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Jaguar XFR-S arrives ahead of LA debut

The Jaguar XFR-S – Jaguar’s most powerful saloon car to date – has leaked out ahead of its debut tonight at the Los Angeles Auto Show. We’re hoping that Jaguar has managed to bestow extra power on the very appealing XFR without wrecking the stuff that makes Jaguar saloons so appealing – the dynamic/ride balance – which, if they have, will make the XFR-S a more appealing bonkers sports saloon than the German offerings. The promise is all there with a new butch front end, a more aggressive body kit, chunks of carbon fibre, a huge rear wing for extra downforce, a new diffuser at the back, stiffer springs, a new rear subframe with stiffer bushes, a tweaked active diff and a tweak of the stability control for more fun.

NHTSA probing coolant leak in Porsche 911?

In another embarrassing failure to understand what they're supposed to be regulating, the NHTSA has announced that they are investigating a “coolant leak” in Porsche 911s that were built with the GT1 engine block between 2001 and 2007. Maybe when they said coolant, they were talking about the oil that circulates in a 911 to keep the engine cool? Next thing you know, they'll be checking out fuel pumps on the Tesla Model S!

Top 5 most important cars at the 2013 Frankfurt motor show

The five most important memorable cars in attendance at the world’s biggest motor show Nothing is as controversial as irritating your core enthusiasts, and the Audi Sport Quattro concept risks doing just that. Its name and styling riff off one of the most iconic cars in Audi’s back catalogue – and in WRC history – yet the new yellow version unveiled at the 2013 Frankfurt motor show has abandoned the five-cylinder engine, manual gearbox, and respectable kerbweight of the 2010 Quattro concept. In its place, we’ve an RS7-based coupe with the power of a Lamborghini Aventador (691bhp), twice the claimed economy of a Golf GTD (113mpg), but only because of a twin-turbo V8 mated to a hefty hybrid powertrain, and that means this new Sport Quattro weighs as much as a Bugatti Veyron Super Sport (1845kg).