| AFM 6 |  | BMW 328 L6
@Bristol BS1 L6 |
| BMW Greifzu |  | BMW 328 L6 |
| BMW Heck |  | BMW 328 L6 |
| Bromme ??? |  | Offenhauser L4 |
| Christy ??? | | Offenhauser L4 |
| Clemons ??? | | Offenhauser L4 |
| Connaught A |  | Lea Francis L4 |
| Cooper Special |  | Alta F2 L4 |
| Cooper T20 |  | Bristol BS1 L6 |
| Cooper T23 |  | Alta F2 L4
@Bristol BS1 L6 |
| Cooper T24 |  | Alta F2 L4 |
| Deidt Tuffanelli Derrico |  | Offenhauser L4 |
| Del Roy ??? |  | Offenhauser L4 |
| EMW R2 |  | EMW 6 L6 |
| Ewing D |  | Offenhauser L4 |
| Ferrari 166 |  | Ferrari 125 V12 |
| Ferrari 500 |  | Ferrari 500 L4 |
| Ferrari 553 |  | Ferrari 553 L4 |
| Gordini T16 |  | Gordini 20 L6 |
| HWM 53 |  | Alta F2 L4 |
| Johnson ??? |  | Wayne L6 |
| Kurtis Kraft ??? |  | Novi L8 c
@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 |  | Chrysler V8
@Offenhauser L4 |
| Kurtis Kraft 500B |  | Cadillac V8
@Offenhauser L4 |
| Kuzma Indy Roadster |  | Offenhauser L4 |
| Lesovsky ? |  | Offenhauser L4 |
| Maserati 8CTF |  | Maserati L8 c
@Offenhauser L4 |
| Maserati A6GCM |  | Maserati A6 L6 |
| Moore ??? |  | Offenhauser L4 |
| MSM Lancia |  | Lancia V6 |
| OSCA 20 |  | OSCA 2000 L6 |
| Pankratz D |  | Offenhauser L4 |
| Pawl ??? |  | Offenhauser L4 |
| Schroeder ??? |  | Offenhauser L4 |
| Silnes ??? |  | Offenhauser L4 |
| Simca Gordini T15 |  | Gordini 1500 L4 |
| Snowberger ??? |  | Offenhauser L4 |
| Stevens ??? |  | Offenhauser L4 |
| Trevis Indycar |  | Offenhauser L4 |
| Turner ??? |  | Offenhauser L4 |
| Veritas Meteor |  | Veritas L6 |
| Veritas RS |  | Veritas L6 |
| Voelker ??? | | Voelker ??? |
| Watson Indy Roadster |  | Offenhauser L4 |