At the end of 2005, after five overall victories for the R8, and six to its V8 turbo engine, Audi took on a new challenge by introducing a diesel engined prototype known as the R10 TDI.
A finais de 2005, logo de cinco vitorias absolutas do R8, e seis do seu motor turbo V8, Audi emprendeu un novo reto coa introdución dun motor diésel, un prototipo coñecido como R10 TDI .