1991 Formula One season Drivers and constructors Drivers and constructors

| Entrant | Constructor_ | Chassis | Engine | Tyre | Driver | Rounds |
|---|---|---|---|---|---|---|
| Footwork Grand Prix International | Footwork - Ford | FA12C | Ford Cosworth DFR 3.5 V8 | G | Alex Caffi | 9-16 |
| Team Lotus | Lotus - Judd | 102B | Judd EV 3.5 V8 | G | Mika Häkkinen | All |
| Team Lotus | Lotus - Judd | 102B | Judd EV 3.5 V8 | G | Julian Bailey | 1-4 |
| Team Lotus | Lotus - Judd | 102B | Judd EV 3.5 V8 | G | Johnny Herbert | 5-8, 11, 13, 15-16 |
| Team Lotus | Lotus - Judd | 102B | Judd EV 3.5 V8 | G | Michael Bartels | 9-10, 12, 14 |
| Fondmetal | Fondmetal - Ford | FA1M-E Fomet-1 | Ford Cosworth DFR 3.5 V8 | G | Olivier Grouillard | 1-13 |
| Fondmetal | Fondmetal - Ford | FA1M-E Fomet-1 | Ford Cosworth DFR 3.5 V8 | G | Gabriele Tarquini | 14-16 |