The Packard V-1650 is a liquid-cooled V12 aircraft engine developed by Packard Motor Car Company during World War II. It was based on the British Rolls-Royce Merlin engine and produced around 1,200 horsepower. This engine was widely used in various military aircraft, including the P-51 Mustang, contributing significantly to the aircraft's performance and range. The V-1650 was known for its reliability and efficiency, making it a preferred choice for many Allied forces. Its design allowed for high-altitude performance, which was crucial in aerial combat. The engine played a vital role in the success of several key missions during the war.