 It was powered by the 3.5-litre Ford HBD7 V8 engine.The car was driven by triple World Champion Ayrton Senna, in his sixth season with McLaren, and by Michael Andretti - son of World Champion Mario Andretti - who joined Formula One from CART.After the Italian Grand Prix, Andretti returned to the US and was replaced by the team's test driver Mika Häkkinen.