In response to the dominance of the German teams in grand prix racing, the Automobile Club de France (ACF) had chosen to run their Grand Prix to a sports-car formula, which would in turn be eligible to run at Le Mans.
Acknowledging the dominance of German teams in grand prix racing, the Automobile Club de France (ACF) decided to organize its Grand Prix under a sports-car formula that could participate in the Le Mans event as well.