the mk2a zuisei engine was a 14-cylinder, supercharged, air-cooled two-row radial engine with a 140 mm (5.5 in) bore and 130 mm (5.12 in) stroke for a displacement of 28l (1,710ci) and a nominal power rating of 805 kw (1080 hp) for takeoff and 787 kw (1055 hp) at 2800 meters (9185 feet).