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Isuzu has used both its own engines and General Motors-built engines. It has also developed engines for General Motors, Renault, Saab, Honda, Nissan, Opel and Mazda.
Isuzu engines carry a two-character prefix which designate the number of cylinders and engine family. Engines available currently include the following:
Isuzu's first petrol engines were license built Hillman units for the locally assembled Minx, from 1953. Called the GH10 it has a bore of 65 mm and a stroke of 95 mm for a displacement of 1,260 cc. Power is 37. 5 PS. In 1955 this was updated to the GH12, a square design with a 76. 2 mm bore and stroke for a displacement of 1,390 cc. This was upgraded in 1956 for more power, 46 PS rather than the original's 43 PS , and was renamed GH100. In 1958, power increased yet again, to 50 PS....