The details of the origins of the Turner diesel are unclear, and the adoption of a 68 degree angle between the cylinders in the V-twin and V4 engines is unusual. A range of diesel engines was advertised by their agents from August 1946, and they were advertised in India by September 1946, where they were being assembled by the Malik Diesel Engine (Turner) Mfg Co. They were described as having a "Robson" patent cylinder head. The relevant patent is that by James Malcolm Robson and Turner Manufacturing Co Ltd in 1944.
