Lorraine-Dietrich was a French automobile and aircraft engine manufacturer from 1896 until 1935, created when railway locomotive manufacturer Société Lorraine des Anciens Etablissements de Dietrich et Cie de Lunéville (known as De Dietrich et Cie, founded in 1884 by Jean de Dietrich) branched into the manufacture of automobiles. The Franco-Prussian War divided the company's manufacturing capacity, one plant in Niederbronn-les-Bains, Alsace, the other in Lunéville, Lorraine.
In 1896, managing director of the Lunéville plant, Adrien, Baron de Turckheim, bought the rights to a design by Amédée Bollée. This used a front-mounted horizontal twin engine with sliding clutches and belt drive. It had a folding top, three acetylene headlights, and, very unusual for the period, plate glass windshield. While the company started out using engines from Bollée, de Dietrich eventually produced the entire vehicle themselves.
In 1898, de Dietrich debuted the Torpilleur (Torpedo) racer, which featured a four-cylinder engine and independent suspension in front, for the Paris-Amsterdam Trial; Gaudry wrecked en route, but still placed third. The response was substantial, exceeding one million gold francs. The 1899 torpilleur was less successful, despite underslung chassis, a rear-mounted monobloc four, and twin carburettors; poor preparation left none of the works teams able to complete the Tour de France.
The Bollée-inspired design was supplanted by a licence-built Belgian Vivinus voiturette at Niederbronn and a Marseilles-designed Turcat-Méry at Lunéville, following a 1901 deal with that cash-strapped company.