The Dodge Hemi refers to a series of high-performance engines produced by Dodge, known for their distinctive hemispherical combustion chamber design. This design allows for better airflow and more efficient combustion, resulting in increased power and torque. The Hemi engine has become a symbol of American muscle cars, often associated with performance and speed. Introduced in the 1950s, the Hemi engine has evolved over the decades, with various iterations used in models like the Dodge Charger and Dodge Challenger. Today, the modern Hemi engines are available in different displacements, offering a blend of power and fuel efficiency for a range of vehicles.