Mercedes-Benz S 600 V12 revealed at Detroit Motor Show

The Mercedes-Benz S-Class is unofficially known as the best car in the world… and the firm has now revealed the model that could make that title official – the new V12-engined long-wheelbase S 600 range-topper. Boasting a 530hp 6.0-litre biturbo V12, the new S 600 can accelerate from 0-62mph in just 4.6 seconds… but, thanks to ECO stop/start, it can also average over 25mpg, a 21% improvement on the old car. Just as importantly, it also promises an unparalleled luxury car experience.

Ford GT40 prototype sold for £4.2 million

One of four original Ford GT40 racer prototypes has sold at auction in the US for a staggering $7 million. That's £4.2 million. The Ford GT40 is famous for several things – being the product of Ford’s frustrated attempt to buy Ferrari, becoming an enormously successful Le Mans winning racing car and standing just 40 inches tall.

Audi A7 breaks cover

This is Audi's new A7--the sleek, upmarket liftback previewed by the Sportback concept at the 2009 Detroit auto show. The A7 aims to provide the company with a stylish but practical rival to contemporary four-door luxury cars such as the Jaguar XF and the second-generation Mercedes-Benz CLS. Revealed at a gala presentation in Munich on Monday, the A7 is the second liftback model launched by Audi recently, following the smaller A5.