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After the war Delahaye continued to race their prewar cars until the Type 175 S was released in 1948. The new car was styled at the factory by Philippe Charbonneaux and used a seven bearing 4.5 liter six-cylinder with a DeDion-Type rear axle.

175s competed only briefly and was unsuccessful during its initial year.

An example bodied by Motto competed in the 1950 Carrera Panamerica and finished 12th. The same car was raced at the 1951 Monte Carlo rally, finishing first for drivers Jean Trevoux and Roger Crovetto which was also the last appearance of the 175.