The 1984 Italian Grand Prix was a Formula One motor race held at Monza on 9 September 1984. It was the fourteenth race of the 1984 Formula One World Championship. The 51-lap race was won by Austrian Niki Lauda, driving a McLaren-TAG, with local drivers Michele Alboreto and Riccardo Patrese second and third in a Ferrari and an Alfa Romeo respectively. With teammate Alain Prost retiring, Lauda opened up a 10.5-point lead over the Frenchman in the Drivers' Championship with two races remaining.