The 1984 Brazilian Grand Prix was the first round of the 1984 Formula One Season. It was held at the Jacarepaguá circuit in Rio de Janeiro, Brazil on March 25th 1984. The race was won by McLaren-TAG driver, Alain Prost who also set the fastest lap. Second was Keke Rosberg in a Williams-Honda with polesitter Elio de Angelis third for Lotus-Renault.