After the war Coventry Victor Motor Co produced a range of petrol and diesel engines for marine and industrial use. The diesel engines included air and water cooled vertical single cylinder units (AD1, AD2, AD3 and WD1, WD2, WD3 models respectively), twin cylinder air-cooled HDA model, and water-cooled HDW models (also known as the Vixen). The petrol engines included twin cylinder air-cooled MA2 and AN4 models, and twin cylinder water-cooled MW2 and WN4 models. The AN4 was used in the 1950s by Thomas Green & Son on their 'Griffin' models PRR and PRY motorised rollers. Coventry Victor also produced a flat-four air-cooled petrol engine (the AC4 or 'Neptune'), one use of which was in aircraft pressure test trolleys made by Sir George Godfrey & Partners. Major W.A. Weaver (managing director of the Coventry Victor Motor Co) converted one of these in 1955 for use in a Piper Cub aircraft, naming it the 'Flying Neptune'. Coventry Victor engines were also used in airfield pumping sets and to operate hydraulic ramps such as the Hylo Mk II mobile lifter made by Aviation Traders (Engineering) Ltd in the 1960s.