The McLaren MP4/4, also known as the McLaren-Honda MP4/4, is one of the most successful Formula One car designs of all time. Powered by Honda's RA168E 1.5-litre V6-turbo engine and driven by teammates Alain Prost and Ayrton Senna, the car competed during the 1988 Formula One season. The design of the car was led by American engineer Steve Nichols, the full responsibility for the design of the chassis having been conferred on him by Ron Dennis. Gordon Murray, as Technical Director, had the role of liaising between the drawing office and production.

A Formula One car or F1 car is a single-seat, open-cockpit, open-wheel formula racing car with substantial front and rear wings, and an engine positioned behind the driver, intended to be used in competition at Formula One racing events. The regulations governing the cars are unique to the championship and specify that cars must be constructed by the racing teams themselves, though the design and manufacture can be outsourced. Formula One drivers experience peak cornering forces of up to six lateral g.