| Type: | EC |
| Grand Prix: | French |
| Date: | 21 June |
| Year: | 1931 |
| Official Name: | XXV Grand Prix de l'Automobile Club de France |
| Country: | France |
| Race No: | 2 |
| Season No: | 3 |
| Location: | Autodrome de Linas-Montlhéry Montlhéry, France |
| Course Mi: | 7.770 |
| Course Km: | 12.505 |
| Distance Laps: | 101 |
| Distance Mi: | 799.596 |
| Distance Km: | 1286.825 |
| Pole Driver: | William "Bummer" Scott |
| Pole Country: | UK |
| Pole Driver2: | S. Armstrong-Payne |
| Pole Country2: | UK |
| Pole Team: | Delage |
| Grid From Ballot: | True(Grid positions set by ballot) |
| Fast Driver: | Luigi Fagioli |
| Fast Team: | Maserati |
| Fast Time: | 5:29 |
| Fast Country: | Italy |
| Fast Flag Suffix: | 1861 |
| First Driver: | Louis Chiron |
| First Team: | Bugatti |
| First Country: | Monaco |
| First Driver2: | Achille Varzi |
| First Country2: | Italy |
| First Flag Suffix2: | 1861 |
| Second Driver: | Giuseppe Campari |
| Second Team: | Alfa Romeo |
| Second Country: | Italy |
| Second Flag Suffix: | 1861 |
| Second Driver2: | Baconin Borzacchini |
| Second Country2: | Italy |
| Second Flag Suffix2: | 1861 |
| Third Driver: | Clemente Biondetti |
| Third Team: | Maserati |
| Third Country: | Italy |
| Third Flag Suffix: | 1861 |
| Third Driver2: | Luigi Parenti |
| Third Country2: | Italy |
| Third Flag Suffix2: | 1861 |
The 1931 French Grand Prix (formally the XXV Grand Prix de l'A.C.F.) was a Grand Prix motor race held at Autodrome de Linas-Montlhéry on 21 June 1931. As with the other two races in the 1931 AIACR European Championship, this race was held over 10 hours, not over a fixed distance. As a result, most cars had two drivers.[1]
The race was won by Louis Chiron and Achille Varzi driving a factory entered Bugatti T51, who after early race battles lead more than eight hours of the race
| Pos | No | Driver | Team | Car | Laps | Time/Retired | Grid | Points |
|---|---|---|---|---|---|---|---|---|
| 1 | 32 |  Louis Chiron | Bugatti | Bugatti T51 | 101 | 126.88 km/h | 12 | 1 |
 Achille Varzi | 1 | |||||||
| 2 | 18 | Giuseppe Campari | Alfa Corse | Alfa Romeo 8C Monza | 97 | +4 Laps | 5 | 2 |
| Baconin Borzacchini | 2 | |||||||
| 3 | 46 | Clemente Biondetti | Maserati | Maserati 26M | 94 | +7 Laps | 19 | 3 |
| Luigi Parenti | 3 | |||||||
| 4 | 40 |  Henry Birkin | Maserati | Maserati 26M | 94 | +7 Laps | 16 | 4 |
| George Eyston | 4 | |||||||
| 5 | 36 |  Robert Sénéchal | Delage | Delage 15-S-8 | 91 | +10 Laps | 14 | 4 |
| 6 | 4 | Ferdinando Minoia | Alfa Corse | Alfa Romeo 8C Monza | 90 | +11 Laps | 2 | 4 |
| Goffredo Zehender | 4 | |||||||
| 7 | 28 | Albert Divo | Bugatti | Bugatti T51 | 90 | +11 Laps | 10 | 4 |
| Guy Bouriat | 4 | |||||||
| 8 | 20 | René Dreyfus | Maserati | Maserati 26M | 88 | +13 Laps | 6 | 4 |
| Pietro Ghersi | 4 | |||||||
| 9 | 24 | René Ferrant | Private entry | Peugeot 174S | 85 | +16 Laps | 8 | 4 |
| Louis Rigal | 4 | |||||||
| 10 | 48 | Jean Pesato | Private entry | Alfa Romeo 6C-1750 | 84 | +17 Laps | 20 | 4 |
| Pierre Félix | 4 | |||||||
| 11 | 44 | Tazio Nuvolari | Alfa Corse | Alfa Romeo 8C Monza | 83 | +18 Laps | 18 | 4 |
| Giovanni Minozzi | 4 | |||||||
| 12 | 30 | Earl Howe | Private entry | Bugatti T51 | 77 | +24 Laps | 11 | 4 |
| Brian Lewis | 4 | |||||||
| Ret | 38 | Jean-Pierre Wimille | Private entry | Bugatti T51 | 71 | Suspension | 15 | 5 |
| Jean Gaupillat | 5 | |||||||
| Ret | 38 | William Grover-Williams | Private entry | Bugatti T51 | 65 | Gearbox | 17 | 5 |
| Caberto Conelli | 5 | |||||||
| Ret | 34 | Emilio Eminente | Private entry | Bugatti T35B | 59 | Fire | 13 | 5 |
| Edmond Bourlier | 5 | |||||||
| Ret | 22 | Georges d'Arnoux | Private entry | Bugatti T35C | 58 | Mechanical | 7 | 5 |
| Max Fourny | 5 | |||||||
| Ret | 50 | Enzo Grimaldi | Private entry | Bugatti T35C | 49 | Mechanical | 21 | 6 |
| "Bourgait" | 6 | |||||||
| Ret | 10 | Luigi Fagioli | Maserati | Maserati 26M | 45 | Brakes | 3 | 6 |
| Ernesto Maserati | 6 | |||||||
| Ret | 58 |  Rudolf Caracciola | Private entry | Mercedes-Benz SSKL | 39 | Supercharger | 23 | 6 |
| Otto Merz | 6 | |||||||
| Ret | 2 | William "Bummer" Scott | Delage | Delage 15-S-8 | 22 | Rear axle | 1 | 7 |
| S. Armstrong-Payne | 7 | |||||||
| Ret | 52 | Marcel Lehoux | Bugatti | Bugatti T51 | 15 | Mechanical | 22 | 7 |
| Philippe Étancelin | 7 | |||||||
| Ret | 22 |  Boris Ivanowski[2] | Private entry | Mercedes-Benz SSK | 11 | Differential | 9 | 7 |
| Henri Stoffel | 7 | |||||||
| Ret | 12 | Jack Dunfee | Private entry | Sunbeam GP | 0 | Rear axle | 4 | 7 |
| Appleyard | 7 | |||||||