Audi R8 V12 TDI

The R8 V12 TDI uses the 6.0L V-12 diesel from last years Q7 concept with the award winning R8 sports car. The concept engine shares a cylinder count with the race-winning R10, but it's actually a completely new engine with a 60-degree bank angle instead of the 90 degrees used on the race engine.
It outputs 500 hp and it has 738 lb-ft of torque. While the R8 V12 TDI goes to 62mph in 4.2 seconds and it's limited at 186mph, it also manages to get 23 MPG, which is pretty good, considering the facts.

[more pics]