Nobody is going to argue that the Audi R8 diesel will be saving the earth. It won't. But, like the Tesla Roadster, a diesel version of the awe-inspiring Audi supercar could go a long way towards ...

Audi is bidding adieu to the ... As many as 40 people had to individually green light the wild R8. We're being told it's not a supercar modified to look like a race car, but an actual race car ...

Gone is the stock turbocharged 2.2-liter five-cylinder engine it left the factory with 30 years ago. In its place is the same V10 powertrain from the R8.