https://en.wikipedia.org/wiki/Benetton_B186 The B186, along with the Brabham BT55, Arrows A9 and other BMW-engined cars in 1986 are the most powerful Grand Prix cars ever built. The B186 in particular, being the most competitive of the BMW engined cars that season could produce 1,350+ hp in qualifying trim, and about 900 hp in race trim.