The 4BD1 is a 3.9L direct injection diesel sold in Isuzu ELF trucks as well as marine and industrial applications from 1979. Power output varied. 1979 models had 64 kW (87 PS; 86 hp) at 3200rpm, 1988 models had 83 kW (113 PS; 111 hp) at 3200 rpm 270 N?m (200 lb?ft) at 1900 rpm.