Alan R. Welch and his brothers, owners of the Welch Motor Car Company, are credited for pioneering the first hemispherical engine. The power plant was a simple 20-horsepower, 2-cylinder engine with a single overhead camshaft. Although the General Motors discontinued the HEMI in 1910 when it bought Welch, Peugeot developed its own hemispherical engine. BMW mass-produced a HEMI version before Chrysler engineered it for modern use. Three generations of Hemi engines have been built by Chrysler...
General Challenger
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