1973 Formula One season Championship drivers and constructors Championship drivers and constructors

| Entrant | Constructor_ | Chassis | Engine | Tyre | Driver | Rounds |
|---|---|---|---|---|---|---|
| Marlboro BRM | BRM | P160C P160D | BRM P142 3.0 V12 | F | Niki Lauda | All |
| Marlboro BRM | BRM | P160C P160D | BRM P142 3.0 V12 | F | Peter Gethin | 14 |
| Frank Williams Racing Cars | Iso-Marlboro - Ford | FX3B IR | Ford Cosworth DFV 3.0 V8 | F | Nanni Galli | 1-2, 4-6 |
| Frank Williams Racing Cars | Iso-Marlboro - Ford | FX3B IR | Ford Cosworth DFV 3.0 V8 | F | Howden Ganley | All |
| Frank Williams Racing Cars | Iso-Marlboro - Ford | FX3B IR | Ford Cosworth DFV 3.0 V8 | F | Jackie Pretorius | 3 |
| Frank Williams Racing Cars | Iso-Marlboro - Ford | FX3B IR | Ford Cosworth DFV 3.0 V8 | F | Tom Belsø | 7 |