1991 Formula One season Drivers and constructors Drivers and constructors

| Entrant | Constructor_ | Chassis | Engine | Tyre | Driver | Rounds |
|---|---|---|---|---|---|---|
| Motor Racing Developments | Brabham - Yamaha | BT60Y | Yamaha OX99 3.5 V12 | P | Martin Brundle | All |
| Motor Racing Developments | Brabham - Yamaha | BT60Y | Yamaha OX99 3.5 V12 | P | Mark Blundell | All |
| Footwork Grand Prix International | Footwork - Porsche | A11C FA12 | Porsche 3512 3.5 V12 | G | Michele Alboreto | 1-6 |
| Footwork Grand Prix International | Footwork - Porsche | A11C FA12 | Porsche 3512 3.5 V12 | G | Alex Caffi | 1-4 |
| Footwork Grand Prix International | Footwork - Porsche | A11C FA12 | Porsche 3512 3.5 V12 | G | Stefan Johansson | 5-6 |
| Footwork Grand Prix International | Footwork - Ford | FA12C | Ford Cosworth DFR 3.5 V8 | G | Michele Alboreto | 7-16 |
| Footwork Grand Prix International | Footwork - Ford | FA12C | Ford Cosworth DFR 3.5 V8 | G | Stefan Johansson | 7-8 |