List of discontinued Volkswagen Group petrol engines. The spark-ignition petrol engines listed below were formerly used by various marques of automobiles and commercial vehicles of the German automotive concern, Volkswagen Group, and also in Volkswagen Industrial Motor applications, but are now discontinued. All listed engines operate on the four-stroke cycle, and unless stated otherwise, use a wet sump lubrication system, and are water-cooled. This transport-related list is incomplete; you can help by expanding it.