1921 Grand Prix de l'A.C.F.
| Date | 26.07.1921 | Category | Grand Prix Formula |
| Circuit | Circuit de la Sarthe | Championship | |
| Race title | XV Grand Prix de l'A.C.F. | Round | |
| Distance | 30 laps = 517.8 km | Country | France |
Winner's speed: 125.70 kmh
Pole's speed: n/a
Fastest lap speed: 134.23 kmh
| Rank | Pos. | # | Driver | Entrant | Car | Laps | Laps lead | Time | Status | FL time | FL rank | Grid | Row |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 12 | Jimmy Murphy | Duesenberg Motor Co | Duesenberg | 30 | 21 | 4:07'11.4 | finished | 7'43.0 | 1 | 8 | 4 |
| 2 | 2 | 1 | Ralph de Palma | Etablissements Ballot | Ballot 3L | 30 | 4:22'10.6 | finished | 1 | 1 | |||
| 3 | 3 | 18 | Jules Goux | Etablissements Ballot | Ballot 2LS | 30 | 4:28'38.6 | finished | 12 | 6 | |||
| 4 | 4 | 19 | Andre Dubonnet | Duesenberg Motor Co | Duesenberg | 30 | 4:30'19.2 | finished | 13 | 7 | |||
| 5 | 5 | 15 | Andre Boillot | Automobiles Talbot | Sunbeam | 30 | 4:35'17.4 | finished | 10 | 5 | |||
| 6 | 6 | 6 | Albert Guyot | Duesenberg Motor Co | Duesenberg | 30 | 4:43'13.0 | finished | 5 | 3 | |||
| 7 | 7 | 14 | Louis Wagner | Etablissements Ballot | Ballot 3L | 30 | 4:48'01.1 | finished | 9 | 5 | |||
| 8 | 8 | 4 | Kenelm Lee Guinness | Automobiles Talbot | Sunbeam | 30 | 5:06'43.8 | finished | 3 | 2 | |||
| 9 | 9 | 10 | Henry Segrave | Automobiles Talbot | Sunbeam | 30 | 5:08'06.0 | finished | 7 | 4 | |||
| 10 | 5 | Rene Thomas | Automobiles Talbot | Sunbeam | 23 | DNF, oil tank | 4 | 2 | |||||
| 11 | 8 | Jean Chassagne | Etablissements Ballot | Ballot 3L | 17 | 7 | DNF, fuel tank | 6 | 3 | ||||
| 12 | 16 | Joe Boyer | Duesenberg Motor Co | Duesenberg | 17 | 2 | DNF, engine | 11 | 6 | ||||
| 13 | 3 | Emile Mathis | SA Mathis | Mathis | 5 | DNF, engine | 2 | 1 | |||||
| 14 | 11 | Louis Zborowski | Automobiles Talbot | Sunbeam | DNS, car not ready | ||||||||
| 15 | 2 | Ugo Sivocci | Fiat spA | Fiat 802 | DNA, car not ready | ||||||||
| 16 | 7 | Andre Dubonnet | Sunbeam Motor Co | Sunbeam | DNA, car not ready | ||||||||
| 17 | 9 | Pietro Bordino | Fiat spA | Fiat 802 | DNA, car not ready | ||||||||
| 18 | 13 | Dario Resta | Sunbeam Motor Co | Sunbeam | DNA, car not ready | ||||||||
| 19 | 17 | Louis Inghilbert | Duesenberg Motor Co | Duesenberg | DNA |