The Merlin is also an aircraft engine made by Rolls Royce. The Merlin was manufactured (in a few varieties) starting in 1934. The Merlin gained a reputation for being an exceptionally reliable and powerful engine. It powered several very successful aircraft in WWII.
Aircraft powered by the Merlin
Specifications common to all Merlins
Most Merlins were made in the middle to later part of WWII. These Merlins (the 60 series) generated between 1390 and 2000 horsepower, depending on fuel and gearing.