With so little mileage clocked up, both of the R8C cars struggled with various mechanical problems at pre-qualifying but were able to set respectable times. Unsurprisingly, they could not match the pace of the R8R and further testing of the R8Cs took place at Silverstone in the weeks leading up to the 24 Hour race.

In final qualifying, as expected, the Audi Sport Team Joest R8Rs lined up 9th and 11th with the Audi Sport UK R8Cs back in 20th and 23rd. The R8Cs were roughly 7 and 10 seconds slower respectively. In the race, the story was the same. The R8Cs were beset with gearbox problems and the number 9 car retired after only 55 laps. The second car battled on through the night but eventually succumbed to the same problem at the 17 hour mark.

The results did not reflect the advantages of the LM-P over the LM-GTP concept. Both of the LM-GTP Toyota and Mercedes cars had been faster than the open topped LM-P Audi R8Rs and the BMWs but, as with the R8C, they simply did not have the reliability to finish the race.

Audi shelved the R8C and concentrated on developing its R8R concept without competition from the other big manufacturers. Audi R8 roadsters won Le Mans in the next three successive years and triumphed heavily in the ALMS and LMES series which replaced the FIA GT Championships as the biggest international sportscar packages.