The cars were designed by Jean-Albert Grégoire and were initially built in small numbers for competition use though some were used on the road. They used a front-wheel-drive system featuring Grégoire's patented Tracta constant-velocity joint and sliding pillar independent front suspension and a live axle with quarter-elliptic leaf springs at the rear. 1100, 1200, 1500 and 1600 cc engines made by S.C.A.P. were available with optional Cozette supercharger. The 1500 cc car was claimed to reach 80 mph.
The first cars were made in a workshop in Versailles but Grégoire soon moved to a small factory in Asnières. After about 140 cars were made there came a change of engines with larger six-cylinder 2.7-litre units from Continental and 3- and 3.3-litre ones from Hotchkiss fitted in coupé and saloon-bodied road cars.
The company failed to make money from car manufacture and production stopped in 1934. Grégoire kept the factory on for his design and engineering work.
In 1955 Grégoire introduced the prototype of Tracta's Sports Cabriolet, with body by Chapron, front-drive with a 2.2-liter supercharged boxer engine ahead of the front wheels. Only four cars were built.
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1929 Tracta A Le Mans : S.C.A.P. 4-cylinder engine, 995 cc, 45 hp