Alfa Romeo
Toulo de Graffenried terminó P17 en el Campeonato del Mundo de 1951 con 2 puntos. En 5 carreras: 0 victorias, 0 podios y 0 pole positions — mejor resultado P5.
| Round | Race | Team | Grid | Finish | Points | Status |
|---|---|---|---|---|---|---|
| 1 | Swiss Grand Prix | Alfa Romeo | 5 | P5 | 2 | +2 Laps |
| 4 | French Grand Prix | Maserati | 16 | P22 | Transmission | |
| 6 | German Grand Prix | Maserati | 16 | P22 | Engine | |
| 7 | Italian Grand Prix | Alfa Romeo | 9 | P18 | Supercharger | |
| 8 | Spanish Grand Prix | Alfa Romeo | 6 |
| P6 |
| +4 Laps |