The Rolls-Royce Crecy was an unusual British experimental two-stroke, 90-degree, V12, liquid-cooled aero-engine of 1,536 cu.in (26 L) capacity, featuring sleeve valves and direct petrol injection. Developed between 1941 and 1945 it was the most advanced two-stroke aero-engine ever to be built.
The engine was named after the Battle of Crécy, battles being the chosen theme for Rolls-Royce two-stroke aero engines. There were however no subsequent Rolls Royce engines of this type, and jet engines were subsequently given the names of rivers.
The Crecy was intended to power the Supermarine Spitfire after flight testing in a converted Hawker Henley, but neither aircraft type flew with this engine fitted. The project was cancelled in December 1945 as the progress of jet engine development overtook that of the Crecy and replaced the need for this engine.
Read more about Rolls-Royce Crecy: Design and Development, Specifications (Crecy)