The car also featured a new 2180 cc horizontal boxer water-cooled four-cylinder engine capable of delivering a claimed 70 or, from 1952, 75 HP.

[1] The flat-four engine permitted a low bonnet/hood line but was fitted well forward which enforced an extensive front overhang.

[1] An additional challenge came from government taxation policies during the early 1950s in the French market, which heavily penalised larger cars.

It was noted that for the Grégoire, despite its upmarket aspirations, the company was only able to distribute a very skimpy brochure, provided without any colour pictures.

[1] By 1953 output had slowed and only about 40 were produced,[1] and by the time production ceased towards the end of that year, only 247 Hotchkiss Grégoires had been built; of these 235 had been four-door saloons.