III Gran Premio de San Sebastián
No qualifying session
Race Result
Race Result
Did Not Start
| # | Driver | Entrant / Team | Chassis | |
|---|---|---|---|---|
| 10 | 
Emilio Materassi | SA Diatto | Diatto 20S | |
| 11 |
Caberto Conelli | Sunbeam | Sunbeam | |
| 13 | 
Louis Wagner | Automobiles Delage | Delage 2LCV | Reserve |
| 2 |
Alfieri Maserati | SA Diatto | Diatto 20S | |
| 3 | 
Vladimir Racowski | Etablissements Ballot | Ballot 2LS | |
| 7 | 
Henry Segrave | Sunbeam | Sunbeam |