Ailloud, and later Ailloud et Dumond, was a French vehicle manufacturer based in Lyons, active between 1897 and 1904. The firm originated with Claude Ailloud, a bicycle maker who turned to automobile construction in 1897.
Ailloud's first car featured a 618cc vertical-twin engine, initially placed at the rear before being relocated to the front for improved cooling. The vehicle was built on a tubular frame and used a three-speed gearbox with single-chain drive. It received a diploma and a silver medal at the Lyons Cycle and Automobile Show in December 1899, though it appears that only this single example was ever completed.
In 1900, Ailloud partnered with Francisque Dumond, and the newly formed company, Automobiles Ailloud et Dumond, produced five cars fitted with two-cylinder engines. Four of these used 1004cc engines with hot-tube ignition, while the fifth was equipped with a larger 1105cc engine using low-tension magneto ignition. The company subsequently turned to building tricycles powered by single-cylinder De Dion-Bouton engines.
In 1904, Ailloud et Dumond produced its final car, a more ambitious model powered by a 2798cc four-cylinder engine paired with a four-speed gearbox and double-chain drive. This vehicle was sold to a customer in Paris, where it reportedly remained in use until at least 1914.
Following this final production effort, the partners shifted their business toward selling automobiles built by other manufacturers, including De Dietrich, Gregoire, Mors, and Turcat-Méry, marking the end of their own vehicle production activities.
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