2005 Formula One season Drivers and constructors Drivers and constructors

| Entrant | Constructor_ | Chassis | Engine_ | Tyre | Driver | Rounds |
|---|---|---|---|---|---|---|
| BMW WilliamsF1 Team | Williams - BMW | FW27 | BMW P84/5 | M | Mark Webber | All |
| BMW WilliamsF1 Team | Williams - BMW | FW27 | BMW P84/5 | M | Nick Heidfeld | 1–14 |
| BMW WilliamsF1 Team | Williams - BMW | FW27 | BMW P84/5 | M | Antônio Pizzonia | 15–19 |
| West McLaren Mercedes Team McLaren Mercedes | McLaren - Mercedes | MP4-20 | Mercedes FO110R | M | Kimi Räikkönen | All |
| West McLaren Mercedes Team McLaren Mercedes | McLaren - Mercedes | MP4-20 | Mercedes FO110R | M | Juan Pablo Montoya | 1–2, 5–19 |
| West McLaren Mercedes Team McLaren Mercedes | McLaren - Mercedes | MP4-20 | Mercedes FO110R | M | Pedro de la Rosa | 3 |
| West McLaren Mercedes Team McLaren Mercedes | McLaren - Mercedes | MP4-20 | Mercedes FO110R | M | Alexander Wurz | 4 |