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The Audi R15 TDI is a Le Mans Prototyperacing car constructed by the Germancar manufacturerAudi.
It is the successor to the Audi R10 TDI. Like its predecessor, the R15 TDI uses a diesel engine, although the R15's V10 engine is physically smaller than the R10's V12. The car was tested for the first time in December 2008 before it's official unveiling and competition debut at the 2009 12 Hours of Sebring race, March 21, 2009. Three R15 TDIs will be participating in the 24 Hours of Le Mans in June 2009, under the control of Joest Racing.
Audi will not defend their American Le Mans Series or Le Mans Series titles with the R15 TDI.
The R15 made its competition debut at the 2009 12 Hours of Sebring in March 2009 and will follow this event at the 24 Hours of Le Mans in June. The R15 got off to a perfect start by winning the 12 Hours of Sebring, setting a new race record in the process.