The Swift DB4 is an open-wheel formula racing car chassis, designed, developed and built by American Company Swift Engineering, for the Formula Atlantic spec-series, between 1987 and 1997. It won the championship five times, with four championships won four consecutive years in a row (1988, 1990–1993). It was powered by naturally aspirated 1.6 L (98 cu in) Toyota 4A-GE four-cylinder engine, producing about 240 hp (180 kW), which drove the rear wheels through a standard 5-speed manual transmission.