Total de marques participants: 24 (9 a Indianapolis)
Total de models participants: 43 (14 a Indianapolis)
Total de motors participants: 16 (3 a Indianapolis)
Total de pneumàtics participants: 4 (Pirelli, Dunlop, Englebert i Firestone)
Debutants: 7 (AFM, Aston, BMW, Cisitalia, Connaught, Frazer Nash)
Última temporada: 6 (Alta, Aston, Cisitalia, Deidt, Frazer Nash, Sherman)
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| Alberto Ascari va participar amb un Ferrari 375S a Indianapolis. |
| Marca | Model | Motor | Pneumàtics |
| Cooper | T20 |
Bristol BS1 2000 cc L6
|
Dunlop |
| Ferrari | 125/F2 166/F2 212 375S 500 |
125 1500 cc V12 125 1500 cc V12 125 1500 cc V12 375 F1 4500 cc V12 500 2000 cc L4 |
Dunlop Pirelli Pirelli Firestone Pirelli |
| Connaught | A | Lea Francis 2000 cc L4 | Dunlop |
| Maserati | 4CLT-48 A6GCM |
Platé 2000 cc L4 A6 2000 cc L6 |
Pirelli Pirelli |
| Simca-Gordini Gordini |
T11 T15 T16 T16S |
15C 1500 L4 S 15C 1500 cc L4 S 20 2000 cc L6 20 2000 cc L6 |
Englebert |
| Frazer Nash | FN48 421 |
Bristol BS1 2000 cc L6 BMW 328 2000 cc L6 |
Dunlop |
| ERA | G | Bristol BS1 2000 cc L6 | Dunlop |
| Alta | F2 | F2 2000 cc L4 | Dunlop |
| HWM | 51 51/52 52 |
Alta F2 2000 cc L4 | Dunlop |
| Aston | NB41 | Butterworth 2000 cc F4 | Dunlop |
| OSCA | 20 | 2000 2000 cc L6 | Pirelli |
| Cisitalia | D46 | BPM 2000 cc L4 | Pirelli |
| Veritas | Meteor RS |
2000 cc L6 | Dunlop Englebert |
| AFM | AFM 6 8 |
Küchen 2000 cc V8 BMW 328 2000 cc L6 BMW 328 2000 cc L6 |
Dunlop Englebert |
| BMW | Eigenbau | 328 2000 cc L6 | Dunlop Englebert |
| Kurtis Kraft | 2000 3000 4000 4000 500A – – |
Offenhauser 4500 cc L4 Offenhauser 4500 cc L4 Offenhauser 4500 cc L4 Offenhauser 3000 cc L4 S Offenhauser 4500 cc L4 Novi 3000 cc L8 S Cummins 3000 cc L6 C D |
Firestone |
| Stevens | Stevens | Offenhauser 4500 cc L4 | Firestone |
| Deidt | Deidt | 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 |
| Sherman | Sherman | Offenhauser 4500 cc L4 | Firestone |
| Watson | Watson | Offenhauser 4500 cc L4 | Firestone |
| Trevis | Trevis | Offenhauser 4500 cc L4 | Firestone |
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| El Kurtis Kraft-Cummins és fins a la data l’únic cotxe diesel en aconseguir la pole position en un GP (i a les 500 milles, també). |