Here is another first from the luxury car maker, Audi. The German brand is said to release, if ever, the first diesel powered supercar. The much anticipated diesel-run sports ride is set to be unveiled on the North American International Auto Show in Detroit. The German brand’s latest venture will feature a design concept called R8 V12 TDi. The car will feature a slight modification from the brand’s famous V8 engine. The 500 bhp diesel-power supercar will be a twelve cylinder version o ...