With a suspected 5.0-liter supercharged V8 making around 500 HP, the 2009 Jaguar XF-R has no trouble smoking its tires. The black cat crossed the path of spectators at this weekend's Goodwood Festival Of Speed, where Jaguar head of vehicle development Mike Cross power-slid the car up the hill. Nothing better than a bit …

KGP, the quickest-snapping spy photographers this side of Jim Dunne (he doesn't wait to focus) just caught the best shots yet of the up-powered 2010 Jaguar XF-R as it rolled through the city streets somewhere in the UK. Check out those hood vents, that big and aggressive front air dam and the grille's new strainer-like …

If these prototypes running around jolly old England are what we and spy photographers think they are — it would appear those test mules we saw in September were right — there's a Jaguar XFR on the way as a high-po follow-up to the new XF sedan. There doesn't appear to be a lot of visual differences between the…