1975 Formula One season Drivers and constructors Drivers and constructors

| Entrant | Constructor_ | Chassis | Engine | Tyre | Driver | Rounds |
|---|---|---|---|---|---|---|
| Frank Williams Racing Cars | Williams - Ford | FW FW04 | Ford Cosworth DFV 3.0 V8 | G | Ian Ashley | 11 |
| Frank Williams Racing Cars | Williams - Ford | FW FW04 | Ford Cosworth DFV 3.0 V8 | G | Jo Vonlanthen | 12 |
| Frank Williams Racing Cars | Williams - Ford | FW FW04 | Ford Cosworth DFV 3.0 V8 | G | Renzo Zorzi | 13 |
| Frank Williams Racing Cars | Williams - Ford | FW FW04 | Ford Cosworth DFV 3.0 V8 | G | Lella Lombardi | 14 |
| Frank Williams Racing Cars | Williams - Ford | FW FW04 | Ford Cosworth DFV 3.0 V8 | G | Jacques Laffite | 1-3, 5-6, 8-14 |
| Frank Williams Racing Cars | Williams - Ford | FW FW04 | Ford Cosworth DFV 3.0 V8 | G | Tony Brise | 4 |