Bachmann operated as a car dealer in La Madeleine, in the Nord department near Lille in northern France. Through his work representing Chenard & Walcker vehicles, he served simultaneously as administrator of the brand's French establishments. His close commercial relationship with the manufacturer provided a natural path into competitive motorsport as part of the official Chenard & Walcker racing programme.
Bachmann's most historically significant appearance came in 1923, when he entered the very first edition of the 24 Hours of Le Mans. The race was organised by the Automobile Club de l'Ouest and held on the Circuit de la Sarthe on 26 and 27 May. Chenard & Walcker entered three cars, all Chenard & Walcker 3.0L S4 machines.
Bachmann was paired with co-driver Raymond Glaszmann in car number 11. The pairing completed the race to finish seventh overall. The result placed Bachmann among the finishers of the inaugural Le Mans, a distinction shared by a very small number of drivers.
The performance of the wider Chenard & Walcker team that day was exceptional. Bachmann's brother Raoul, paired with Christian Dauvergne in car number 10, took second place. The third Chenard & Walcker entry, number 9, driven by Andre Lagache and Rene Leonard, won the race outright. This gave the manufacturer a remarkable clean sweep of first, second, and third place in the inaugural running of what would become the world's most famous endurance race — a hat-trick that has remained one of the most dominant manufacturer performances in Le Mans history.
Bachmann returned to Le Mans the following year for the 1924 24 Hours, this time sharing duties with his brother Raoul. They drove a newer Chenard & Walcker Type TT 12CV 2-litre car. The race did not go according to plan: a spectacular road exit ended the brothers' participation before the finish, leaving the 1923 result as the high point of their Le Mans partnership.
Bachmann continued to compete in international endurance events through the mid-1920s, extending his career beyond the Le Mans circuit. In 1925 he took part in the Spa 24 Hours, the Belgian endurance classic held on the legendary Spa-Francorchamps road circuit. In 1926 he competed at the 24 Hours of San Sebastian, further demonstrating a commitment to long-distance racing at venues across western Europe.
Bachmann's seventh-place finish in the 1923 24 Hours of Le Mans places him among the founding generation of drivers who competed at what is now recognised as the world's pre-eminent endurance race. His participation came as both a commercial representative of Chenard & Walcker and a competitive driver in his own right, at a time when the boundaries between manufacturer representative, dealer, and racing entrant were often blurred. The overall achievement of the Chenard & Walcker team on that historic May weekend in 1923 — with Bachmann contributing to a day in which the manufacturer locked out the top three positions — remains a landmark moment in Le Mans and French motorsport history.
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