The McLaren MP4/6 is a Formula One racing car designed by McLaren's Neil Oatley, Matthew Jeffreys, David North, David Neilson, Bob Bell and Mike Gascoyne; powered by the Honda RA121E V12 engine for use in the 1991 Formula One season, with the engine's design and development led by Osamu Goto. It was driven by reigning World Champion, Brazilian Ayrton Senna, and Austria's Gerhard Berger. Ayrton Senna would win his third World Championship in the MP4/6. The MP4/6 was notable for being the last F1 car to win the championship with a manual gearbox and the only F1 car powered by a V12 engine to do so.
The MP4/6 of Gerhard Berger
Ayrton Senna won the 1991 United States Grand Prix with the MP4/6.
The Honda RA121E V12 engine.
1991 Formula One World Championship
The 1991 FIA Formula One World Championship was the 45th season of FIA Formula One motor racing and the 42nd season of the Formula One World Championship. It featured the 1991 Formula One World Championship for Drivers and the 1991 Formula One World Championship for Constructors, which were contested concurrently over a sixteen-race series that commenced on 10 March and ended on 3 November.
Defending champion Ayrton Senna won his third and final title with McLaren.
Nigel Mansell finished as runner-up with Williams.
Mansell's teammate Riccardo Patrese ended the season ranked third.
Bertrand Gachot in the Jordan during the US GP