| AFM 6 |  | BMW 328 L6
@Küchen V8 |
| Alta F2 |  | Alta F2 L4 |
| Aston NB41 |  | Butterworth F4 |
| BMW Eigenbau |  | BMW 328 L6 |
| BMW Greifzu |  | BMW 328 L6 |
| BMW Heck |  | BMW 328 L6 |
| BMW Speciale |  | BMW 328 L6 |
| Bromme ??? |  | Offenhauser L4 |
| Cisitalia D46 |  | BPM L4 |
| Connaught A |  | Lea Francis L4 |
| Cooper T20 |  | Bristol BS1 L6 |
| Deidt Tuffanelli Derrico |  | Offenhauser L4 |
| ERA G |  | Bristol BS1 L6 |
| Ewing ??? |  | Offenhauser L4 |
| Ferrari 125 |  | Ferrari 125 V12 |
| Ferrari 166 |  | Ferrari 166F2 V12 |
| Ferrari 212 |  | Ferrari 125 V12 |
| Ferrari 375S |  | Ferrari 375 V12 |
| Ferrari 500 |  | Ferrari 500 L4 |
| Frazer Nash 421 |  | BMW 328 L6
@Bristol BS1 L6 |
| Frazer Nash FN48 |  | Bristol BS1 L6 |
| Gordini T16 |  | Gordini 20 L6 |
| Gordini T16S |  | Gordini 20 L6 |
| HWM 51 |  | Alta F2 L4 |
| HWM 52 |  | Alta F2 L4 |
| Koehnle ??? |  | Offenhauser L4 |
| Kurtis Kraft 1000 |  | Offenhauser L4 |
| Kurtis Kraft 2000 |  | Offenhauser L4 |
| Kurtis Kraft 3000 |  | Offenhauser L4 |
| Kurtis Kraft 4000 |  | Offenhauser L4 |
| Kurtis Kraft 500A |  | Offenhauser L4 |
| Kurtis Kraft ??? |  | Cadillac V8
@Cummins L6 c
@Novi L8 c
@Offenhauser L4
@Offenhauser L4 c |
| Kuzma Indy Roadster |  | Offenhauser L4
@Studebaker V8 |
| Lesovsky ? |  | Offenhauser L4 |
| Maserati 4CLT |  | Maserati Plate L4 |
| Maserati 8CTF |  | Offenhauser L4
@Offenhauser L4 c |
| Maserati A6GCM |  | Maserati A6 L6 |
| Meyer ??? |  | Offenhauser L4 |
| OSCA 20 |  | OSCA 2000 L6 |
| Pankratz D |  | Offenhauser L4 |
| Pawl ??? |  | Offenhauser L4 |
| R Miller Special |  | R Miller L4 c |
| Rae ??? |  | Offenhauser L4 |
| Schroeder ??? |  | Offenhauser L4 |
| Scopa ??? |  | Offenhauser L4 |
| Sherman ??? |  | Offenhauser L4 |
| Simca Gordini T11 |  | Gordini 1500 L4 |
| Simca Gordini T15 |  | Gordini 1500 L4 |
| Snowberger ??? |  | Offenhauser L4 |
| Stevens ??? |  | Offenhauser L4 |
| Trevis Indycar |  | Offenhauser L4 |
| Veritas Meteor |  | Veritas L6 |
| Veritas RS |  | Veritas L6 |
| Watson Indy Roadster |  | Offenhauser L4 |