Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Jaguar XF-R unveiled at Detroit auto show 2009

By Tim Pollard Motor Shows 10 January 2009 22:52 Jaguar's XFR is shown today at the Detroit auto show 2009 – and the XFR at a stroke becomes the fastest saloon the Midlands manufacturer has ever made for the roads. Jag has taken the XF saloon and fettled it with the new direct-injection 5.0-litre V8 petrol engine that supersedes the familiar 4.2, but breathed upon by a new supercharger to crank out a wholesome 503bhp.The R model is extremely rapid, thanks to a classic Ayers Rock torque curve that peaks at 461lb ft from just 2000rpm and doesn't go away until 5000rpm. There's brawn wherever you need it, and the XFR scuttles to 60mph in a scant 4.7sec.

Jaguar XK and XKR Special Edition launched

New Jaguar XK and XKR Special Editions launched Jaguar has decided to give the XK and XKR sales a bit of a boost with the launch of  Special Edition models as coupe and convertible. There’s nothing quite like a Special Edition model to get punters in showrooms, and with the Jaguar XK and XKR perhaps losing a bit of their glow – thanks in part to getting towards the end of their shelf life, and the arrival of the bonkers XKR-S – Jaguar has launched ‘Special Edition’ models of the XK and XKR as both coupe and convertible. The new XK and XKR Special Editions are purely cosmetic – there’s none of the extra power we’ve seen in the XKR-S – but the cosmetic tweaks are appealing.

Video: Porsche GT2 RS attacks GingerMan Raceway

You saw our walk-around and overview of the 2011 Porsche GT2 RS earlier this week. As promised, here's the VBox footage of Autoweek editors blasting around GingerMan Raceway in southwest Michigan doing what the Porsche does best. So far we've brought you track-day action featuring the Chevrolet Corvette Z06 and the Porsche GT2 RS--what's missing?