Audi R10 Winner Le Mans 2006 The Audi R10 TDI, usually abbreviated to R10, is a racing car from the German car manufacturer Audi. It is designed and constructed for sports car racing in the Le Mans Prototype LMP1 class of the 24 Hours of Le Mans, and other similar endurance races. The car was unveiled 13 December 2005 at 12:00 CET, and went on to win both its maiden race at the 2006 12 Hours of Sebring in March, and the June 2006 24 Hours of Le Mans. It was the first diesel powered car to win either of those events. This is the most ambitious and the most expensive project ever undertaken by Audi Sport; the Audi R10 TDI project costs Audi $15 million a year.