| 2021 World Drivers Championship 1.6 Litre Turbo Charged Maximum of 6 Cylinders |
| Driver | Nat. | Car-Engine-Model | Car Number |
| Kimi Raikkonen | FIN | Alfa Romeo C41-Ferrari | 7 |
| Robert Kubica | PL | Alfa Romeo C41-Ferrari | 88 |
| Antonio Giovinazzi | I | Alfa Romeo C41-Ferrari | 99 |
| Pierre Gasly | F | Alpha Tauri AT02-Honda | 10 |
| Yuki Tsunoda | J | Alpha Tauri AT02-Honda | 22 |
| Fernando Alonso | E | Alpine A521-Renault | 14 |
| Esteban Ocon | F | Alpine A521-Renault | 31 |
| Sebastian Vettel | D | Aston Martin AMR21-Mercedes | 5 |
| Lance Stroll | CDN | Aston Martin AMR21-Mercedes | 18 |
| Carlos Sainz Jr. | E | Ferrari SF21-Ferrari | 55 |
| Charles Leclerc | MC | Ferrari SF21-Ferrari | 16 |
| Mick Schumacher | D | Haas VF21-Ferrari | 47 |
| Nikita Mazepin | RF | Haas VF21-Ferrari | 9 |
| Daniel Ricciardo | AUS | McLaren MCL35M-Mercedes | 3 |
| Lando Norris | GB | McLaren MCL35M-Mercedes | 4 |
| Valtteri Bottas | FIN | Mercedes F1 W12-Mercedes | 77 |
| Lewis Hamilton | GB | Mercedes F1 W12-Mercedes | 44 |
| Max Verstappen | NL | Red Bull RB16B-Honda | 33 |
| Sergio Perez | MEX | Red Bull RB16B-Honda | 11 |
| George Russell | GB | Williams FW43B-Mercedes | 63 |
| Nicholas Latifi | CDN | Williams FW43B-Mercedes | 6 |