EntrantsGridGrand Prix
| Nr | Driver | Team | Car | Engine | Tyre | 
|---|---|---|---|---|---|
| 2 |  Alberto Ascari | Scuderia Ambrosiana |  Maserati 4CLT/48 [1593] | Maserati 4CL L4C 1.5 | - | 
| 4 |  Adriano Malusardi | Automovil Club Argentino |  Maserati 4CLT/48 [1600] | Maserati 4CL L4C 1.5 | - | 
| 6 |  Óscar Alfredo Gálvez | O. Gálvez |  Alfa Romeo Tipo 308 [50017] | Alfa Romeo L8C 3.8 | - | 
| 8 |  Prince Bira | White Mouse |  Maserati 4CLT/48 [1598] | Maserati 4CL L4C 1.5 | - | 
| 10 |  Pedro Llano | P. Llano |  Maserati 6CM | Maserati 6CM L6C 1.5 | - | 
| 12 |  Victorio Rosa | V. Rosa |  Maserati 6CM [1562] | Maserati 6CM L6C 1.5 | - | 
| 14 |  Clemar Bucci | C. Bucci |  Alfa Romeo 12C-37 [51204] | Alfa Romeo 12C L12C 4.5 | - | 
| 16 |  Jean-Pierre Wimille | Equipe SIMCA-Gordini |  Simca Gordini T15 [10GC] | Gordini T15 L4 1.4 | - | 
| 18 |  Eitel Cantoni | E. Cantoni |  Maserati 4CM [1559] | Maserati 4CM L4C 1.5 | - | 
| 20 |  Benedicto Campos | Automovil Club Argentino |  Maserati 4CL [1580] | Maserati 4CL L4C 1.5 | - | 
| 22 |  Pascual Puópolo | San Isidoro |  Maserati 8CL [3034] | Maserati 8CL L8C 3.0 | - | 
| 24 |  Juan Manuel Fangio | Automovil Club Argentino |  Maserati 4CLT/48 [1599] | Maserati 4CL L4C 1.5 | - | 
| 26 |  Ernesto Tornquist | E. Tornquist |  Maserati 4CL [1570] | Maserati 4CL L4C 1.5 | - | 
| 28 |  Reg Parnell | Scuderia Ambrosiana |  Maserati 4CLT/48 [1596] | Maserati 4CL L4C 1.5 | - | 
| 30 |  Andrés Fernandez | A. Fernandez |  Maserati 6CM | Maserati 6CM L6C 1.5 | - | 
| 32 |  Luigi Villoresi | Scuderia Ambrosiana |  Maserati 4CLT/48 [1594] | Maserati 4CL L4C 1.5 | - | 
| 34 |  Giuseppe Farina | Scuderia Ferrari |  Ferrari 125 [04C] | Ferrari 125 V12C 1.5 | - | 
| 36 |  Amédée Gordini | Equipe SIMCA-Gordini |  Simca Gordini T15 [7GC] | Gordini T15 L4 1.4 | - | 
| Official Name | III Gran Premio Juan Perón y de la Ciudad de Buenos Aires | 
|---|---|
| Circuit | Palermo | 
| Date | January 30 | 
| Pole | Alberto Ascari 02:36.800 | 
| Fastest Lap | Alberto Ascari 02:32.400, Luigi Villoresi 02:32.400 | 
| Podium | 1st Alberto Ascari (34) , 2nd Luigi Villoresi, 3rd Óscar Alfredo Gálvez | 
| Prev race | Gran Premio Peña Rhin October 31 | 
| Next race | Gran Premio Eva Perón February 6 | 
| P | N | Driver | Team | Car | Engine | Tyre | Time | Laps | FL | Led | Gr | Pts | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 |  Alberto Ascari | Scuderia Ambrosiana |  Maserati 4CLT/48 [1593] | Maserati 4CL L4C 1.5 | - | 01:30:23.100 | 35 | 02:32.400 | 34 | 1 | 0 | 
| 2 | 32 |  Luigi Villoresi | Scuderia Ambrosiana |  Maserati 4CLT/48 [1594] | Maserati 4CL L4C 1.5 | - | 01:31:04.100 | 35 | 02:32.400 | 0 | 2 | 0 | 
| 3 | 6 |  Óscar Alfredo Gálvez | O. Gálvez |  Alfa Romeo Tipo 308 [50017] | Alfa Romeo L8C 3.8 | - | 01:32:55.000 | 35 | 0 | 12 | 0 | |
| 4 | 24 |  Juan Manuel Fangio | Automovil Club Argentino |  Maserati 4CLT/48 [1599] | Maserati 4CL L4C 1.5 | - | +1 lap | 34 | 0 | 3 | 0 | |
| 5 | 8 |  Prince Bira | White Mouse |  Maserati 4CLT/48 [1598] | Maserati 4CL L4C 1.5 | - | +4 laps | 31 | 0 | 5 | 0 | |
| 6 | 12 |  Victorio Rosa | V. Rosa |  Maserati 6CM [1562] | Maserati 6CM L6C 1.5 | - | +6 laps | 29 | 0 | 11 | 0 | |
| DNF | 4 |  Adriano Malusardi | Automovil Club Argentino |  Maserati 4CLT/48 [1600] | Maserati 4CL L4C 1.5 | - | DNF | 25 | 0 | 4 | 0 | |
| DNF | 34 |  Giuseppe Farina | Scuderia Ferrari |  Ferrari 125 [04C] | Ferrari 125 V12C 1.5 | - | Turbo | 20 | 0 | 13 | 0 | |
| DNF | 20 |  Benedicto Campos | Automovil Club Argentino |  Maserati 4CL [1580] | Maserati 4CL L4C 1.5 | - | DNF | 6 | 1 | 6 | 0 | |
| DNF | 28 |  Reg Parnell | Scuderia Ambrosiana |  Maserati 4CLT/48 [1596] | Maserati 4CL L4C 1.5 | - | Engine | 4 | 0 | 8 | 0 | |
| DNF | 26 |  Ernesto Tornquist | E. Tornquist |  Maserati 4CL [1570] | Maserati 4CL L4C 1.5 | - | DNF | 4 | 0 | 10 | 0 | |
| DNF | 18 |  Eitel Cantoni | E. Cantoni |  Maserati 4CM [1559] | Maserati 4CM L4C 1.5 | - | Brakes | 0 | 0 | 7 | 0 | |
| DNF | 22 |  Pascual Puópolo | San Isidoro |  Maserati 8CL [3034] | Maserati 8CL L8C 3.0 | - | DNF | 0 | 0 | 9 | 0 | |
| DNF | 30 |  Andrés Fernandez | A. Fernandez |  Maserati 6CM | Maserati 6CM L6C 1.5 | - | DNF | 0 | 0 | 14 | 0 | |
| DNS | 16 |  Jean-Pierre Wimille | Equipe SIMCA-Gordini |  Simca Gordini T15 [10GC] | Gordini T15 L4 1.4 | - | Fatal accident | 0 | 0 | 0 | ||
| DNA | 36 |  Amédée Gordini | Equipe SIMCA-Gordini |  Simca Gordini T15 [7GC] | Gordini T15 L4 1.4 | - | DNF | 0 | 0 | 0 | ||
| DNA | 10 |  Pedro Llano | P. Llano |  Maserati 6CM | Maserati 6CM L6C 1.5 | - | DNA | 20 | 0 | 0 | ||
| DNA | 14 |  Clemar Bucci | C. Bucci |  Alfa Romeo 12C-37 [51204] | Alfa Romeo 12C L12C 4.5 | - | DNA | 0 | 0 | 0 |