compact and just 166 mm (6.54 in.) longer than the V8 TDI. This compact length is key to accommodating the V12 in the mid-engined Audi R8.

The V12 TDI crankcase is made from gray cast iron with vermicular graphite - a high-tech material referred to as GJV-450 that is already used on the V6 and V8 TDI engines. GJV-450, made by a patented casting process, is about 40 percent more rigid and 100 percent more fatigue-resistant than gray cast iron. This enabled the developers to make its walls thinner, cutting its weight by around 15 percent compared with conventional gray cast iron.

The two cylinder heads are each made from three main elements. These are a base section made from a high-strength aluminum alloy incorporating the intake and exhaust ports, an oil-bearing upper section, and a reinforcing ladder frame supporting the two camshafts.

The valves are actuated by low-friction roller cam followers; the compression ratio is 16.0:1. Map-controlled swirl variation of the combustion air has been adopted from the V6 and V8 TDI engines. This produces permanently optimized swirl concerning both emissions and high performance.

Ultramodern Injection Technology

As is the case in the Audi V engines, the no-maintenance chain drive is mounted at the back of the engine, where it occupies little space. Its layout has changed on the new V12 TDI. The camshafts' sprocket engages in an intermediate gear via which two Simplex chains drive the camshafts. Two more chains drive the oil pump and the two high-pressure pumps actuate the common rail injection system.

The two new dual-piston high-pressure pumps form part of the common rail injection system supplied by specialty manufacturer Bosch. The two pumps build up a pressure of up to 2,000 bar in the rails. The piezo injectors with eight-hole nozzles have also been fundamentally revised.

The high pressure distributes the mixture optimally throughout the combustion chamber. The result is that the ignition process is faster, more homogeneous and more acoustically refined. The more efficient combustion process also increases power output, cuts consumption and reduces pollutant emissions.

The current generation of so-called inline injectors makes effective use of the piezo effect: piezo crystals expand in a fraction of a millisecond when an electrical voltage is applied. The number of injection processes per operating cycle can be varied across a wide range thanks to piezo technology - reaching as many as five fuel injection operations in the case of the V12 TDI.

As well as the main injection, pilot and post injections are possible. Pilot injections tone down the acoustic harshness of the combustion process. Retarded post injections are designed specifically to increase the temperature of the exhaust gas, promoting regeneration of the two standard particulate filters.

The two turbochargers are located on the outside of the engine's V, each of them supplying one bank of cylinders. Thanks to their variable turbine geometry, the full flow of exhaust gas always passes through the turbine, so the chargers respond slickly - even at low engine speeds - and operate very efficiently.

The two turbochargers, which generate up to 2.6 bar of boost pressure, play a crucial role in producing the huge torque of 1,000 Nm (737.56 lb-ft) that the V12 TDI maintains from 1,750 rpm to 3,000 rpm. In developing 368 kW (500 hp), the diesel achieves a specific output of 62.0 kW (84.3 hp) per liter displacement.

Two large intercoolers reduce the temperature of the compressed air. The V12 has a twin-pipe exhaust system with two particulate filters. The intake system is similar in structure with one air cleaner per cylinder bank, with an airflow meter behind it. Two control units, sharing the workload in a master/slave principle, manage events in the engine.

The Audi R8 TDI Le Mans already fulfills the Euro 6 emissions standard that is likely to take effect in 2014 and calls for sharply reduced nitrogen oxides. By also designing in ultra-precise fuel metering by the common rail system, Audi's engineers have made full use of current clean diesel technology.

The heart of the system is a special catalytic converter downstream of the oxidizing catalyst and the particulate filter. The second component in the system is an additional tank containing an aqueous urea solution. Small quantities of the solution, known as "AdBlue," are injected into the exhaust system. The hot exhaust gases break the solution down to form ammonia that splits the nitric oxides into nitrogen and water. The system remains effective for the entire service life of the vehicle.

The dynamic character of a sports car depends not just on its performance and torque; the transmission ratios have to be right too. In keeping with the character of a high-performance sports car with unbeatable torque potential, the transmission in the R8 TDI Le Mans has six manually operated gears.

The manual transmission is very compact in design. Together with the small-diameter double-plate clutch, this means it can be installed low down. The manual transmission has very short shift travel and utterly precise guiding of the shifter into the open gear lever gate. It is made from polished aluminum, has an agreeable feel and exquisite sports car looks.

Such a high-performance Audi also has quattro permanent all-wheel drive. In the case of this mid-engine sports car, power is distributed variably between the front and rear wheels from a starting ratio of 40:60 to optimize the handling.

The Design

The R8 TDI Le Mans with Brilliant Red bodywork looks even wider and more resolute than the core model. It shows its potential through its muscular proportions, accentuated wheel arches and even larger air apertures. The rhombus-pattern cover on the air inlets and outlets is the hallmark of Audi's sporty top models and a familiar feature of the current RS generation.

Typical of the side view of the R8 is the sideblade. Much wider in the bottom third, it visually accentuates the engine's position as well as acting as an enlarged air deflector.

The continuous aluminum spoiler lip that connects the front and rear diffusers with side air baffles below the enlarged sills also pays tribute to this version's highly developed dynamic talents.

And yet the R8 is unmistakable for its powerful, elegant basic proportions. The selective but always precise use of lines is another typical Audi characteristic, as is the curved arc of the roof. One new aspect is the glass roof of the passenger compartment with two large transparent sections. These, together with the glazed engine compartment behind, create a radically new formal element. The unmistakable NACA duct in the middle of the roof is a functional detail that is normally reserved for racing cars. Its ingenious shape accelerates the air drawn in here for the two cylinder banks of the V12 TDI engine.

The V12 TDI is displayed as the beating heart of this sports car, like a work of art inside a large showcase. Its look, underscored by the air deflectors located beneath the restyled rear glass lid, differs clearly from its production counterpart. The engine can even be seen after dark, when white light-emitting diodes illuminate the engine compartment - as on the production R8 version. This "showroom" can additionally be fully lined in genuine carbon fiber, for a particularly exclusive look.

The continuous line running from the front apron across the wheel arches and flanks to the tail end, then back down the other side, is one of the latest design hallmarks of the Audi brand. This "loop" naturally encompasses the air apertures, the headlights and the taillights.

Unmistakable Face by Day and Night

The passion expressed through the elaborate design of the lights is another typical Audi trait. Nor is anyone likely to overlook this Audi sports car from behind: the LED taillights have a three-dimensional look that can't be missed.

But the absolute highlight is the all-LED headlights of the study vehicle. With their lenses and reflectors, not only do these innovative light sources have a ground-breaking appearance, they also have an enormous functional advantage: LED light, with its color temperature of 6,000 Kelvin, resembles daylight much more closely than xenon or even halogen light. Better light means the driver will have much less fatigue when driving at night.

Ergonomic and Elegant

The interior's design is as sporty and exclusive as the exterior: the characteristic element here is the monoposto - an expansive arc running around the steering wheel and instruments, connecting the driver to the car. The interior consequently picks up on the dynamism of the R8 TDI Le Mans and gives it tactile expression in a form that is accessible the moment you climb in.

The three-spoke sport steering wheel of course remains the focal point of the car's controls. With a diameter of 365 mm (14.37 in.), it is both sportily compact and ergonomic in shape. The steering wheel rim has a flat lower edge. This is a further aspect of the auto racing feel in the Audi R8 TDI Le Mans, but one that also brings major functional benefits, facilitating entry and exit for the driver. The steering wheel is covered in fine Valcona leather, with a diecast magnesium core providing strength.

The start/stop button for the engine and the Drive Select switch with the Dynamic/ Sport/Race settings are arranged on the steering wheel. The latter controls the engine and transmission electronics as well as the magnetic ride dampeners in each of three different modes.

In Race mode, the instrument lighting changes from white to red. The navigation system shows a combined display with lap timer and navigation information for the racetrack being driven. Or supplementary information such as centrifugal force and boost pressure can be called up.

Concentrating on the essentials was the priority in the ergonomic arrangement of all Audi R8 versions. The most important consideration - particularly for high-speed driving - is short reach distances for all controls, to keep the time that the driver has only one hand on the steering wheel to a bare minimum. In typical Audi style the monitor is well within the field of view, and the elements of the MMI operating system are located directly below it.

Compared with the production version, the R8 TDI Le Mans's interior has much larger aluminum applications, especially around the center console. The many carbon fiber elements give the interior a decidedly sporty feel.

The R8's exceptional everyday practicality for a sports car is maintained in the study vehicle's spaciousness, even though the longer engine takes up more room. The two occupants have the generous wheelbase of 2.65 meters (8.69 ft.) to thank for the interior comfort. This means the driver and passenger will always be able to find their perfect seated position, whatever their build. The view is also very good for a mid-engine vehicle. Narrow A-posts optimize the field of view to the front and sides.

Light but Highly Rigid Body

The body of a sports car needs to be particularly light and rigid. Low weight permits superior road performance, and rigidity is the crucial starting point for an agile driving feel allied to high precision. The Audi Space Frame body, made from aluminum, provides the ideal basis for this.

Audi has more expertise than any other manufacturer worldwide in the design and production of vehicles based on aluminum technology, and has channeled its accumulated know-how into this area.

The entire bodyshell of the study car weighs just 210 kilograms (462.97 lbs.). In ASF technology, the body's supporting structure is made of extruded aluminum sections and die-castings. Aluminum panels are incorporated into this skeleton to form a positive connection and perform a load-bearing role. Each individual component of the ASF space frame is optimized for its specific task by the use of widely differing shapes and cross-sections, combining maximum stability with minimal weight. It adds up to a car that's particularly light and rigid, an outcome that can be felt in the R8's ultra-precise driving feel.

The aerodynamics experts at Audi have done their work so thoroughly on the study car that, as an added benefit of its elegant shape, the body actually generates downforce - unlike many other sports cars. This aids directional stability at high speeds. It is achieved partly by means of an extending rear spoiler that is much larger than on the production version, and also thanks to the fully clad diffuser underbody.

Two large-format diffuser apertures in the rear bumper demonstrate just how much aerodynamics dictate the shape of the study vehicle. The tailpipes of the exhaust system are located in pairs on the right and left above the diffuser apertures. The add-on, automatically extended rear spoiler also interacts with the air as it flows around the car. The extra downforce it provides increases the efficiency of the air intake generated by the aerodynamic design of the underbody and diffusers. At low speeds, the rear spoiler returns to its initial position.

Chassis

The precision chassis of the Audi R8 TDI Le Mans remains supremely in control of the sporty performance, but is capable of assuring relaxed driving pleasure over long distances too. The sports car is spontaneous and agile at obeying steering movements, always demonstrating exceptionally good driving safety. The suspension, with double wishbones at both the front and rear, is optimized for a neutral self-steering response and maximum ease of control.

The study car, too, has the innovative dampening technology known as Audi magnetic ride. This adapts the chassis characteristic to the profile of the road and the driver's style within milliseconds.

Ceramic Brakes with Extreme Reserves

A generously dimensioned brake system supplies the necessary braking force. It applies a total of 24 pistons to the four brake disks, combining excellent performance with minimal weight and high durability. The disks are made from carbon fiber reinforced ceramic, a material that has repeatedly proven its worth in the aviation and aerospace sectors. The basis is very hard, frictionally resistant silicon carbide, with its diamond-like crystalline structure. Embedded in it are high-strength carbon fibers that absorb the stresses occurring in the material. The intricate geometry of cooling ducts in the ventilated disks prevents extremely high temperatures. The ceramic brake disk ring is bolted by 10 spring-loaded elements to a stainless steel central element that acts as the connection with the wheel's hub.

The ceramic brakes are identifiable at a glance by the special red, six-piston monobloc aluminum calipers and the fixed calipers at the rear. The advantages of the ceramic brakes include a further reduction in weight of around 20 kilograms (44.09 lbs.), which in this case improves the handling characteristics and comfort. The high abrasion resistance permits an operating life of up to 300,000 kilometers (186,411 miles). Their key strength, however, is their ability to withstand very high loads. Even on the racetrack, for example, the ceramic brakes always maintain their full reserve performance.

Vorsprung durch Technik: Diesel Milestones from Audi

Audi has reached another milestone in diesel technology with the new V12 TDI. The brand with the four rings has been performing vital pioneering work in this area for the past three decades. The first TDI auto engine made its debut in 1989. The 2.5 liter five-cylinder power unit developed 88 kW (120 hp) and 261 Nm, catapulting diesel driving into an entirely new dimension.

This was followed in 1994 by a development version generating 103 kW (140 hp). This engine was optionally available with all-wheel drive - the first TDI quattro model. A new four-cylinder diesel appeared at that time in the Audi 100 and Audi 80, the 1.9 TDI developing 66 kW (90 hp) that has now become legendary.

At the end of 1995 the output of this four-cylinder unit rose to 85 kW (115 hp) with the advent of pump-injector fuel injection. Slightly more than one year later, at the start of 1997, the world's first 2.5 V6 TDI appeared.

With four valves per cylinder, it achieved an output of 110 kW (150 hp), and its top speed of 220 km/h (136.70 mph) made the Audi A8 the fastest production diesel on the market. The first eight-cylinder TDI followed in 1999 - a V8 engine with a 3.3 liter capacity. The 3.0 TDI made its debut early in 2004 as the first V6 diesel with inline piezo injectors in the common rail system.

The 4.2 liter TDI launched in the A8 in 2005 is currently at the vanguard of Audi's TDI range. One in three A8 buyers in Germany chose this V8 engine. The next logical step was to make the V8 TDI available in the Audi Q7 in summer 2007.

With extremely clean, ultra-low emission technology, Audi is continuing its tradition of leadership in diesel engine technology. In 1989 it was the Ingolstadt brand that developed direct injection technology. Since then the diesel engine has become around 30 percent more efficient.

The Euro 4 European emission standard has reduced particulate emissions for cars by 93 percent. Long before it came into force, Audi had models on the market that met this standard, even without a particulate filter. And the brand will be offering the world's cleanest diesel engines in production vehicles in 2008. The TDI engines with the ultra-low emission system will be the first in the world to meet the forthcoming EU 6 emission standard as well as the toughest known statutory limits that apply in the U.S.

The equipment and specifications stated herein refer to the model line offered for sale in Germany. Errors and omissions excepted.

The VW is capable of driving either totally on electric or diesel power (or obviously a combination of both). A stop/start system shuts down the engine when sitting in city traffic. And to further charge the batteries there is a regenerative braking system. [Auto Bild via German Car Blog]

Audi is presenting a very special concept car at the Geneva Motor Show: The Audi Q7 coastline combines the breathtaking power of a twelve-cylinder TDI with the elegant style of an exclusive yacht. A large part of the high-performance SUV's exterior and interior is bathed in a trendy white. Under the hood resides the world's strongest diesel engine in a series-production vehicle - the six-liter V12 capable of delivering 368 kW (500 hp) of power.

The Audi Q7 coastline comes in Inuit, a special white that creates a pearl effect reminiscent of the glistening luminance of the polar region. Audi, the leading brand in automotive design, initiated a popular trend with this color years ago - studies such as the white Shooting Brake Concept displayed at the Geneva Motor Show 2006 have become style-setters.

In contrast to the production version of the Q7 V12 TDI, the casing for the exterior mirrors on the Audi Q7 coastline is white as well; the single-frame radiator grill and the side air intake slots come in dark High Gloss Steel. The Audi Q7 coastline has the same body modifications as the Audi Q7 V12 TDI, with widened wheel arches and striking front and back bumpers that immediately catch the eye.

The equally stylish and trendy interior is dominated by alabaster white, a color popular on luxury yachts. Also in luminous white are the carpet, embroidered floor mats made of fine wool, pillar trim, roof lining, seat upholstery made of plush velvet and Valcona leather, seatbelts, steering wheel, the front of the cockpit and the door trim. The majority of the switches and controls as well as the instrument panel with cowl are likewise in this trendy color from Audi.

In the interior, additional accents are set by aluminum elements on components such as the air inlet nozzles and door handles. Further trendy touches include nut brown piping on the seats as well as fine brown piping on the instrument panel and the door. Parts of the armrest, the gearshift lever knob and the inner door sill trims are made of American walnut veneer in which thin strips made of dark smoked oak wood have been embedded as a further maritime reference. The same combination can also be found on the floor of the luggage compartment, which contains two integrated folding boxes. The wood is waxed, not varnished. As a result, the pores in the wood remain open, giving it a uniquely charming feel and silky glow.

Concentrated power and high efficiency: 368 kW (500 hp) and 1,000 Nm (757.56 lb-ft)

Under the hood of the Audi Q7 coastline concept car resides a concentrated powerhouse: The V12 TDI is writing a whole new chapter in the annals of diesel technology. Drawing on 5,934 cm3 of displacement, the six-liter engine delivers 368 kW (500 hp) of power and an impressive 1,000 Nm (757.56 lb-ft) of torque between 1,750 and 3,000 rpm. As a result, the vehicle performs like a world-class sportscar - sprinting from zero to 100 km/h (62.14 mph) in just 5.5 seconds with an electronically limited top speed of 250 km/h (155.34 mph). On average, the world's only 12-cylinder diesel engine in a passenger car uses just 11.9 liters of fuel per 100 km (19.77 mpg) - a much better figure than comparable gasoline engines from competitors.

The unique diesel power of the Audi Q7 with V12 TDI engine is not the only factor to render it the ultimate high-performance SUV. Equally sporty in nature are the vehicle's six-speed tiptronic and quattro drive as well as running gear with adaptive air suspension. Behind the large wheels are ceramic brake disks. A DVD navigation system, a Bang & Olufsen Advanced Sound System and leather seats with electric heating and adjustment switches are symptomatic of the luxurious standards in the Audi Q7 coastline.

The New Audi Q7 V12 TDI quattro: The Ultimate High-Performance SUV

Audi is taking TDI technology to a whole new level with the Audi Q7 V12 TDI quattro, the most powerful diesel-powered passenger vehicle in its class. The V12 engine under the hood generates 368 kW (500 hp) of power and 1,000 Nm (757.56 lb-ft) of torque from six liters of displacement, enabling the big SUV to perform like a sportscar. The new Audi Q7 V12 TDI quattro represents a combination of superior power and efficient fuel consumption, an Audi hallmark. With its sporty chassis, modified body and exclusive equipment, the Audi Q7 V12 TDI quattro is the consummate high-performance SUV. quattro GmbH, a wholly owned Audi subsidiary, is responsible for production and development of the vehicle. Series production of the Audi Q7 V12 TDI will begin this year.

Audi, the inventor of TDI technology, is penning a new chapter in the history of diesel engines with the Audi Q7 V12 TDI quattro. The world's first V12 diesel engine in a series-production vehicle moves this big, high-performance SUV with supreme confidence and composure. On demand, the six-liter engine catapults the Audi Q7 from zero to 100 km/h (62.14 mph) in 5.5 seconds like a top-class sportscar. Speed is electronically capped at 250 km/h (155.34 mph).

The 12-cylinder diesel engine is no less impressive when it comes to fuel consumption. On average, it requires just 11.9 liters of fuel per 100 km (19.77 mpg), a surprisingly good figure in light of the strength of the engine. The six-liter TDI uses significantly less fuel than any competing gasoline engine in the high-performance SUV sector; thanks to efficient combustion and the complex exhaust emission control system, the Audi Q7 V12 TDI quattro already complies with future emissions standards.

Totally refined, high-tech engine

The V12 TDI captivates its drivers with sheer inexhaustible power and highly cultivated operation - the subtle engine sound takes on a voluminous, strong note when the throttle is open. The six-liter unit is a member of the modern family of Audi V engines, all of which have center-to-center spacing of 90 millimeters (3.54 inches) between cylinders. Instead of the usual 90 degrees, however, its cylinder angle measures 60 degrees. This method of construction is ideal for the V12 as it prohibits any undesirable free inertial forces and moments of inertia.

Another factor contributing to the vehicle's smooth running characteristics is the high rigidity of the crankcase. Made of cast vermicular graphite, it is approximately 15 percent lighter than conventional gray iron. The six-liter unit is extremely compact at just 684 millimeters (26.93 inches) in length. The crankshaft is held in place by a rigid main bearing bracket. The V12 TDI's engine capacity of 5,934 cc is derived from a bore measurement of 83.0 millimeters (3.27 inches) and a stroke of 91.4 millimeters (3.60 inches), just as in the 3.0 TDI.

The aluminum cylinder heads consist of three elements: the lower section where the intake and escape channels are integrated, the upper section which guides the flow of oil and a reinforced ladder frame containing the two camshafts driven by two simplex chains on the back of the engine. The valves are actuated by low-friction roller cam followers. Map-controlled flaps in the intake channels cause the induced air to swirl. This improves combustion, thus reducing emissions and enhancing performance.

High pressure: 2,000 bar in the common rail system

The common rail injection system, with high-pressure pumps driven by chains, can create pressure of up to 2,000 bar. The high pressure level permits intensive mixture formation of the fuel in the combustion chamber, thereby facilitating especially smooth, acoustically satisfying combustion. Shifting very rapidly and precisely, the eight-hole injectors working on the piezo principle can deliver up to five injections per combustion cycle.

Two turbochargers are positioned on the exterior of the V engine, each supplied with a cylinder bank. Thanks to their adjustable guide vane geometry, they respond quickly even at low engine speeds and reach high levels of efficiency, applying a relative maximum boost pressure of 1.6 bar. Two large charged air coolers reduce the temperature of the compressed air, paving the way for the high output of 500 hp.

Outstanding performance paired with exceptional efficiency

The six-liter TDI unit is further impressive proof of the technological leadership embodied in Audi's "Vorsprung durch Technik" slogan. Back in 1989, the brand with the four rings put the TDI principle into series production and has been continually advancing it ever since at the forefront of the field. The most powerful diesel in its class generates an extremely high specific torque of 169 Nm (124.64 lb-ft) per liter of capacity; 1,000 Nm (757.56 lb-ft) is available at a range of 1,750 to 3,250 rpm. Specific power output is 62.0 kW (84.3 hp) - equivalent to that of a sportscar.

The new V12 TDI in the Audi Q7 is closely related to the engine that twice powered the Audi R10 TDI racing car to overall victory in the Le Mans 24 Hours - a 5.5-liter V12 that delivers approximately 480 kW (over 650 hp).

The Audi Q7 V12 TDI quattro's powerful engine torque flows through a rapidly and gently shifting six-speed tiptronic that was specially designed for the six-liter diesel engine's immense torque. The driver can shift the gears of the automatic transmission either with the selector lever or manually with the standard chromed shift paddles on the three-spoke steering wheel.

The quattro drive distributes the power to the front and back wheels in a 40:60 ratio - giving the vehicle a sporty, rear-focused driving style that guarantees maximum agility and driving enjoyment. When needed, the inter-axle differential transfers most of the power to the axle with better traction. Great care has also been devoted to reinforcing all key components in the quattro driveline.

High tech from Audi: The aluminum chassis

The chassis of the Audi Q7 V12 TDI quattro is a marvel of high-tech construction. Elaborate double wishbones guide the front and rear wheels; the axle components are made primarily of aluminum. Thanks to the extreme precision and directness of the servotronic steering, the driver remains in close contact with the road. This is where the handling characteristics, driving safety and comfort of the high-performance SUV set new standards. With maximum ground clearance of 205 millimeters (8.07 inches), the Audi Q7 V12 TDI quattro also proves itself easily capable of handling the demands of rough terrain.

The adaptive air suspension works with sporty new tuning. In combination with electronically controlled shock absorbers incorporating dynamic roll stabilization, the air suspension can be adjusted in three zones ranging from extremely comfortable to highly dynamic. The driver can also adjust ground clearance in five stages via this system and lower the tail end by 71 millimeters (2.80 inches) for comfortable loading.

Standard carbon-fiber ceramic brakes

The ultimate high-performance SUV from Audi takes to the road on sporty 10-spoke wheels of 20 inches in diameter. Alternatively, the wheels are also available in a 20-spoke design or as 21-inch variants in three different designs. Behind the large wheels is a powerful 20-inch brake system. Made of ceramic reinforced with carbon fiber, the internally ventilated disks are notable for their low weight, robust performance and minimum wear. The front disks are gripped by eight-piston brake calipers, while the rear brakes function with four pistons each. The calipers are titanium gray and the front ones bear the "Audi ceramic" logo.

The visual styling of the Audi Q7 V12 TDI quattro gives it an unmistakable look. Daytime running lights consisting of twelve white LEDs per headlight announce the vehicle's presence even at a distance. They are located on the upper edge of the air intake slots, replacing the turn signals that were moved to the bi-xenon headlights. Further honing the vehicle's profile is a chromed grid in the single-frame radiator grill and a shiny underbody protector made of stainless steel. The newly designed bumper groups the side air intake slots into large units.

When viewed from the side, both the 20-inch wheels and the matt aluminum caps on the exterior mirrors catch the eye. The wheel arches have been widened a total of 26 millimeters (1.02 inches) at the front and 30 millimeters (1.18 inches) at the rear; the lower edges of the doors flaunt striking new moldings. The windows are framed by matt aluminum cover strips, the roof rails sport the same look. The taillights are set in a dark-colored background, while the newly designed bumper incorporates two large, oval exhaust tailpipes. At the rear, the underbody protector is also made from stainless steel. A metallic or pearl effect finish comes standard.

Sophisticated: Highlights on board the Audi Q7 V12 TDI

In the interior of the most powerful Audi Q7, passengers will find shiny door sill trim with aluminum inserts and velours carpet. Carbon covers and the aluminum-look selector lever give the center tunnel a high-tech ambience, exclusive wood trim is available as an option. The buttons of the MMI operating system, which has proven a superior concept in numerous independent tests, gleam in silver, the air vents in aluminum, the pedals and footrest in stainless steel. On the speedometer, the range extends up to 310 km/h (192.63 mph).

Verano leather covers the electrically adjustable sport seats, the deluxe center armrest and the armrests in the doors are upholstered with leather as well. The front and rear seats can be heated; a special lighting package softly illuminates the interior.

Also included in the luxurious standard specification are the leather package, leather multi-function sports steering wheel, black roof lining, folding exterior mirrors, DVD navigation system, Bose Surround Sound system with CD changer, Bluetooth mobile phone preparation, alarm system and tire pressure monitoring system. The tailgate opens and closes electronically. Partially overlapping the D-pillars, it gives the vehicle a brawny rear body.

There are four optional high-tech assistance systems for the Audi Q7 V12 TDI quattro: The adaptive cruise control system, Audi lane assist and Audi side assist aid the driver in maintaining the proper distance to the vehicle ahead, staying in lane and changing lane, while Audi parking system advanced incorporates a camera for a clear view behind the vehicle.

The optional Audi music interface offers a convenient iPod interface. Available on request, the B&O Advanced Sound System creates an unparalleled acoustic experience. An even more comfortable interior can be achieved with the advanced leather package that includes, among other things, exclusive leather covering of the instrument panel and center console.

The large glass roof open sky system is available to crown the spacious interior - optionally with four, five, six or seven variable seats - as is a rail system for the cargo area of up to 2,035 liters in size.

Presales of the Audi Q7 V12 TDI will begin in the second half of 2008. The most powerful diesel vehicle in its class is the exclusive top-of-the-line model in the Q7 range.

The equipment, data and prices stated here refer to the model range offered for sale in Germany. Subject to amendment; errors and omissions excepted.

Audi TT Roadster 2.0 TDI quattro

Powerful performance with maximum efficiency

Ingolstadt - Audi is once again setting standards, this time with the new
Audi TT and its TDI engine—a model that combines pure sportiness and
powerful performance with sensational efficiency. The Audi TT 2.0 TDI
Coupe quattro and Audi TT Roadster 2.0 TDI quattro are the first series-
production sports cars to feature diesel engines. It's a compelling union:
The two-liter engine generates dynamic propulsion with 125 kW (170 hp)
and 350 Nm (258.15 lb-ft) of torque, yet the TT Coupe and TT Roadster
consume an average of only 5.3 liters and 5.5 liters of fuel per 100 km
(44.38 mpg and 42.77 mpg) respectively—unparalleled in the sports car
segment.

Audi is setting the pace with this synthesis of excellent dynamism and low fuel
consumption, as it has done for many years: Since debuting in 1989 the TDI
engines from the brand with the four rings have been paving the way for the
world's most successful efficiency technology and acting as trendsetters for the
entire automobile industry. Today, these powerful, refined and highly fuel-
efficient engines represent a modern, smart take on sportiness. The run of
victories achieved by the Audi R10 TDI diesel race car at the Le Mans 24
Hours and in the American Le Mans Series are impressive evidence of the
tremendous potential of this technology.

The dynamic diesel engines from Audi exert an exciting impact not just in
racing but also in series-production models—and now indeed in a sports car.
The TT Coupe quattro with the 2.0 TDI sprints from zero to 100 km/h
(62.14 mph) in 7.5 seconds and achieves a top speed of 226 km/h
(140.43 mph). The Audi TT Roadster, likewise equipped with quattro
permanent all-wheel drive, requires only an extra tenth of a second for the
standard sprint, and continues up to a top speed of 223 km/h (138.57 mph).
Both versions serve as outstanding examples of the success of the Audi
efficiency strategy, thanks to their fuel efficiency ratings of 5.5 liters per 100 km
(42.77 mpg), a figure that corresponds to CO2 emissions of only 145 grams/km.

Powerful, refined and efficient: The 2.0 TDI

The new four-cylinder TDI engine (engine displacement = 1,968 cc) represents
a fresh take on the all-round compelling qualities of the TDI concept. Designers
of the dual-camshaft, two-liter model looked to its predecessor—the most-
produced diesel engine in the world—and expanded upon its major strengths:
driving pleasure, efficiency and refinement.

The new common rail injection system is equipped with highly modern piezo
injectors, whose eight-hole injection nozzles can perform up to five distinct
injection sequences per cycle. This fine degree of modulation creates a modest
pressure increase in the combustion chambers, resulting in a significantly
reduced noise level. The system pressure of 1,800 bar allows fuel to form a fine
dispersion, enabling precise, highly efficient combustion.

The turbocharger is also part of a new generation and operates with adjustable
vanes that allow torque to build up rapidly. The positions of swirl flaps on the
intake manifold are controlled by electric motors in order to adapt the flow of air
to the current load and engine speed. The geometry of the engine's pistons has
been modified, and the acoustics of the camshaft drive belt have been
overhauled. Just as they did in the preceding model, two balancing shafts
reduce the vibrations arising in the crankshaft drive.

The cumulative result of this progress is a high maximum engine speed of
5,000 rpm and, most importantly, improved thermodynamics in the combustion
chambers. What this means is that the engine can run on up to 60 percent
recycled exhaust that has been thoroughly cooled by the radiator. This results
in a drastic reduction in untreated NOx emissions, with the 2.0 TDI already
meeting the threshold values of the upcoming Euro 5 standard.

Dynamic road performance

The 2.0 TDI in the Audi TT Coupe and the Audi TT Roadster delivers 125 kW
(170 hp) at 4,200 rpm and sends a full 350 Nm (258.15 lb-ft) of torque to the
crankshaft at engine speeds between 1,750 and 2,500 rpm. Operating quietly
and generating little in the way of vibration, this model delivers a hefty amount
of power at the lowest rpm levels and is highly responsive to input from the gas
pedal. Its supreme power development lends this engine its own unique,
fascinating character—that of a muscular, smart sports engine.

The Audi TT Coupe 2.0 TDI quattro easily leaves the gasoline-powered
competition behind when accelerating from a standstill. It sprints from zero to
100 km/h (62.14 mph) in just 7.5 seconds and never looks back until it reaches
226 km/h (140.43 mph). The TT Roadster accelerates to 100 km/h (62.14 mph)
in 7.7 seconds and keeps going up to 223 km/h (138.57 mph).

These models—the world's first diesel sports cars—consume an average of
only 5.3 liters and 5.5 liters of fuel per 100 km (44.38 mpg and 42.77 mpg)
respectively, which corresponds to CO2 emissions of a mere 140 g/km and
145 g/km. In so doing, they are setting a benchmark that represents a veritable
quantum leap in the sports car segment. With the TDI engine in the TT series,
Audi once again establishes its leading role on the diesel market. The brand
with the four rings is advancing progress and starting at the top.

In keeping with the theme of sporty performance, Audi has combined its two
diesel-engine sports cars with highly effective manual six-speed transmissions
whose short lever travel allows the driver to shift quickly, easily and precisely.
The housings for these transmissions are made of lightweight, high-tech
magnesium materials. Relatively long final transmission ratios have been
employed to bring the drivetrain in line with the character of the TDI engine.

In light of their high torque values, Audi is equipping both of its new TT models
with quattro permanent all-wheel drive. The heart of this system is an
electronically controlled, hydraulically activated multi-plate clutch, which is
located in the rear of the vehicle for improved weight distribution. This clutch
generally distributes up to 85 percent of the engine power to the front axle and
15 percent to the rear axle; in extreme situations it can divert up to 100 percent
of the power to either axle.

The overall concept: An exercise in uncompromised sportiness

Consistent efforts to reduce vehicle weight are also part of the efficiency
strategy pursued by the brand with the four rings. Both sports cars are very
lightweight: the 2 + 2-seater TT Coupe weighs only about 1,370 kilograms
(3020.33 lbs) when empty, while the two-seater TT Roadster with soft top
weighs roughly 1,415 kilograms (3119.54 lbs). Underlying these low weights is
an innovative hybrid body construction developed by Audi. Front components
are made of aluminum and utilize Space Frame technology; rear components
are made of steel. This solution guarantees that the frame is as rigid as
possible and optimizes load distribution between the axles.

The Audi TT Coupe and TT Roadster are dynamic, emotion-packed sports
cars. As was the case with preceding models, these cars are impressive for
their powerful design, whose dynamic flow continues on into the interior. The
cockpit contains multiple nods to the circle motif, and the sports steering wheel
with its flat-bottomed rim fits the driver's hand like a glove. The sport seats are
deep-set, providing a sporty seated position and firm lateral support. The backs
of both rear seats fold down in the TT Coupe, making the trunk space grow
from 290 to 700 cubic liters (10.24 - 24.72 cubic ft). The Roadster (250 liters,
8.83 cubic ft) comes with a practical load-through hatch upon request.

The sports suspension likewise offers extraordinarily dynamic features. The
front suspension is pivoted on an aluminum subframe and has a wide track
measuring 1,572 millimeters (61.89 inches).

A highly precise rack-and-pinion steering system with a direct steering ratio
provides an intimate link between the driver and the road. Power steering with
servo assist, which decreases as speed increases, is generated by an
electromechanical drive that is even more efficient than a hydraulic pump.

The coil springs and shock absorbers in the four-link rear axle are situated in
separate areas. The links are also finely differentiated: The layout of the trailing
links, which absorb the propulsive and braking forces, is relatively soft to
promote a comfortable ride. The connections to the three transverse links per
wheel, on the other hand, are rigid in order to direct transverse forces into the
body with precision.

The Audi TT Coupe 2.0 TDI quattro and Audi TT Roadster 2.0 TDI quattro roll
on 16-inch, cast aluminum wheels fitted with 255/55 R16 tires. Behind the
wheels are large disk brakes with pads that develop large coefficients of
friction. The ESP stabilization program supports the neutral to slight
understeering feel of the TT—the finishing touch on an overall portrait of
exciting dynamics, exhilarating driving pleasure and stability you can count on.

Audi magnetic ride, a high-tech shock-absorber system available as an option,
is an adaptive system that resolves the traditional conflict of interests between
comfort and handling. A magneto-rheological fluid circulating in the shock
absorbers changes the direction of the magnetic particles within milliseconds
when electricity is applied; this alters the overall characteristics of the fluid and,
in turn, modifies the damping characteristic. The driver can choose between
"Normal" and "Sport" programs by flipping a switch.

Equipment makes a statement of refined style

Standard equipment for both of the new TT models reflects the sporty character
and refined style of the series. Faux aluminum accents add a shine to gray
inlays and various other components in the interior. The sports steering wheel
comes with a Nappa leather cover. The climate control system (standard for the
TT Coupe) regulates heating and ventilation in response to the level of sunlight.

The driver information system and chorus audio system round out the standard
equipment.

A wide array of high-tech equipment is available as options, including a highly
modern generation of audio devices, electrically adjustable front seats, the
adaptive light dynamic cornering light system and two navigation systems with
a user interface based on the Audi MMI concept—a cut above the competition.

Stop! Stop the video right now. I know it's tempting to run it, but we need to tell you exactly what we did first, by the numbers, so you can fully grasp the dramatic results. On the way to and from the Chicago Auto Show—overlooking the comedic jackassery Ray provided—our mission was to see how high we could push the mileage on these cars while driving them in the manner of a your average skinflint consumer. We hacked nothing off the cars to reduce weight, and we added no special taping or streamlining to enhance the aerodynamics. In fact, we really didn't do nuthin' to enhance the mileage capabilities of these rides. As for go juice, the newly de rigeur low-sulfer diesel fuel, as sanctioned by the EPA, was used in all tests. Same stuff you get when you pull up to the pump.

The 2007 Honda Civic 2.2 i-CTDi was tested under what we considered a "normal use" situation, one occupant (myself), with a weekend suitcase and a computer bag. The 2007 Audi Q7 4.2 TDI was tested with myself as the driver and the same cargo setup, but with the addition of our esteemed videographer, Mr. Mark Arnold, and his gear. Again, we recognize we didn't subject these vehicles to precisely the same conditions, but to conditions we consider the average load for each.

The route to Chicago we chose testing the Civic was notably unexciting. We set aside a roughly 105 mile path between the easternmost convenience plaza after the I-69, Toll Road 80/90 interchange, and the Portage convenience plaza. For reasons of personal incompetence, the eastbound return trip occurred between the same Portage convenience plaza and the first northbound I-69 exit after the the 80/90 to I-69 interchange. The only techniques in play where a judicious use of the gas pedal, coasting (for the manual-transmissioned Civic), and drafting behind semis, which was done at a safe but useful two-to-three car lengths. Jalopnik and Gawker Media in no way endorse tailgating semis, so copy this experiment at your own risk.

Now, restart the video.
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Yes, we know, 72.4 mpg is batshit cazy, but settle down, 'cause you haven't heard the Q7 numbers. Would you believe that a power plant capable of 550 lb.ft. of torque and a 6.4s 0-62 mph time, lugging around 5100 lbs and two svelte bloggers, returned 33.2 mpg? What was that about not handling the truth? Below are the conditions and calculations:

We are aware the gallons of fuel on the video for the Civic doesn't match with the calculation above, but we gave it a second squeeze and the final result was what you see. We have the goddamn receipts, skeptics. Soooo, the upshot? Here we have two stock vehicles you can't get in the US, delivering what everybody in their right mind would call impossible mileage, with little effort under less than ideal conditions. What does that mean to us? Well, it means all that bellyaching from automakers about unachievable CAFE targets and the less competitive, unsafe vehicles that would come from high targets is total, unadulterated bull-pucky. The solution to this pressing mileage-target legislation is an absolute no-brainer: Drop a diesel in everybody's lap and call it a day. 35 mpg from a passenger car should be child's play, if done right. This test only confirms—and frankly stokes—our burning desire for good, fun-to-drive, economical diesels on American roads. So where are they? They're elsewhere in the world. But here in the land of freedom and opportunity, the righteous and patriotic boosters of decent mileage numbers are forced to make do with runty gas-burners and do-gooder hybrids that don't exactly reward on the performance front. The times, they gotta change, and there's no reason they can't change like, um, right now.

Video production and voice over credit to Mark Arnold