Total de marques participants: 21 (11 a Indianapolis)
Total de models participants: 29 (15 a Indianapolis)
Total de motors participants: 11 (1 a Indianapolis)
Total de pneumàtics participants: 6 (Pirelli, Dunlop, Englebert, Continental, Avon i Firestone)
Debutants: 6 (Mercedes-Benz, Klenk, Lancia, Pankratz, Phillips, Vanwall)
Última temporada: 3 (Bromme, Klenk, Nichels)
 |
| Els dos tipus de Mercedes W196, conduits per Nico Rosberg i Michael Schumacher. |
| Marca | Model | Motor | Pneumàtics |
| Cooper | T23 T24 |
Bristol BS1 2000 cc L6
Alta GP 2500 cc L4 |
Dunlop |
| Ferrari | 500 553 625 |
500 2000 cc L4 554 2500 cc L4 625 2500 cc L4 |
Pirelli Englebert Avon Dunlop |
| Connaught | A | Lea Francis 2000 cc L4 | Dunlop |
| Maserati | A6GCM 250F |
A6 2000 cc L6 250F1 2500 cc L6 |
Pirelli |
| Gordini | T16 | 23 2500 cc L6 | Englebert |
| Mercedes-Benz | W196 | M196 2500 cc L8 | Continental |
| HWM | 53 | Alta GP 2500 cc L4 | Dunlop |
| Lancia | D50 | DS50 2500 cc V8 | Pirelli |
| Klenk | Meteor | BMW 328 2000 cc L6 | Pirelli |
| Vanwall | Special | 254 2500 cc L4 | Dunlop |
| Kurtis Kraft | 3000 4000 500A 500B 500C |
Offenhauser 4500 cc L4 Offenhauser 4500 cc L4 Offenhauser 4500 cc L4 Offenhauser 4500 cc L4 Offenhauser 4500 cc L4 |
Firestone |
| Stevens | Stevens | Offenhauser 4500 cc L4 | Firestone |
| Schroeder | Schroeder | Offenhauser 4500 cc L4 | Firestone |
| Lesovsky | Lesovsky | Offenhauser 4500 cc L4 | Firestone |
| Bromme | Bromme | Offenhauser 4500 cc L4 | Firestone |
| Kuzma | Kuzma | Offenhauser 4500 cc L4 | Firestone |
| Pankratz | Pankratz | Offenhauser 4500 cc L4 | Firestone |
| Watson | Watson | Offenhauser 4500 cc L4 | Firestone |
| Nichels | Nichels | Offenhauser 4500 cc L4 | Firestone |
| Pawl | Pawl | Offenhauser 4500 cc L4 | Firestone |
| Phillips | Phillips | Offenhauser 4500 cc L4 | Firestone |
 |
| El primer Vanwall portava el radiador sobre el morro. |