A successful debut for the Audi R10 in the fifth round of the American Le Mans Series at Miller Motorsports Park in Salt Lake City was threatened yesterday as the No. 6 Porsche RS Spyder in the LMP2 class driven by Lucas Luhr pressured the No. 1 Audi R10 in the LMP1 class driven by Emanuele Pirro all the way to the end. Mad props must be given to Luhr for such excellent driving, especially in the high altitude, high temperature environment where his naturally aspirated motor was down some 60 horsepower, according to Porsche.

Both R10 diesel racers fielded by Audi had issues throughout the race. The No. 2 car led for much of the race but suffered a slow puncture in its rear left tire that dropped it back to a fourth place overall finish. The winning No. 1 car went off track early on and was forced to charge back through the field from 6th position.

Finally, a pair of Aston Martin DBR9 racers finished 1-2 in the GT1 class, ahead of the 3-4 finishing Corvette C6.Rs. It was the first time since October 2003 a Corvette hadn't finished first or second, the second consecutive win for Aston Martin, and the first 1-2 finish for Aston since the marque entered ALMS at Sebring last year. Along with the high altitude, the Corvette team blamed series-mandated handicaps that gave them 1-mm smaller intake air restrictors, 10-liter smaller fuel tanks, and 199 more pounds than their British rivals for the loss.

[More pics of Audi and Porsche at Miller Motorsports Park after the jump)

[Source: Audi, Porsche, GM, American Le Mans Series]