| Date | Sunday 25 April 1948 |
| Event | Rio GP |
| Circuit | Gávea |
| Event Format | Race of 20 laps |
| Championship | Non-championship |
| Race number | #2 of 19 in 1948 #66 (of all time) |
| Laps | 20 |
| Circuit Perimeter | 10650 m |
| Race Distance | 10650 × 20 = 213.000 km |
| Entries | 10 |
| Qualifiers | No qualifying session |
| Finishers | 8 |
| Debutants | Aloísio Fontenelle (Driver),
Benedicto Lopes (Driver),
Carlos Barbosa (Driver),
Chico Landi (Driver),
Francisco Credentino (Driver),
Gino Bianco (Driver),
Osmar Lage (Driver),
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Plínio Seabra (Driver),
Vittorio Rosa (Driver),
Alfa Romeo (Car Model),
Alfa Romeo 8C-308 (Car Model),
Maserati (Car Model),
Maserati 8CM (Car Model),
Simca-Gordini (Car Model)
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| Milestones | Alfa Romeo – 1st Fastest Lap (Engine Manufacturer)
Alfa Romeo – 1st Win (Engine Manufacturer)
Chico Landi – 1st Fastest Lap (Driver)
Chico Landi – 1st Win (Driver)
Alfa Romeo – 1st Fastest Lap (Car Manufacturer)
Alfa Romeo – 1st Win (Car Manufacturer)
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