The Vaillant was a French

automobile A car, or an automobile, is a motor vehicle with wheels. Most definitions of cars state that they run primarily on roads, Car seat, seat one to eight people, have four wheels, and mainly transport private transport#Personal transport, peopl ...

built in

Lyon Lyon (Franco-Provençal: ''Liyon'') is a city in France. It is located at the confluence of the rivers Rhône and Saône, to the northwest of the French Alps, southeast of Paris, north of Marseille, southwest of Geneva, Switzerland, north ...

from 1922 to 1924. It was a

cyclecar A cyclecar was a type of small, lightweight and inexpensive motorized car manufactured in Europe and the United States between 1910 and the early 1920s. The purpose of cyclecars was to fill a gap in the market between the motorcycle and the c ...

which used a

Chapuis-Dornier Chapuis-Dornier was a French manufacturer of proprietary engines for automobiles from 1904 to 1928 in Puteaux near Paris. Between 1919 and 1921 it displayed a prototype automobile, but it was never volume produced.Linz, Schrader: ''Die große Autom ...

engine of either 961 cc or 1350 cc.

References

David Burgess Wise, ''The New Illustrated Encyclopedia of Automobiles''. Cyclecars Defunct motor vehicle manufacturers of France {{vintage-auto-stub