The new Audi R18 TDI topped the times in the first session of the Le Mans Test Day.
Romain Dumas ended the first four-hour period on a 3m27.900s lap, which was just over half a second quicker than teammate Benoit Treluyer. The three Audis blocked out the top three positions, with the first Peugeot 908 HDi on a 3m30.516s in the hands of Anthony Davidson.
The best gasoline-powered LMP1 was the Pescarolo Team entry. Christophe Tinseau's time of 3m37.640s put him just over a second ahead of Neel Jani in the best of the Rebellion Racing Lola-Toyota coupes.
The two new Aston Martin AMR-Ones both ran into problems. Darren Turner set the best time for the British manufacturer on a 3m51.568s.
The British Greaves team's Zytek was fastest in LMP2 with Tom Kimber-Smith driving. Allan Simonsen was quickest in GTE aboard the Farnbacher Ferrari 458 Italia.