1955 Formula One season Teams and drivers Teams and drivers

| Entrant | Constructor_ | Chassis | Engine | Tyre | Driver | Rounds |
|---|---|---|---|---|---|---|
| Connaught Engineering | Connaught - Alta | B | Alta GP 2.5 L4 | D | Jack Fairman | 6 |
| Connaught Engineering | Connaught - Alta | B | Alta GP 2.5 L4 | D | Tony Rolt | 6 |
| Connaught Engineering | Connaught - Alta | B | Alta GP 2.5 L4 | D | Peter Walker | 6 |
| Connaught Engineering | Connaught - Alta | B | Alta GP 2.5 L4 | D | Leslie Marr | 6 |
| Cooper Car Company | Cooper - Bristol | T40 | Bristol BS1 2.0 L6 | D | Jack Brabham | 6 |
| Owen Racing Organisation | Maserati | 250F | Maserati 250F1 2.5 L6 | D | Peter Collins | 6 |
| Gilby Engineering | Maserati | 250F | Maserati 250F1 2.5 L6 | D | Roy Salvadori | 6 |
| Scuderia Volpini | Arzani-Volpini - Maserati | F1 | Maserati 4CLT 2.5 L4 | P | Luigi Piotti | 7 |