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Jaguar XKR-S GT (2013) first official pictures

This is the new top dog of the Jaguar XK family: the XKR-S GT. Built to celebrate 25 years of Jaguar ‘R’ models, the road-legal GT carries a host of track-focused modifications: there’s carbon aerodynamic aids, chassis tweaks, and the promise of a sub-7min 40sec Nurburgring lap time. A regular XKR-S manages 7min 50sec around the 'Ring in comparison.

Porsche Panamera S E-Hybrid does 62mpg in the hands of motoring journalists

The Porsche Panamera S E-Hybrid – a Panamera with a plug-in hybrid powertrain – arrives last month, along with a 2013 facelift for the Panamera range , complete with claims from Porsche that it could do 91mpg. That was never going to happen in the real world, but Porsche has followed up its official economy figures with a degree of proof that the Panamera E-Hybrid can actually achieve very impressive economy numbers in the real world, and in the hands of motoring journalists – a group not renowned for their light touch on the throttle. At a press event in Hockenheim, Porsche let car journalists loose on the Panamera E-Hybrid for a total of 42 drives over a total distance of 750 miles and returned an average of 62mpg.

New AutoWeek.com article-commenting system arrives

We're always looking for ways to improve autoweek.com and to make the site's features user-friendly for readers who want to take part in the discussion. On June 8, AutoWeek turned off the previous comments system and replaced it with a new one that's more in line with popular demand. You're now able to log in with any of four accounts before leaving a comment: Facebook, Yahoo, Hotmail (Windows Live) or AOL.