McLaren MP4/6

The McLaren MP4/6 is a successful Formula One racing car designed by 's Neil Oatley, Matthew Jeffreys, David North, David Neilson, Bob Bell and Mike Gascoyne; powered by the RA121E V12 engine for use in the 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.
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==Design and pre-season testing ==
The MP4/6 was the first McLaren to be powered by a V12 engine, which Honda quote at 735 PS (725 bhp; 541 kW) at 13,500rpm. The car was tested by Berger in the off-season, but he was unimpressed with the initial version of the new engine, feeling it was underpowered compared to the 690 bhp (515 kW; 700 PS) V10 engine used in the 1990 car, the MP4/5B. When Senna returned for pre-season testing he and Berger, along with Honda, knuckled down to try to solve the engine's problems. McLaren's domination in the early part of the year was mainly due to the lack of reliability of the 700 bhp (522 kW; 710 PS) V10-powered Williams FW14.
By the latter half of the season Honda and Senna had managed to improve the engine to 780 hp (581.6 kW) @ 14,800 rpm.
The MP4/6 raced throughout with a manual "H" pattern gearbox. A semi-automatic transmission was tested during the season (and shown at the ; the car equipped with it ran 4 laps on track in practice before Senna spun off; the car was then converted back to a manualESPN Speedworld: 1991 Hungarian Grand Prix) but was never regarded as good enough to be used in a race; and Williams were the only teams to use semi-automatic gearboxes during 1991. The MP4/6 would go down as the last Formula One car to win a World Championship using a manual transmission and the only F1 car to with the World Championship with a V12 engine.
==Season summary==
Senna won the first four races of the season, in the United States, Brazil, San Marino and Monaco, before and Nigel Mansell found their feet with the FW14, which dominated in mid-season. Consistent podium finishes throughout the year helped McLaren, but Senna insisted that Honda step up their engine development programme and demanded further improvements to the car before it was too late. Honda responded with updated versions of the V12 engine, while Oatley redesigned various features of the car, particularly the sidepods and wings. Senna won in Hungary and Belgium before clinching his third and final Drivers' Championship in Japan with second place behind Berger; he then won the final race in Australia to secure the team's fourth consecutive Constructors' Championship.
McLaren continued with the MP4/6, upgraded to 'B' specification, for the first two races of , Senna finishing third in South Africa. The car was then replaced with the official 1992 car, the MP4/7A, though three MP4/6Bs were brought to the 1992 Brazilian Grand Prix as spares.
The MP4/6 was considered by some to be the most competitive car in the Formula One field until Williams sorted the FW14, which was aerodynamically and technically more advanced. In all, the MP4/6 took eight Grand Prix wins and ten pole positions and scored 148 points. The car brought a close to McLaren's and Honda's domination of the sport, stretching back to the mid-1980s.
File:Ayrton Senna McLaren MP4-6 1991 United States.jpg|Ayrton Senna won the 1991 United States Grand Prix with the MP4/6.
File:Honda RA121E engine Honda Collection Hall.jpg|The RA121E V12 engine.
== Other ==
In July 2017, Codemasters confirmed that the car will be appearing as one of the classic cars in the game F1 2017.
==Race Victories==
Year	Event	Driver 	Notes
 	 	Ayrton Senna 	
 	 	Ayrton Senna 	
 	 	Ayrton Senna 	A Grand Prix One-Two finish of the team
 	 	Ayrton Senna 	
 	 	Ayrton Senna 	
 	 	Ayrton Senna 	A Grand Prix One-Two finish of the team
 	 	Gerhard Berger	First win of Gerhard Berger as a Driver; 
A Grand Prix One-Two finish of the team
 	 	Ayrton Senna 	
==Complete Formula One Results==
Year	Driver	Engine 	Chassis Type	Tyre 	1	2	3	4	5	6	7	8	9 	10	11	12	13	14	15	16
 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
 	Senna 	RA121E V12	MP4/6 	rowspan="2" align=center	 	 	 	 	 	 	 	 	7th 	 	 	 	 	 	 	
 	Berger	RA121E V12	MP4/6 	 	 	 	 	 	 	 	 	 	{4th}}	 	 	 	 	 	 	
 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
 	Senna 	RA122E V12	MP4/6B 	rowspan="2" align=center	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
 	Berger	RA122E V12	MP4/6B 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
==References==
Category:Cars
Category:1991 Cars
Category:1992 Cars
Category:McLaren Racing
Category:McLaren Cars