The Arrows A8 was a Formula One car which the Arrows team used to compete in the 1985 and 1986 Formula One seasons. It was powered by the BMW M12 turbocharged engine looked after by Swiss engine guru Heini Mader. The A8 placed 8th in the 1985 Constructors' Championship on 14 points which included a third place podium finish for Thierry Boutsen at Imola but was later moved to 2nd when winner Alain Prost's McLaren was disqualified for being underweight. With the development of the A9 well behind schedule the A8 returned again for the 86' season. In total there were just 5 Chassis's produced for the 85/ 86 seasons and were entered in every race.

As BMW announced to pull out officially at the end of 1986, the Arrows team brokered a deal with support from its primary sponsor, USF&G, to continue the use of the upright BMW engines under the name of its subsidiary Megatron, Inc., founded by long-time F1 aficionado John J. Schmidt, who coined the phrase “Horse racing may have been