1991 Formula One season Drivers and constructors Drivers and constructors

| Entrant | Constructor_ | Chassis | Engine | Tyre | Driver | Rounds |
|---|---|---|---|---|---|---|
| Minardi Team | Minardi - Ferrari | M191 | Ferrari 037 3.5 V12 | G | Gianni Morbidelli | 1-15 |
| Minardi Team | Minardi - Ferrari | M191 | Ferrari 037 3.5 V12 | G | Roberto Moreno | 16 |
| Equipe Ligier Gitanes | Ligier - Lamborghini | JS35 JS35B | Lamborghini 3512 3.5 V12 | G | Thierry Boutsen | All |
| Equipe Ligier Gitanes | Ligier - Lamborghini | JS35 JS35B | Lamborghini 3512 3.5 V12 | G | Érik Comas | All |
| Scuderia Ferrari | Ferrari | 642 642/2 643 | Ferrari 037 3.5 V12 | G | Alain Prost | 1-15 |
| Scuderia Ferrari | Ferrari | 642 642/2 643 | Ferrari 037 3.5 V12 | G | Gianni Morbidelli | 16 |
| Scuderia Ferrari | Ferrari | 642 642/2 643 | Ferrari 037 3.5 V12 | G | Jean Alesi | All |