Audi R18 TDI in full race livery

Audi succession of sports prototype racers have successfully upheld the company's honour, from the original R8 through the R10 TDI and the R15 TDI that won last year. The latest is the closed-cockpit R18 TDI, which has now undergone its first test sessions in full battle livery at the Paul Ricard and La Sarthe circuits in France.