Since 1926 the Le Mans 24 Hours is characterized by the “Index of performance” classification, connected with the engine capacity, consumption of gasoline and distance.
In the post-war years this classification became a private field for the French manufacturers of small capacity cars with advanced aerodynamic specification, like this Monopole: fitted with a 750cc Panhard engine, it raced three times at Le Mans between 1956 and 1958.
Its race career continued in the years, after being modified by Monopole with a 850cc engine.