Parque Independencia, Rosario
Circuit Type: Temporary street circuit
Original Layout
Extension: 2,811 Km
Lap Record: 1:43.600
Year: 1950
Driver: Juan Manuel Fangio
Car: Ferrari 166 FL
Speed: 97,679 km/h
Pole Record: 1:42.000
Year: 1949
Driver: Luigi Villoresi
Car: Maserati 4CLT
Speed: 99,211 km/h
| Year | Official Name | Date | Winning Driver | Constructor | Laps | Time | Formula |
|---|---|---|---|---|---|---|---|
| 1950 | IV Copa de Acción San Lorenzo | January 22 |  Luigi Villoresi |
Ferrari |
50 |
01:30:51.600 | F1EC |
| 1949 | III Copa de Acción San Lorenzo | February 13 | Giuseppe Farina |
Ferrari |
50 |
01:48:18.800 | GP |
| 1948 | II Copa de Acción San Lorenzo | February 1 |  Jean-Pierre Wimille |
Simca Gordini |
50 |
01:32:27.300 | GP |
| 1947 | I Copa de Acción San Lorenzo | March 2 | Achille Varzi |
Alfa Romeo |
50 |
01:33:03.600 | GP |