The Celtaquatre production line came into full swing in spring 1934. This was the first Renault to succumb to the demands of modern streamlined styling. The curvy coachwork marked such a radical departure from the angular lines of previous models that it was nicknamed the "Celtaball".
Presented in April 1934, the new Celtaquatre was designed to carry four people while meeting high standards in economy and safety. Contemporary advertising presented the Celtaquatre as “the Vivasport of small cars”. This small 9 hp car was Renault’s new entry-level model. It took up its place alongside the Monaquatre, whose engine it borrowed.
In March 1935, the ZR2 type replaced the ZR1 type. The range was expanded to include two saloon versions (luxury and advanced luxury) and a spider coupé. The bonnet gained three horizontal louvers instead of three flaps and the range of body colours was increased.
As well as enjoying a fine reputation for motoring comfort and user satisfaction, the Celtaquatre earned considerable sporting honours, averaging 111 Kph over six hours at the Montlhéry track, and bringing home competition trophies from as far afield as Germany and Egypt.
Following the success of the Novaquatre and the launch of the Juvaquatre, the Celtaquatre disappeared from the catalogue in April 1938.