Peugeot was involved in motorsport from the earliest days and entered five cars for the Paris-Rouen Trials in 1894 with one of them, driven by Lemaître, finishing second (the winning car was a steam powered car and was therefore disqualified meaning Lemître was promoted to first). These trials are usually regarded as the first motor sporting competition. Participation in a variety of events continued until World War I, but in 1912, Peugeot made its most notable contribution to motor sporting history when one of their cars, driven by Georges Boillot, won the French Grand Prix at Dieppe. This revolutionary car was powered by a straight-4 engine designed by Ernest Henry under the guidance of the technically knowledgeable racing drivers Paul Zuccarelli and Georges Boillot. The design was very influential for racing engines as it featured for the first time DOHC and four valves per cylinder, providing for high engine speeds, a radical departure from previous racing engines which relied on huge displacement for power. In 1913, Peugeots of similar design to the 1912 Grand Prix car won the French Grand Prix at Amiens and the Indianapolis 500. When one of the Peugeot racers remained in the United States during World War I and parts could not be acquired from France for the 1914 season, owner Bob Burman had it serviced in the shop of Harry Miller by a young mechanic named Fred Offenhauser. Their familiarity with the Peugeot engine was the basis of the famed Miller racing engine, which later developed into the Offenhauser.