The Siddeley Tiger is a British aircraft engine developed in the 1920s by the Siddeley Deasy company. It is a water-cooled, V-12 engine known for its reliability and performance. The Tiger was primarily used in military aircraft, contributing to the advancement of aviation technology during its time. This engine powered several notable aircraft, including the Avro 504 and the Bristol Fighter. Its design allowed for improved speed and maneuverability, making it a valuable asset in early 20th-century aviation. The Siddeley Tiger played a significant role in the evolution of aircraft engines in the interwar period.