Audi has just unveiled their latest R8 concept especially designed for the Le Mans endurance race. Of course the 2008 Geneva Motor Show has been the host for this red beast, which features a 6.0L V12 engine that produces a whopping 500hp and a torque of 737 lb-ft. There isn’t much difference from the V8 version, but the 0 - 62mph has dropped to 4.2 seconds and the top speed increased at