| Switzerland | 27 May | Juan Manuel FangioFAN | Alfa Romeo | 42 | 2:07:53.640 |
| Indianapolis | 30 May | Lee WallardWAL | Kurtis Kraft Offenhauser | 200 | 3:57:38.050 |
| Belgium | 17 Jun | Nino FarinaFAR | Alfa Romeo | 36 | 2:45:46.200 |
| France | 01 Jul | Juan Manuel FangioFAN | Alfa Romeo | 77 | 3:22:11.000 |
| France | 01 Jul | Luigi FagioliFAG | Alfa Romeo | | |
| Great Britain | 14 Jul | Jose Froilan GonzalezGON | Ferrari | 90 | 2:42:18.200 |
| Germany | 29 Jul | Alberto AscariASC | Ferrari | 20 | 3:23:03.300 |
| Italy | 16 Sep | Alberto AscariASC | Ferrari | 80 | 2:42:39.300 |
| Spain | 28 Oct | Juan Manuel FangioFAN | Alfa Romeo | 70 | 2:46:54.100 |