When Robert Senechal built his first sports car in Courbevoie he was already a world-famous racing car driver. The first Senechal from 1921, the B4, was a sporty two-seater with a 900 cc, four-cylinder engine. The engines came from the Ruby company, a specialist in the field. Quite soon several larger models followed the small two-seater.
In 1922, a Grand Sport with a 975 cc engine with overhead valves was unveiled and in 1923 a model was launched with a 1100 cc engine. The cars were perfect for racing. A Senechal won the Boulogne Grand Prix in 1923 and 1924 and the famous Bol d'Or in 1923, 1924 and 1925. In 1926, the company was taken over by Chenard & Walcker.
In that same year, there were three basic models in the range: the small Voiturette, the Sport and the Grand Sport. All the cars were powered by a 972 cc engine made by Chenard & Walcker. The Voiturette had a side-valve engine, both the other engines had overhead valves. Senechals were manufactured until 1929. From that moment on the company limited itself to its own products.
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