EntrantsGridGrand Prix
| Pos | Nr | Driver | Car | Engine | Tyre | Time | Laps |
|---|---|---|---|---|---|---|---|
| 1 | 32 |  Luigi Villoresi |
Maserati 4CLT/48 [1594] |
Maserati 4CL L4C 1.5 | – | 02:07.200 | 0 |
| 2 | 24 |  Juan Manuel Fangio |
Maserati 4CLT/48 [1599] |
Maserati 4CL L4C 1.5 | – | 0 | |
| 3 | 2 | Alberto Ascari |
Maserati 4CLT/48 [1593] |
Maserati 4CL L4C 1.5 | – | 0 | |
| 4 | 34 | Giuseppe Farina |
Ferrari 166C [04C] |
Ferrari 166C V12 2.0 | – | 0 |
| Official Name | II Gran Premio Internacional General San Martín |
|---|---|
| Circuit | El Torreón |
| Date | February 27 |
| Pole | Luigi Villoresi 02:07.200 |
| Fastest Lap | Luigi Villoresi 02:05.100 |
| Podium | 1st Juan Manuel Fangio, 2nd Prince Bira, 3rd Óscar Alfredo Gálvez |
| Prev race | Copa de Acción San Lorenzo February 13 |
| Next race | Grande Prêmio de São Paulo March 20 |
| P | N | Driver | Team | Car | Engine | Tyre | Time | Laps | FL | Gr | Pts |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 24 | Juan Manuel Fangio |
Automovil Club Argentino | Maserati 4CLT/48 [1599] |
Maserati 4CL L4C 1.5 | – | 01:16:31.300 | 35 | 2 | 0 | |
| 2 | 8 |  Prince Bira |
White Mouse | Maserati 4CLT/48 [1598] |
Maserati 4CL L4C 1.5 | – | +1 lap | 34 | 0 | ||
| 3 | 6 | Óscar Alfredo Gálvez |
O. Gálvez | Alfa Romeo Tipo 308 [50017] |
Alfa Romeo L8C 3.8 | – | +2 laps | 33 | 0 | ||
| 4 | 38 | Ítalo Bizio |
Italo Bizio | Alfa Romeo 8C-2900A [412002] |
Alfa Romeo L8C 2.9 | – | +4 laps | 31 | 0 | ||
| 5 | 30 | Andrés Fernandez |
A. Fernandez | Maserati 6CM |
Maserati 6CM L6C 1.5 | – | +4 laps | 31 | 0 | ||
| 6 | 26 | Ernesto Tornquist |
E. Tornquist | Maserati 4CL [1570] |
Maserati 4CL L4C 1.5 | – | +5 laps | 30 | 0 | ||
| 7 | 2 | Alberto Ascari |
Scuderia Ambrosiana | Maserati 4CLT/48 [1593] |
Maserati 4CL L4C 1.5 | – | DNF | 27 | 3 | 0 | |
| 8 | 32 | Luigi Villoresi |
Scuderia Ambrosiana | Maserati 4CLT/48 [1594] |
Maserati 4CL L4C 1.5 | – | DNF | 23 | 02:05.100 | 1 | 0 |
| DNF | 12 | Victorio Rosa |
V. Rosa | Maserati 6CM [1562] |
Maserati 6CM L6C 1.5 | – | DNF | 11 | 0 | ||
| DNF | 34 | Giuseppe Farina |
Scuderia Ferrari | Ferrari 166C [04C] |
Ferrari 166C V12 2.0 | – | Oil leak | 8 | 4 | 0 | |
| DNF | 18 |  Eitel Cantoni |
E. Cantoni | Maserati 6CM/4C [1559] |
Maserati 4CM L4C 1.5 | – | DNF | 7 | 0 | ||
| DNF | 28 |  Reg Parnell |
Scuderia Ambrosiana | Maserati 4CLT/48 [1596] |
Maserati 4CL L4C 1.5 | – | DNF | 2 | 0 | ||
| DNF | 20 | Benedicto Campos |
Automovil Club Argentino | Maserati 4CL [1580] |
Maserati 4CL L4C 1.5 | – | DNF | 0 | 0 | ||
| DNS | 4 | Adriano Malusardi |
A. Malusardi | Alfa Romeo Tipo B/P3 [50009] |
Alfa Romeo L8C 2.9 | – | Fatal accident | 0 | 0 |