The first Dufaux was built to enter the famous Gordon Bennett Cup race, held that year in the region of Taunus near Frankfurt am Main.

The event was a total failure for the Dufaux brothers as their car with the number 7 not even could start because of a broken wheel.

The official Gordon Bennett homepage mentions an 80 HP Dufaux with a straight eight-cylinder engine entering the 1905 event.

As the result list neither mentions the Dufaux brother nor their car, it is safe to conclude that they didn't make it to the start.

Frédéric Dufaux broke with this car the world record on 13 November 1905 at a speed of 98 mph (158 km/h) .