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| Nr | Driver | Team | Car | Engine | Tyre | 
|---|---|---|---|---|---|
| 2 |  Giuseppe Farina | Giuseppe Farina |  Maserati 4CLT/48 [1609] | Maserati 4CL L4C 1.7 | - | 
| 4 |  Philippe Étancelin | Philippe Étancelin |  Talbot-Lago T26C [110008] | Talbot 23 CV L6 4.5 | - | 
| 6 |  Benedicto Campos | Automovil Club Argentino |  Ferrari 166 FL [011F] | Ferrari 166 FL V12C 2.0 | - | 
| 8 |  José Froilán González | José F. González |  Maserati 4CLT/48 [1600] | Maserati 4CL L4C 1.5 | - | 
| 10 |  Dorino Serafini | Scuderia Ferrari |  Ferrari 125 [04C] | Ferrari 125 V12C 1.5 | - | 
| 12 |  Alberto Ascari | Scuderia Ferrari |  Ferrari 166 FL [125-C-01] | Ferrari 166 FL V12C 2.0 | - | 
| 14 |  Reg Parnell | Scuderia Ambrosiana |  Maserati 4CLT/48 [1596] | Maserati 4CL L4C 1.5 | - | 
| 16 |  Juan Manuel Fangio | Automovil Club Argentino |  Ferrari 166 FL [013F] | Ferrari 166 FL V12C 2.0 | - | 
| 18 |  Pascual Puópolo | San Isidoro |  Maserati 4CLT/48 [1605] | Maserati 4CL L4C 1.5 | - | 
| 20 |  Clemar Bucci | C. Bucci |  Alfa Romeo 12C-37 [51204] | Alfa Romeo 12C L12C 4.5 | - | 
| 22 |  Piero Taruffi | P. Taruffi |  Maserati 4CLT/48 [1610] | Maserati 4CL L4C 1.7 | - | 
| 26 |  Eitel Cantoni | E. Cantoni |  Maserati 4CM [1559] | Maserati 4CM L4C 1.5 | - | 
| 28 |  Clemente Biondetti | L. de Filippis |  Maserati 4CLT/48 [1603] | Maserati 4CL L4C 1.7 | - | 
| 30 |  Emmanuel de Graffenried | Enrico Platé |  Maserati 4CLT/48 [1601] | Maserati 4CL L4C 1.7 | - | 
| 32 |  Felice Bonetto | Scuderia Milan |  Maserati 4CLT/50 [1612] | Speluzzi 4CL L4C 1.5 | - | 
| 36 |  Piero Carini | P. Carini |  Maserati 4CLT/48 [1608] | Maserati 4CL L4C 1.5 | - | 
| 44 |  Luigi Villoresi | Scuderia Ferrari |  Ferrari 166 FL [125-C-02] | Ferrari 166 FL V12C 2.0 | - | 
| 48 |  Ernesto Nanni | E. Nanni |  Maserati 4CL | Maserati 4CL L4C 1.5 | - | 
| Official Name | IV Copa de Acción San Lorenzo | 
|---|---|
| Circuit | Parque Independencia | 
| Date | January 22 | 
| Pole | Juan Manuel Fangio 01:43.100 | 
| Fastest Lap | Juan Manuel Fangio 01:43.600 | 
| Podium | 1st Luigi Villoresi (30) , 2nd Benedicto Campos (4) , 3rd Giuseppe Farina | 
| Prev race | Gran Premio General San Martín January 15 | 
| Next race | Richmond Trophy April 10 | 
| P | N | Driver | Team | Car | Engine | Tyre | Time | Laps | FL | Led | Gr | Pts | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 44 |  Luigi Villoresi | Scuderia Ferrari |  Ferrari 166 FL [125-C-02] | Ferrari 166 FL V12C 2.0 | - | 01:30:51.600 | 50 | 30 | 5 | 0 | |
| 2 | 6 |  Benedicto Campos | Automovil Club Argentino |  Ferrari 166 FL [011F] | Ferrari 166 FL V12C 2.0 | - | 01:32:14.500 | 50 | 4 | 6 | 0 | |
| 3 | 2 |  Giuseppe Farina | Giuseppe Farina |  Maserati 4CLT/48 [1609] | Maserati 4CL L4C 1.7 | - | +1 lap | 49 | 0 | 3 | 0 | |
| 4 | 14 |  Reg Parnell | Scuderia Ambrosiana |  Maserati 4CLT/48 [1596] | Maserati 4CL L4C 1.5 | - | +2 laps | 48 | 0 | 10 | 0 | |
| 5 | 20 |  Clemar Bucci | C. Bucci |  Alfa Romeo 12C-37 [51204] | Alfa Romeo 12C L12C 4.5 | - | +3 laps | 47 | 0 | 17 | 0 | |
| 6 | 4 |  Philippe Étancelin | Philippe Étancelin |  Talbot-Lago T26C [110008] | Talbot 23 CV L6 4.5 | - | +3 laps | 47 | 0 | 11 | 0 | |
| 7 | 8 |  José Froilán González | José F. González |  Maserati 4CLT/48 [1600] | Maserati 4CL L4C 1.5 | - | +3 laps | 47 | 0 | 13 | 0 | |
| 8 | 26 |  Eitel Cantoni | E. Cantoni |  Maserati 4CM [1559] | Maserati 4CM L4C 1.5 | - | +3 laps | 47 | 0 | 14 | 0 | |
| 9 | 30 |  Emmanuel de Graffenried | Enrico Platé |  Maserati 4CLT/48 [1601] | Maserati 4CL L4C 1.7 | - | +3 laps | 47 | 0 | 7 | 0 | |
| 10 | 18 |  Pascual Puópolo | San Isidoro |  Maserati 4CLT/48 [1605] | Maserati 4CL L4C 1.5 | - | +6 laps | 44 | 0 | 15 | 0 | |
| DNF | 16 |  Juan Manuel Fangio | Automovil Club Argentino |  Ferrari 166 FL [013F] | Ferrari 166 FL V12C 2.0 | - | Engine | 16 | 01:43.600 | 16 | 1 | 0 | 
| DNF | 10 |  Dorino Serafini | Scuderia Ferrari |  Ferrari 125 [04C] | Ferrari 125 V12C 1.5 | - | DNF | 16 | 0 | 16 | 0 | |
| DNF | 28 |  Clemente Biondetti | L. de Filippis |  Maserati 4CLT/48 [1603] | Maserati 4CL L4C 1.7 | - | DNF | 13 | 0 | 12 | 0 | |
| DNF | 12 |  Alberto Ascari | Scuderia Ferrari |  Ferrari 166 FL [125-C-01] | Ferrari 166 FL V12C 2.0 | - | Clutch | 12 | 0 | 2 | 0 | |
| DNF | 36 |  Piero Carini | P. Carini |  Maserati 4CLT/48 [1608] | Maserati 4CL L4C 1.5 | - | DNF | 5 | 0 | 9 | 0 | |
| DNF | 22 |  Piero Taruffi | P. Taruffi |  Maserati 4CLT/48 [1610] | Maserati 4CL L4C 1.7 | - | Mechanical | 2 | 0 | 4 | 0 | |
| DNF | 32 |  Felice Bonetto | Scuderia Milan |  Maserati 4CLT/50 [1612] | Speluzzi 4CL L4C 1.5 | - | DNF | 0 | 0 | 8 | 0 | |
| DNS | 48 |  Ernesto Nanni | E. Nanni |  Maserati 4CL | Maserati 4CL L4C 1.5 | - | DNS | 0 | 0 | 0 | 
| Year | Official Name | Circuit | Date | Winning Driver | Team | Laps | Time | Formula | 
|---|---|---|---|---|---|---|---|---|
| 1950 | IV Copa de Acción San Lorenzo | Parque Independencia | January 22 |  Luigi Villoresi |  Ferrari | 50 | 01:30:51.600 | F1EC | 
| 1949 | III Copa de Acción San Lorenzo | Parque Independencia | February 13 |  Giuseppe Farina |  Ferrari | 50 | 01:48:18.800 | GP | 
| 1948 | II Copa de Acción San Lorenzo | Parque Independencia | February 1 |  Jean-Pierre Wimille |  Simca Gordini | 50 | 01:32:27.300 | GP | 
| 1947 | I Copa de Acción San Lorenzo | Parque Independencia | March 2 |  Achille Varzi |  Alfa Romeo | 50 | 01:33:03.600 | GP | 
| Driver | Races | 1st | 2nd | 3rd | Podiums | Poles | Fastest | Avg Grid | Avg Pos | Points | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  Luigi Villoresi | 4 | 1 | 1 | 1 | 3 | 2 | 1 | 2.5 | 2.5 | 0 | 
| 2 |  Giuseppe Farina | 3 | 1 | 0 | 1 | 2 | 0 | 0 | 3.0 | 5.0 | 0 | 
| 3 |  Jean-Pierre Wimille | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 5.0 | 1.0 | 0 | 
| 4 |  Achille Varzi | 2 | 1 | 0 | 0 | 1 | 0 | 0 | 6.0 | 6.5 | 0 | 
| 5 |  Chico Landi | 2 | 0 | 1 | 0 | 1 | 0 | 0 | 5.5 | 3.0 | 0 | 
| 6 |  Reg Parnell | 2 | 0 | 1 | 0 | 1 | 0 | 0 | 9.5 | 3.0 | 0 | 
| 7 |  Benedicto Campos | 3 | 0 | 1 | 0 | 1 | 0 | 0 | 9.7 | 7.3 | 0 | 
| 8 |  Alberto Ascari | 2 | 0 | 0 | 1 | 1 | 0 | 0 | 2.5 | 8.5 | 0 | 
| 9 |  Óscar Alfredo Gálvez | 3 | 0 | 0 | 1 | 1 | 1 | 0 | 3.0 | 6.3 | 0 | 
| 10 |  Prince Bira | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 6.0 | 10.0 | 0 | 
| 11 |  Pablo Pessatti | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 3.0 | 13.0 | 0 | 
| 12 |  Felice Bonetto | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 8.0 | 17.0 | 0 | 
| 13 |  Raph (Georges Raphaël) | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 7.0 | 11.0 | 0 | 
| 14 |  Piero Carini | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 9.0 | 15.0 | 0 | 
| 15 |  Ernesto Nanni | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 12.0 | 9.0 | 0 | 
| 16 |  Clemente Biondetti | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 12.0 | 13.0 | 0 | 
| 17 |  Emmanuel de Graffenried | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 7.0 | 9.0 | 0 | 
| 18 |  José Froilán González | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 13.0 | 7.0 | 0 | 
| 19 |  Adriano Malusardi | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 5.0 | 11.0 | 0 | 
| 20 |  Giacomo Palmieri | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 8.0 | 12.0 | 0 | 
| 21 |  Piero Taruffi | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 4.0 | 16.0 | 0 | 
| 22 |  Mario Sessarego | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 14.0 | 10.0 | 0 | 
| 23 |  Juan Gálvez | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 10.0 | 5.0 | 0 | 
| 24 |  Dorino Serafini | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 16.0 | 12.0 | 0 | 
| 25 |  Andrés Fernandez | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 12.0 | 7.0 | 0 | 
| 26 |  Pascual Puópolo | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 15.0 | 10.0 | 0 | 
| 27 |  Philippe Étancelin | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 11.0 | 6.0 | 0 | 
| 28 |  Ernesto Tornquist | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 12.0 | 12.0 | 0 | 
| 29 |  Ítalo Bizio | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 6.5 | 7.0 | 0 | 
| 30 |  Victorio Rosa | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 9.0 | 11.5 | 0 | 
| 31 |  Pedro Llano | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 9.0 | 9.0 | 0 | 
| 32 |  Clemar Bucci | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 12.3 | 7.0 | 0 | 
| 33 |  Eitel Cantoni | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 12.0 | 6.3 | 0 | 
| 34 |  Juan Manuel Fangio | 4 | 0 | 0 | 0 | 0 | 1 | 2 | 6.8 | 8.3 | 0 | 
| Team | Races | 1st | 2nd | 3rd | Podiums | Poles | Fastest | Avg Grid | Avg Pos | Points | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  Ferrari | 3 | 2 | 1 | 0 | 2 | 1 | 1 | 5.3 | 6.8 | 0 | 
| 2 |  Alfa Romeo | 4 | 1 | 1 | 1 | 2 | 1 | 0 | 6.3 | 6.5 | 0 | 
| 3 |  Simca Gordini | 2 | 1 | 0 | 0 | 1 | 0 | 1 | 7.0 | 5.5 | 0 | 
| 4 |  Maserati | 4 | 0 | 2 | 3 | 4 | 2 | 1 | 8.0 | 8.6 | 0 | 
| 5 |  Ford | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 11.0 | 6.0 | 0 | 
| 6 |  Chevrolet | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 14.0 | 10.0 | 0 | 
| 7 |  Rosa | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 12.0 | 9.0 | 0 | 
| 8 |  Talbot-Lago | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 11.0 | 6.0 | 0 | 
| 9 |  Cadillac | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 13.0 | 7.0 | 0 | 
| 10 |  Willys | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 15.0 | 15.0 | 0 |