Considered by Porsche to be its flagship 911, the Turbo has become a byword for impassive and extraordinary speed. But there is more to it than that. Not least class-leading real-world usability.

Watch the Audi RS4 take on the Porsche 911 Turbo 997 in a thrilling quarter-mile drag race! Which powerhouse will dominate ...

A rather strange thing has happened to the 997 Turbo: it has been slightly eclipsed ... but all of this can be ordered direct from Porsche. The DMS changes are all under the engine cover, where ...