Editing McLaren (section)

===TAG-Porsche and Honda engines (1983–1992)===
In the early 1980s, teams like [[Renault F1|Renault]], Ferrari and [[Brabham]] were using 1.5-litre [[Turbocharger|turbocharged]] engines in favour of the 3.0-litre [[naturally aspirated engine]]s that had been standard since 1966.<ref name="tremaynehughes223-228">{{harvnb|Tremayne|Hughes|1998|pages=223–228}}</ref> Having seen in 1982 the need for a turbo engine of their own, Dennis had convinced [[Williams Grand Prix Engineering|Williams]] backer [[Techniques d'Avant Garde]] (TAG) to fund [[Porsche in motorsport|Porsche]]-built, TAG-branded turbo engines made to Barnard's specifications; TAG's founder [[Mansour Ojjeh]] would later become a McLaren shareholder. In the meantime, they continued with Cosworth engines as old rival Lauda came out of retirement in 1982 to drive alongside Watson in that year's 1B development of the MP4.<ref name="motorsportdennis"/><ref>{{harvnb|Henry|1999|pages=42–44}}</ref><ref>{{cite news| first = John| last = Blundsden| title = Dennis confronts the difficulties of his own success|work=[[The Times]] |location=UK| date=  7 July 1988}}</ref> They each won two races, Watson notably from 17th place on the grid in [[1982 Detroit Grand Prix|Detroit]],<ref name="motorsportdennis"/> and at one stage of the season McLaren were second in the constructors' championship. As part of a dispute with [[Fédération Internationale du Sport Automobile|FISA]], they boycotted the [[1982 San Marino Grand Prix|San Marino Grand Prix]].<ref>{{harvnb|Nye|1988|page=235}}</ref> Although {{F1|1983}} was not so fruitful, Watson did win again in the United States, this time from 22nd on the grid at [[1983 United States Grand Prix West|Long Beach]].<ref>{{harvnb|Henry|1999|page=45}}</ref>

Having been fired by Renault, Prost returned to McLaren once again for {{F1|1984}}.<ref>{{harvnb|Henry|1999|page=46}}</ref> Now using the TAG engines, the team dominated, scoring 12 wins and {{frac|2|1|2}} times as many constructors' points as nearest rival Ferrari. In the Drivers' Championship, Lauda prevailed over Prost by half a point, the narrowest margin ever.<ref>{{harvnb|Henry|1999|page=53}}</ref> The McLaren-TAGs were again strong in {{F1|1985}}; a third Constructors' Championship came their way while this time Prost won the Drivers' Championship. In {{F1|1986}}, the [[Williams Grand Prix Engineering|Williams]] team were resurgent with their [[Honda in Formula One|Honda]] engine and drivers [[Nigel Mansell]] and [[Nelson Piquet]], while at McLaren, Lauda's replacement, 1982 champion [[Keke Rosberg]] could not gel with the car. Williams took the Constructors' Championship, but for Prost, wins in [[1986 San Marino Grand Prix|San Marino]], [[1986 Monaco Grand Prix|Monaco]], and [[1986 Austrian Grand Prix|Austria]] combined with the fact that the Williams drivers were taking points from each other meant that he retained a chance going into the last race, the [[1986 Australian Grand Prix|Australian Grand Prix]]. There, a puncture for Mansell and a precautionary pit stop for Piquet gave Prost the race win and his second title, making him the first driver to win back-to-back championships since [[Jack Brabham]] in {{F1|1959}} and 1960.<ref>{{harvnb|Henry|1999|pages=57–63}}</ref> In {{F1|1987}} Barnard departed for Ferrari to be replaced by [[Steve Nichols]] (who himself joined Ferrari in 1989).<ref>{{harvnb|Henry|1999|page=63}}</ref><ref>{{harvnb|Henry|1999|page=78}}</ref><ref>{{harvnb|Tremayne|Hughes|1998|pages=198–199}}</ref> In the hands of Prost and [[Stefan Johansson]], though, Nichols's [[McLaren MP4/3|MP4/3]] and the TAG engine could not match the Williams-Honda.

For {{F1|1988}}, Honda switched their supply to McLaren and, encouraged by Prost, Dennis signed [[Ayrton Senna]] to drive.<ref>{{cite journal |journal=[[Motor Sport (magazine)|Motor Sport]]|first=Nigel|last=Roebuck|author-link=Nigel Roebuck|title=The best of enemies|date=October 2008|volume=84|issue=10|publisher=Stratfield}}</ref> Despite regulations reducing the boost pressure and fuel capacity (and therefore, power) of the turbo cars, Honda persisted with a turbocharged engine.<ref>{{harvnb|Henry|1999|page=65}}</ref> In the [[McLaren MP4/4|MP4/4]], Senna and Prost engaged in a season-long battle, winning 15 of the 16 races (at the other race at [[1988 Italian Grand Prix|Monza]], Senna had been leading comfortably, but collided with back-marker [[Jean-Louis Schlesser]]<ref>{{harvnb|Rubython|2006|page=170}}</ref>). At the [[1988 Portuguese Grand Prix|Portuguese Grand Prix]], their relationship soured when Senna squeezed Prost against the pit wall; Prost won, but afterwards said, "It was dangerous. If he wants the world championship that badly he can have it."<ref>{{harvnb|Rubython|2006|page=171}}</ref> Prost scored more points that year, but because only the best 11 results counted, Senna took the title at the penultimate race in [[1988 Japanese Grand Prix|Japan]].<ref>{{cite web|url=http://www.formula1.com/results/season/1988/|archive-url=https://web.archive.org/web/20141007215552/http://www.formula1.com/results/season/1988/|archive-date=7 October 2014|title=1988 FIA Formula One World Championship |work=Formula1.com |publisher=[[Formula One]]|access-date=2 April 2010}}</ref><ref>{{harvnb|Henry|1999|pages=70–71}}</ref>

The next year, with turbos banned, Honda supplied a new 3.5-L naturally aspirated [[V10 engine]]<ref>{{harvnb|Henry|1999|page=71}}</ref> and McLaren again won both titles with the [[McLaren MP4/5|MP4/5]]. Their drivers' relationship continued to deteriorate, though, especially when, at the [[1989 San Marino Grand Prix|San Marino Grand Prix]], Prost felt that Senna had reneged on an agreement not to pass each other at the first corner.<ref>{{harvnb|Henry|1999|page=73}}</ref> Believing that Honda and Dennis were favouring Senna, Prost announced mid-season that he would leave to drive at Ferrari the following year.<ref>{{cite web |url=http://www.prostfan.com/senna2.htm|title=Ayrton Senna by Alain Prost |publisher=prostfan.com |access-date=4 April 2010}}</ref> For the second year in succession, the Drivers' Championship was decided at the [[1989 Japanese Grand Prix|Japanese Grand Prix]], this time in Prost's favour after Senna and he collided (Senna initially recovered and won the race, but was later disqualified).<ref>{{harvnb|Henry|1999|pages=76–77}}</ref>

[[File:AyrtonSennaAtHockheimGP1993.jpg|thumb|By {{F1|1993}}, Honda had withdrawn from F1 and the team used underpowered [[Ford Motor Company|Ford]] [[V8 engine]]s to power the [[McLaren MP4/8|MP4/8]]. Although Ayrton Senna (pictured at the [[1993 German Grand Prix|German GP]]) won five races, McLaren was not a match for the dominant [[Williams Grand Prix Engineering|Williams]] team. After the [[1993 Australian Grand Prix]], the team failed to win a race until {{F1|1997}}.|left]]
[[File:Mika Hakkinen 1999 Canada.jpg|thumb|right|[[Mika Häkkinen]] won the {{F1|1998}} and {{F1|1999}} Drivers' Championships with McLaren. He is shown here at the [[1999 Canadian Grand Prix]], an event which he won.]]

With former McLaren men Nichols and Prost (Barnard had moved to the [[Benetton Formula|Benetton]] team), Ferrari pushed the British team more closely in {{F1|1990}}. McLaren, in turn, brought in Ferrari's [[Gerhard Berger]], but like the two seasons before, the Drivers' Championship was led by Prost and Senna and settled at [[1990 Japanese Grand Prix|the penultimate race in Japan]]. Here, Senna collided with Prost at the first corner, forcing both to retire, but this time Senna escaped punishment and took the title;<ref>{{harvnb|Henry|1999|page=80}}</ref> McLaren also won the Constructors' Championship. The {{F1|1991}} year was another for McLaren and Senna, with the ascendant Renault-powered Williams team their closest challengers. By {{F1|1992}}, Williams, with their advanced [[Williams FW14B|FW14B]] car,<ref>{{cite news|url=http://news.bbc.co.uk/sport1/hi/motorsport/formula_one/cars_guide/4272031.stm|title=The changing face of F1|work=BBC Sport|date=28 February 2005|access-date=4 April 2010}}</ref> had overtaken McLaren, breaking their four-year run as champions, despite the latter winning five races that year.