| Great Britain | 13 May | Nino FarinaFAR | Alfa Romeo | 70 | 2:13:23.600 |
| Monaco | 21 May | Juan Manuel FangioFAN | Alfa Romeo | 100 | 3:13:18.700 |
| Indianapolis | 30 May | Johnnie ParsonsPAR | Kurtis Kraft Offenhauser | 138 | 2:46:55.970 |
| Switzerland | 04 Jun | Nino FarinaFAR | Alfa Romeo | 42 | 2:02:53.700 |
| Belgium | 18 Jun | Juan Manuel FangioFAN | Alfa Romeo | 35 | 2:47:26.000 |
| France | 02 Jul | Juan Manuel FangioFAN | Alfa Romeo | 64 | 2:57:52.800 |
| Italy | 03 Sep | Nino FarinaFAR | Alfa Romeo | 80 | 2:51:17.400 |