 Between 1986 and 1991, Honda won six consecutive Formula One Constructors' Championships as an engine manufacturer, as well as five consecutive Drivers' Championships with Nelson Piquet, Ayrton Senna and Alain Prost.Williams-Honda won the crown in 1986 and 1987.Honda switched allegiance to McLaren in 1988, and then won the title in 1988, 1989, 1990 and 1991.