The 12 Hours of Casablanca was a sports car endurance race organised on the route of the future Ain-Diab CircuitinMorocco. Only two editions were held in 1952 and 1953, before the race was replaced by the Moroccan Grand PrixinAgadir for the 1954 season.[1]
The race was held on a road circuit, partially on the main road from Casablanca, that was initially 4.2 kilometers long in 1952. By 1953, the route was changed to 3.26 kilometers. The competition was intended for sports racing cars and for passenger cars as well. The starting grid was of a 'Le Mans start'-type.[2][1]
In December 1952, the first edition of the 12 Hours of Casablanca race was held.[3] 24 entrants had started the race, but only 14 of them finished and were classified.[4][1][5]
| Pos. | No. | Drivers | Car | Laps |
|---|---|---|---|---|
| 1st | 22 |  Charles Pozzi Lucien Vincent
|
Talbot-Lago T26GS | 264 |
| 2nd | 25 | Jean Lucas Jacques Péron
|
Ferrari 225 S berlinetta[6] | 263 |
| 3rd | 16 | Georges de Tudert Robert La Caze
|
Delahaye 135S | 250 |
The second edition of the endurance race was held in 1953. This time 17 cars finished the race. Casimiro de Oliveira and Alberto Ascari had crashed during practice in their Ferrari 375 MM and had to change teams and cars.[7] Luckily for Ascari, he joined Luigi Villoresi in the Ferrari 500 Mondial and arrived second at the finish line in the actual race.[8] The 500 Mondial that won its class, was based on a Ferrari 625 TF berlinetta chassis that was destroyed in a fire, rebodied by Scaglietti and equipped with a 2.0-litre engine.[9] Charles Pozzi, who won the first edition with his Talbot-Lago T26GS, failed to arrive for the race.[10][1][11]
| Pos. | Pos. | Class | No. | Drivers | Car |
|---|---|---|---|---|---|
| 1st | 1st | S+2.0 | 2 |  Giuseppe Farina Piero Scotti
|
Ferrari 375 MM spyder[12] |
| 2nd | 1st | S2.0 | 20 | Luigi Villoresi Alberto Ascari
|
Ferrari 500 Mondial spyder |
| 3rd | 2nd | S+2.0 | 6 | Pierre Levegh Philippe Etancelin
|
Talbot-Lago T26GS |
| 4th | 3rd | S+2.0 | 8 |  Roy Salvadori "Mike Sparken"
|
Aston Martin DB3 coupé |
| 5th | 4th | S+2.0 | 7 | Graham Whitehead Peter Whitehead
|
Aston Martin DB3 |
| 6th | 2nd | S2.0 | 25 | Jean-Louis Armengaud Élie Bayol
|
Osca MT4 1100 coupé |
| Class | No. | Drivers | Car | DNF reason |
|---|---|---|---|---|
| S+2.0 | 3 | Luigi Piotti Clemente Biondetti
|
Ferrari 250 MM | Transmission |
| S+2.0 | 5 | Georges Grignard Lino Fayen
|
Talbot-Lago T26GS | Out of fuel |
| S+2.0 | 9 | Jean Behra André Guelfi
|
Gordini T15S | Holed fuel tank |
| S+2.0 | 10 | John Simone Armand Roboly
|
Jaguar C-Type | Fuel feed |
Between 1954 and 1956, no motor racing was organized on this dangerous road circuit and the racing was moved to the Agadir area. Ain-Diab was more suited for the bicycle races. In 1957, the race route was refitted and increased to 7.618 kilometers thanks to the Royal Automobile Club of Morocco. The new track was named Ain-Diab Circuit and hosted the first official Moroccan Grand Prix in 1957.[13]
