#hemi $HEMI A Hemi refers to a hemispherical engine design commonly used in powerful cars. The term “Hemi” comes from the word hemisphere, meaning half of a sphere. In a Hemi engine, the combustion chamber is shaped like a dome, allowing for better airflow, improved combustion, and more power. This design helps the engine burn fuel efficiently and produce higher performance compared to flat-head engines. The Hemi engine is famous in vehicles like Dodge and Chrysler for its strength, speed, and unique roaring sound that car lovers admire.