In training for the 24-hour race at Le Mans in 1969, Rolf Stommelen drove the 12-cylinder Porsche 917 Longtail with 3:22,900 minutes, the fastest lap time ever driven up to that point. They reached almost 350 km/h on the Hunaudièresstraight. Ferrari also competed with a 12-cylinder engine in the racing car, the 312 P, with Pedro Rodriguez and David Piper. Jo Siffert and Vic Elford in the 917 long tail led the race for a long time. But both her long tail and that of Stommelen/Ahrens failed. The same happened to the Ferrari 312 P of Chris Amon and Peter Schetty, as well as Rodriguez/Piper, who could not convert their superior speed into a success.