| Constructors / 1956 | |||
| « 1955 | 1957 » |
| Constructor | Races | Starts | Poles | Wins | Podia | F. laps | Pts | |
| 1 | BRM | 7 | 3 | |||||
| 2 | Bugatti | 1 | 1 | |||||
| 3 | Connaught-Alta | 10 | 7 | 1 | 9 | |||
| 4 | Cooper-Bristol | 1 | 1 | |||||
| 5 | Emeryson-Alta | 1 | 1 | |||||
| 6 | Epperly-Offenhauser | 1 | ||||||
| 7 | Ewing-Offenhauser | 1 | ||||||
| 8 | Ferrari | 47 | 43 | 6 | 5 | 14 | 4 | 82 |
| 9 | Gordini | 15 | 14 | 2 | ||||
| 10 | Hillegass-Offenhauser | 1 | ||||||
| 11 | Kurtis Kraft-Ferrari | 1 | ||||||
| 12 | Kurtis Kraft-Novi | 2 | 1 | 1 | 1 | |||
| 13 | Kurtis Kraft-Offenhauser | 32 | 23 | 1 | 8 | |||
| 14 | Kuzma-Offenhauser | 7 | 6 | 3 | ||||
| 15 | Lesovsky-Offenhauser | 3 | 1 | |||||
| 16 | Lesovsky-Studebacker | 1 | ||||||
| 17 | Maserati | 74 | 66 | 1 | 2 | 11 | 3 | 72 |
| 18 | Phillips-Offenhauser | 1 | 1 | 1 | 4 | |||
| 19 | Schroeder-Offenhauser | 2 | ||||||
| 20 | Silnes-Offenhauser | 1 | ||||||
| 21 | Stevens-Offenhauser | 1 | 1 | |||||
| 22 | Templeton-Offenhauser | 1 | ||||||
| 23 | Vanwall | 14 | 13 | 3 | ||||
| 24 | Watson-Offenhauser | 1 | 1 | 1 | 1 | 1 | 8 |