The event is called Grand Prix of the Automobile Club of Île-de-France. Following the accident of the 24 Hours of Le Mans 1955 and the measures taken by the public authorities, the safety conditions of the Linas-Montlhéry autodrome were improved; in particular 34 stands, with access to refueling, were built. A Maserati 300S win at the average speed of 150.239 km/h. A Gordini T15S finished in eighth place, a DB Panhard at the thirteenth, a Ferry powered by Renault at the fourteenth and a Vernet-Pairard — also powered by Renault — at the sixteenth. The three Panhard Monopoles did not finish.
The race became part of the World Sportscar Championship. René Bonnet and Charles Deutsch each line up a 1000 cm3 prototype powered by Renault and Panhard. The domination of the Ferrari 250 GTO was unchallenged in the first six places: Pedro and Ricardo Rodriguez win another victory at 157,727 km/h average.
The race was interrupted after 540 km. The four Ferrari F40s entered in the Group GT1 were broken, as was the McLaren F1 GTR; only a Venturi 600 LM had saved the GT1's honor by finishing in fourth place.
Endurance racing in Paris before 1956
Prior to 1956 other races were held at Montlhéry for touring cars. These included:
Grand Prix Tourisme of the AC.F.
- 1925 (1000 kilometers of Paris) — won by André Boillot in a Peugeot 18CV ahead of Pierre Gaudermen, covering nearly 1,050 km (652.4 mi) in less than 12 hours 13 minutes.
24 Hours of Paris
- 1927 — George Duller and Frank Clement led from start to finish in a Bentley 4½ Litre.
- 1955 — Auguste Veuillet and Gonzague Olivier, in a 1.1 L Porsche 550 Spyder.
8 Hours of Montlhéry
12 Hours of Paris
- 1938 — René Le Bègue and André Morel, in a Talbot Lago T26 for the first Olazur Cup.
- 1939 — Ten days before the scheduled race date Germany invades Poland, starting the Second World War. Race is cancelled.
- 1947 — Guy Mairesse, in a Delahaye 135.
- 1948 — Luigi Chinetti, in a Ferrari 166 Spyder Corsa.
- 1950 — Luigi Chinetti and Jean Lucas, in a Ferrari 166 MM.
Grand Prix of the AC.F. (French Grand Prix)
- 1931 French Grand Prix – The Grand Prix was held as a 10 hour endurance race for Grand Prix cars, won by Louis Chiron and Achille Varzi driving a Bugatti.
- 1936 French Grand Prix – The Grand Prix was held as a 1000km race for Sports Cars. Won by Jean-Pierre Wimille and Raymond Sommer driving a Bugatti.
- 1937 French Grand Prix – The Grand Prix was held as a 500km race for Sports Cars. Won by Louis Chiron driving a Talbot.
- Ferry (GTFrance).
- 1000 km de Paris 1956 (Panhard Racing Team).
- 1000 kilomètres de Paris 1962 (Racing Sports Cars).
- 1000 kilomètres de Paris 1966 (Racing Sports Cars).
- 1000 kilomètres de Paris 1967 (YouTube Video).
- 1000 kilomètres de Paris 1968 (YouTube Video).
- 1000 kilomètres de Paris 1969 (Racing Sports Cars).
- 1000 kilomètres de Paris 1970 (Racing Sports Cars).
- Higham, Peter (1995). The Guinness Guide to International Motor Racing. p. 374. ISBN 0851126421.
- Les Grand Prix de Paris sur l'autodrome Archived 2014-11-08 at the Wayback Machine - P. Pannetier, Autodrome.over-blog.com, 19 décembre 2007
- GP de l'A.C.F. Tourisme 1925 (RacingSportsCars).
- 8 h Montlhéry - RacingSportsCars
- Affiche des 12 Heures de Paris 1939
- Résultats des 12 Heures de Paris 1938 - RacingSportsCars
- Résultats des 12 Heures de Paris 1950 - RacingSportsCars
- William Boddy, Montlhéry, the story of the Paris autodrome ISBN 1-84584-052-6