The Junkers Jumo 211 is a German V12 aircraft engine that was widely used during World War II. It was designed by Franz Josef Neugebauer as a scaled-up version of the earlier Jumo 210, which was Germany’s first modern aviation engine. The Jumo 211 had an inverted V-12 configuration, with three valves per cylinder, a cast crankcase, and a supercharger as standard. It also featured a piston-driven direct fuel injection system, which improved its performance and efficiency. The Jumo 211 competed with the Daimler-Benz DB 601, which was mostly used in fighters, while the Jumo 211 was mainly installed in bombers such as the Junkers Ju 87D, Ju 88, and Heinkel He 111. The Jumo 211 was the most-produced German aero engine of the war, with almost 70,000 units completed. It was later developed into the more powerful Jumo 213.