High Quality Content by WIKIPEDIA articles! List of Volkswagen Group Diesel engines. The compression-ignition diesel engines listed below are currently used by various marques of automobiles and commercial vehicles of the German automotive concern, Volkswagen Group, and also in Volkswagen Marine and Volkswagen Industrial Motor applications. All listed engines operate on the four-stroke cycle, and unless stated otherwise, use a wet sump lubrication system, and are water-cooled.