Hemi engines aren't perfect. Sorry. Half-grapefruit-shaped combustion chambers sure do let designers increase valve sizes, and in the larger displacement Hemis, these valves could probably pass golf ...

The first hemi engines were invented in the early 1900s to power the nation's first automobiles. In the 1940s, improved versions were developed for use in the airplanes of WWII. However, Chrysler's ...

The HEMI logo plastered on modern Dodge cars and Ram trucks promises an increased level of automotive engine performance. But what's the difference between a hemi and a non-hemi engine? The primary ...

The HEMI engine is named after the engine's hemispherical shaped piston heads. While Chrysler brands popularized and trademarked the name, HEMI-style engines were developed in the early 1900s. The ...