First sighting of V10-powered Audi supercar?

Few things get us more excited than amateur footage of rumoured supercars. Audi’s gorgeous R8, as driven by a certain Cristiano Ronaldo, currently boasts a V8 engine, but it’s a poorly kept secret that a more powerful, V10 model is on the way.

This clip appears to show one of the V10 prototypes being backed out of a suburban drive in Germany, and then roaring into the distance with a suitably deep growl from the engine - its one of the few cars that looks really good in white. We expect that the V10 R8 will be officially unveiled later this year; it should be available to buy in the UK in the second quarter of 2009.