1978-79: Dodge D and W100, D and W200 Pickups
Dodge also jumped on the full-size diesel truck bandwagon in 1978. Their D and W150 (half-ton) and D and W200 (three-quarter ton) models of that year featured a sixcylinder diesel option, namely a superb 3.98L Mitsubishi inline six (6DR5). Available only in ’78 and ’79, it shared general design architecture with the 2.6L diesel four that would come later to the Ram 50 imports. This was an extremely good engine, but being naturally aspirated with only 100 hp on tap it was outclassed in light trucks with up to an 8,400-pound GVW. With the optional automatic performance was even less inspirational. Yeah, it was another diesel victim of bean counting that failed to inspire the truck-buying public to go diesel. Had Dodge opted for the turbocharged 6DS5 variant, at about 130 hp and over 200 lb-ft, the diesel engine could have at least matched six-gasser performance.
DISPLACEMENT: 3.98L (243 ci) POWER: 103 hp @ 3,700 rpm TORQUE: 168 lb-ft @ 2,200 rpm COMPRESSION RATIO: 20:1 ASPIRATION: Natural
1978 Mitsubishi 6DR5 six-cylinder diesel
1978 Dodge W150 diesel