AudiR15

Qualifying for the 24 Hours of Le Mans is getting quite predictable, with the big question being which of the Peugeot 908s will come out on top. After three timed sessions over two days, the No. 3 Peugeot of Pedro Lamy, Sebastien Bourdais and Simon Pagenaud came was quickest as the four French diesels filled the first two rows on the grid. Right behind them are the three factory Audi R15+ TDIs and then the two Aston Martin-Lolas.

2010 Audi R15 plus - click above to enlarge

Testing for the 24 Hours of Le Mans doesn't begin until mid-June, but that doesn't mean that Audi isn't already hard at work bettering the chances of their diesel-powered R15 TDI racer.

Thanks to a belated rule change for the LMP1 class designed to hamper the dominance of diesel-powered vehicles, Le Mans rulemakers have mandated smaller-diameter air restrictors and curbed supercharger pressure in an effort to level the playing field. According to Audi, those alterations have made the German automaker prioritize aerodynamics and downforce even more than normal.

Over the past weekend, while the Joest Racing crew was working away preparing the two Audi R15 TDIs for the extra-Petit Le Mans, reserve driver Mike Rockenfeller and a camera crew were out and about shooting a series of videos. Audi has now posted more than two dozen videos on its YouTube page that include driver and crew interviews, tours of the garage, pits and a tour of Road Atlanta. There's plenty of up-close action as everyone gets ready for what proved to be a rain shortened race.

With the American Le Mans Series returning to Road Atlanta this weekend for its flagship event, the Petit Le Mans, Audi has returned to take on the French. Peugeot, of course, won this year's 24 Hours of Le Mans after a multi-year battle with the diesel-powered Audis. So far, in the first three open practice sessions on Thursday, Peugeot's diesels continued to have a speed advantage over the Audi entries, with Frank Montagny setting the fastest time of the week so far during the night practice session at 1:07.912, three-quarters ahead of the second Peugeot, and the Audis also running third and fourth.

Click above for a high-res gallery of the Audi R15 TDI

It was a sad day for the American Le Mans Series when Audi announced they were abandoning their U.S. racing program back in December. The German automaker had been a staple of the series since its inception, but with the exception of the 12 Hours of Sebring, which Audi won, and possibly a couple of races at the end of the season, the R15 TDI has and will be absent from the starting grid in 2009.

With Porsche now reigning over the Volkswagen auto empire, we can expect to see synergies between the small sportscar maker and all its new subsidiaries over the years to come. One of the first such opportunities has actually emerged in reverse out on the race track, as Audi Sport has ported over two of Porsche's most successful drivers to its Le Mans team.

The R8, the R10 and now the R15. Each of Audi's last three prototype Le Mans race cars have won their race debut, with the latest R15 recording its first victory yesterday at the 57th 12 Hours of Sebring. The winning #2 R15 was driving by Audi's dream team of Allan McNish, Dindo Capello and Tom Kristensen. Of course, Audi's win did not come easy in the top tier Le Mans P1 class. Peugeot was right there the whole time with its pair of diesel-powered 908 HDi cars, swapping the lead with Audi a total of 23 times. In fact, both teams remained on the same lap with each other throughout the entire 12-hour race.