| Car manufacturers / 1956 | |||
| « 1955 | 1957 » |
| Car manufacturer | Races | Starts | Poles | Wins | Podia | F. laps | Pts | |
| 1 | BRM | 7 | 3 | |||||
| 2 | Bugatti | 1 | 1 | |||||
| 3 | Connaught | 10 | 7 | 1 | 9 | |||
| 4 | Cooper | 1 | 1 | |||||
| 5 | Emeryson | 1 | 1 | |||||
| 6 | Epperly | 1 | ||||||
| 7 | Ewing | 1 | ||||||
| 8 | Ferrari | 47 | 43 | 6 | 5 | 14 | 4 | 82 |
| 9 | Gordini | 15 | 14 | 2 | ||||
| 10 | Hillegass | 1 | ||||||
| 11 | Kurtis Kraft | 35 | 24 | 1 | 1 | 9 | ||
| 12 | Kuzma | 7 | 6 | 3 | ||||
| 13 | Lesovsky | 4 | 1 | |||||
| 14 | Maserati | 74 | 66 | 1 | 2 | 11 | 3 | 72 |
| 15 | Phillips | 1 | 1 | 1 | 4 | |||
| 16 | Schroeder | 2 | ||||||
| 17 | Silnes | 1 | ||||||
| 18 | Stevens | 1 | 1 | |||||
| 19 | Templeton | 1 | ||||||
| 20 | Vanwall | 14 | 13 | 3 | ||||
| 21 | Watson | 1 | 1 | 1 | 1 | 1 | 8 |