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

| Entrant | Constructor_ | Chassis | Engine | Tyre | Driver | Rounds |
|---|---|---|---|---|---|---|
| Frank Williams Racing Cars | Iso-Marlboro - Ford | FX3B IR | Ford Cosworth DFV 3.0 V8 | F | Henri Pescarolo | 8, 11 |
| Frank Williams Racing Cars | Iso-Marlboro - Ford | FX3B IR | Ford Cosworth DFV 3.0 V8 | F | Graham McRae | 9 |
| Frank Williams Racing Cars | Iso-Marlboro - Ford | FX3B IR | Ford Cosworth DFV 3.0 V8 | F | Gijs van Lennep | 10, 12-13 |
| Frank Williams Racing Cars | Iso-Marlboro - Ford | FX3B IR | Ford Cosworth DFV 3.0 V8 | F | Tim Schenken | 14 |
| Frank Williams Racing Cars | Iso-Marlboro - Ford | FX3B IR | Ford Cosworth DFV 3.0 V8 | F | Jacky Ickx | 15 |
| UOP Shadow Racing Team | Shadow - Ford | DN1 | Ford Cosworth DFV 3.0 V8 | G | Jackie Oliver | 3-15 |