Leaked: Audi to show TDI R8 in Detroit

When Audi announced last month that it would be bringing a "world first" and a "stunning concept car" to the 2008 Detroit Auto Show, rumors starting flying about possible versions of the R8 that could make an appearance. It was first thought that a convertible version of the R8 sports car would bow, then there was speculation about a naturally-aspirated V10 variation of the car. As it turns out, neither guess was correct.

Auto Motor und Sport broke Audi's embargo and has announced that the German automaker will bring a V12 TDI turbo-diesel version of the R8 to Detroit. No official word on output, but in the Q7 SUV, the V12 TDI engine produces 500 horsepower and 738 lb-ft of torque.

Earlier reports suggested that Audi would equip the R8 with a diesel engine for the 2009 model year, although Audi's TDI V8 was assumed to be the leading candidate.