MediaEntrantsGridGrand Prix
| Pos | Nr | Driver | Car | Engine | Tyre | Time | Laps |
|---|---|---|---|---|---|---|---|
| 1 | 32 |  Luigi Villoresi |
Maserati 4CLT/48 [1594] |
Maserati 4CL L4C 1.5 | – | 07:02.900 | 0 |
| 2 | 36 | Giuseppe Farina |
Ferrari 166C [04C] |
Ferrari 166C V12 2.0 | – | 07:23.100 | 0 |
| 3 | 2 |  Chico Landi |
Maserati 4CL |
Maserati 4CL L4C 1.5 | – | 07:35.400 | 0 |
| 4 | 22 | Alberto Ascari |
Maserati 4CLT/48 [1593] |
Maserati 4CL L4C 1.5 | – | 07:36.000 | 0 |
| 5 | 40 | Henrique Casini |
Alfa Romeo Tipo 308 [50016] |
Alfa Romeo L8C 3.0 | – | 07:41.900 | 0 |
| 6 | 8 | Francisco Marques |
Maserati 4CL |
Maserati 4CL L4C 1.5 | – | 07:52.500 | 0 |
| 7 | 30 | Aloysio Fontenelle |
Alfa Romeo 8C-2300 Monza [2211135] |
Alfa Romeo L8C 2.3 | – | 08:06.200 | 0 |
| 8 | 26 | Rodrigo Miranda |
Maserati A6GCS [2001] |
Maserati A6G L6 2.0 | – | 08:22.400 | 0 |
| 9 | 28 | Annuar de Góes |
Maserati 6CM |
Maserati 6CM L6C 1.5 | – | 0 | |
| 10 | 16 |  Antonio Fernandes da Silva |
Maserati 4CL |
Maserati 4CL L4C 1.5 | – | 0 | |
| 11 | 14 | Domingos Lopes |
 Bugatti Type 51 [‘II’] |
Bugatti L8C 2.3 | – | 0 | |
| 12 | 10 | Carlos Barbosa |
Maserati 8CM |
Maserati 8CM L8C 3.0 | – | 0 | |
| 13 | 38 | Nino Estefanini |
Alfa Romeo 8C-2300 Monza [2211138] |
Alfa Romeo L8C 2.3 | – | 0 |
| Official Name | 10º Grande Prêmio da Cidade do Rio de Janeiro |
|---|---|
| Circuit | Gávea |
| Date | March 27 |
| Pole | Luigi Villoresi 07:02.900 |
| Fastest Lap | Alberto Ascari 07:21.700 |
| Podium | 1st Luigi Villoresi (6) , 2nd Giuseppe Farina, 3rd Francisco Marques |
| Prev race | Grande Prêmio de São Paulo March 20 |
| Next race | Gran Premio di San Remo April 3 |
| P | N | Driver | Team | Car | Engine | Tyre | Time | Laps | FL | Led | Gr | Pts |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 32 | Luigi Villoresi |
Scuderia Ambrosiana | Maserati 4CLT/48 [1594] |
Maserati 4CL L4C 1.5 | – | 01:57:17.300 | 15 | 6 | 1 | 0 | |
| 2 | 36 | Giuseppe Farina |
Scuderia Ferrari | Ferrari 166C [04C] |
Ferrari 166C V12 2.0 | – | 01:57:59.300 | 15 | 0 | 2 | 0 | |
| 3 | 8 | Francisco Marques |
F. Marques | Maserati 4CL |
Maserati 4CL L4C 1.5 | – | 02:03:18.600 | 15 | 0 | 6 | 0 | |
| 4 | 30 | Aloysio Fontenelle |
A. Fontenelle | Alfa Romeo 8C-2300 Monza [2211135] |
Alfa Romeo L8C 2.3 | – | 02:04:46.700 | 15 | 0 | 7 | 0 | |
| 5 | 40 | Henrique Casini |
H. Casini | Alfa Romeo Tipo 308 [50016] |
Alfa Romeo L8C 3.0 | – | +1 lap | 14 | 0 | 5 | 0 | |
| 6 | 28 | Annuar de Góes |
A. de Góes | Maserati 6CM |
Maserati 6CM L6C 1.5 | – | +2 laps | 13 | 0 | 9 | 0 | |
| 7 | 10 | Carlos Barbosa |
C. Barbosa | Maserati 8CM |
Maserati 8CM L8C 3.0 | – | +3 laps | 12 | 0 | 11 | 0 | |
| DNF | 22 | Alberto Ascari |
Scuderia Ambrosiana | Maserati 4CLT/48 [1593] |
Maserati 4CL L4C 1.5 | – | Accident | 8 | 07:21.700 | 9 | 4 | 0 |
| DNF | 14 | Domingos Lopes |
D. Lopes | Bugatti Type 51 [‘II’] |
Bugatti L8C 2.3 | – | Accident | 8 | 0 | 13 | 0 | |
| DNF | 2 | Chico Landi |
Francisco Landi | Maserati 4CL |
Maserati 4CL L4C 1.5 | – | Carter | 5 | 0 | 3 | 0 | |
| DNF | 38 | Nino Estefanini |
N. Estefanini | Alfa Romeo 8C-2300 Monza [2211138] |
Alfa Romeo L8C 2.3 | – | DNF | 3 | 0 | 12 | 0 | |
| DNF | 26 | Rodrigo Miranda |
R. Valentim Miranda | Maserati A6GCS [2001] |
Maserati A6G L6 2.0 | – | DNF | 2 | 0 | 8 | 0 | |
| DNF | 16 | Antonio Fernandes da Silva |
A. F. da Silva | Maserati 4CL |
Maserati 4CL L4C 1.5 | – | Accident | 0 | 0 | 10 | 0 | |
| DNA | 4 | Moacyr Leite |
M. Leite | Maserati 6CM |
Maserati 6CM L6C 1.5 | – | DNA | 0 | 0 | 0 | ||
| DNA | 6 | Jaime das Neves |
J. das Neves | Alfa Romeo Tipo 308 |
Alfa Romeo L8C 3.0 | – | DNA | 0 | 0 | 0 | ||
| DNA | 12 | Francisco Credentino |
F. Credentino | Maserati 8CM |
Maserati 8CM L8C 3.0 | – | DNA | 0 | 0 | 0 | ||
| DNA | 18 | Gino Bianco |
A. José Pereira | Maserati 8CM [3007] |
Maserati L8C 3.2 | – | DNA | 0 | 0 | 0 | ||
| DNA | 20 | Osmar Lage |
O. Lage | Maserati 4CM |
Maserati 4CM L4C 1.5 | – | DNA | 0 | 0 | 0 | ||
| DNA | 34 | Carlos Soares |
C. Soares | Alfa Romeo 8C-2300 Monza |
Alfa Romeo L8C 2.3 | – | DNA | 0 | 0 | 0 |