[1]: 60 The car was powered by a four-cylinder 1463 cc[a] side-valve engine, for which a maximum of 25 kW (34 hp) at 3,500 rpm was claimed.

[1]: 60  The suspension was based on rigid axles front and back,[1]: 60  which was seen as a rather minimalist at a time when competitor vehicles from volume automakers such as the Peugeot 301 were being delivered with independent front suspension.

[1]: 54 In 1935, adjustments were made to the bonnet, with horizontal chrome-lined openings in place of the earlier three shutters.

In 1937, the Celtaquatre received an American-inspired V-shaped grill which was retained throughout the rest of the model's production.

By 1940, most of the Celtaquatre cars remaining in stock were delivered to the French Army.