A. Darracq and Company Limited was a French manufacturer of motor vehicles and aero engines in Suresnes, near Paris. The French enterprise, known at first as A. Darracq et Cie, was founded in 1896 by Alexandre Darracq after he sold his Gladiator Bicycle business. In 1902, it took effect in 1903, he sold his new business to a privately held English company named A Darracq and Company Limited, taking a substantial shareholding and a directorship himself.

The rotary engine is an early type of internal combustion engine, usually designed with an odd number of cylinders per row in a radial configuration. The engine's crankshaft remained stationary in operation, while the entire crankcase and its attached cylinders rotated around it as a unit. Its main application was in aviation, although it also saw use in a few early motorcycles and automobiles.