1951 Formula One season Teams and drivers Teams and drivers

| Entrant | Constructor_ | Chassis | Engine | Tyre | Driver | Rounds |
|---|---|---|---|---|---|---|
| Scuderia Ambrosiana | Maserati | 4CLT/48 | Maserati 4CLT 1.5 L4 s | D | David Murray | 5–6 |
| John James | Maserati | 4CLT/48 | Maserati 4CLT 1.5 L4 s | D | John James | 5 |
| Philip Fotheringham-Parker | Maserati | 4CL | Maserati 4CLT 1.5 L4 s | D | Philip Fotheringham-Parker | 5 |
| Duncan Hamilton | Talbot-Lago | T26C | Talbot 23CV 4.5 L6 | D | Duncan Hamilton | 5–6 |
| Antonio Branca | Maserati | 4CLT/48 | Maserati 4CLT 1.5 L4 s | P | Toni Branca | 6 |
| Francisco Landi | Ferrari | 375 | Ferrari 375 4.5 V12 | P | Chico Landi | 7 |
| Peter Whitehead | Ferrari | 125 | Ferrari 125 1.5 V12 s | D | Peter Whitehead | 7 |
| OSCA Automobili | OSCA | 4500G | OSCA 4500 4.5 V12 | P | Franco Rol | 7 |