| Adams ??? |  | Offenhauser L4 |
| Alfa Romeo 159 |  | Alfa Romeo 158 L8 c |
| Alta GP |  | Alta L4 c |
| Bardazon ??? | | Offenhauser L4 |
| BRM P15 |  | BRM P15 V16 c |
| Bromme ??? |  | Offenhauser L4 |
| Deidt Tuffanelli Derrico |  | Offenhauser L4
@Sparks L6 c |
| EL Special |  | Ford V8 |
| ERA B |  | ERA L6 c |
| ERA B/C |  | ERA L6 c |
| Ewing ??? |  | Offenhauser L4 |
| Ferrari 125 |  | Ferrari 125 V12 c |
| Ferrari 166 |  | Ferrari 166F2 V12 |
| Ferrari 212 |  | Ferrari 375 V12
@Ferrari 212 V12 |
| Ferrari 375 |  | Ferrari 375 V12 |
| Ferrari 375 tw |  | Ferrari 375 V12 |
| Gdula ??? | | Offenhauser L4 |
| Hall ??? |  | Offenhauser L4 |
| HWM 51 |  | Alta L4 c |
| Kurtis Kraft 1000 |  | Offenhauser L4 |
| Kurtis Kraft 2000 |  | Offenhauser L4 |
| Kurtis Kraft 3000 |  | Offenhauser L4 |
| Kurtis Kraft ??? |  | Duray L4 c
@Novi L8 c
@Offenhauser L4 |
| Kuzma Indy Roadster |  | Offenhauser L4 |
| Lesovsky ? |  | Offenhauser L4 |
| Marchese ??? |  | Offenhauser L4 |
| Maserati 4CL |  | Maserati 4CLT L4 c |
| Maserati 4CLT/48 |  | Maserati 4CLT L4 c
@OSCA 4500 V12 |
| Maserati 8CTF |  | Maserati L8 c
@Offenhauser L4
@Offenhauser L4 c |
| Maserati Milano 4CLT/50 |  | Maserati 4CLT L4 c |
| Meyer ??? |  | Novi L8 c |
| Moore ??? |  | Offenhauser L4 |
| Nichels ??? |  | Offenhauser L4 |
| OSCA 4500G |  | OSCA 4500 V12 |
| Pawl ??? |  | Offenhauser L4 |
| Rassey ??? | | Offenhauser L4 |
| Schroeder ??? |  | Offenhauser L4 |
| Scopa ??? |  | Offenhauser L4 |
| Sherman ??? |  | Offenhauser L4 |
| Silnes ??? |  | Chevrolet ???
@Offenhauser L4 |
| Simca Gordini T11 |  | Gordini 16 L4
@Gordini 15C L4 c |
| Simca Gordini T15 |  | Gordini 15C L4 c |
| Stevens ??? |  | Offenhauser L4 |
| Szalai ??? | | Offenhauser L4 |
| Talbot Lago T26C |  | Talbot 23CV L6 |
| Talbot Lago T26C-DA |  | Talbot 23CV L6 |
| Talbot Lago T26C-GS |  | Talbot 23CV L6 |
| Trevis Indycar |  | Offenhauser L4 |
| Veritas Meteor |  | Veritas L6 |
| Watson Indy Roadster |  | Offenhauser L4 |