Renault engines for airplanes, airships and trucks, some already with all-wheel drive were important in the war period 1914-1918. The achievements of the French industry were much more important for the war than in the Second World War, where France was largely occupied. Renault produced all kinds of military equipment, inter alia one also developed tanks. From 1919 Citroen arose as a second fierce competitor.

It was a grimly duel than the with Peugeot, because Citroen succeeded to come to considerable production figures faster than expected. It was a more grimly duel than the with Peugeot, because Citroen succeeded to come to considerable production figures faster than expected. The company had no old factories with appropriate facilities, but was able to introduce flow production in Europe. The company had no old factories with appropriate facilities, thus was able to introduce flow production in Europe. Renault must keep pace because the market shares itself rapidly adjust.

A typical example was the factory on the Île Seguin, whose formation said to have originated with the intent, to trump by Citroen announced factory start-ups. The project on the island in the Seine was still started before 1929. Supposedly 600,000 cubic meters of earth were needed to win six meters more distance to regular flood. The result was a factory with the longest assembly line (1500 m) on an area of more than 55,000 m² outside the United States.

This factory, whose construction is said to have lasted in total until 1934, by the way, played an important role after the Second World War. In it ended the production of the Renault 5 in 1992. But in the end it was similarly as with the Citroen factories near Paris, it was torn down in 2005. It is now a cultural center.

Back to the year 1922 in which Renault became a joint stock company. This year, the first flow production began.The post-war situation was difficult in France too. There was evidence for the durability of the cars but no real involvement in racing. After all, France as one of the winners could engage directly further in the aircraft industry. As vehicle, however, the result was a Renault, with 6 CV as very economical acclaimed.

Otherwise, military products, such as smaller tanks, were changed over to the needs of agriculture. A new factory was built in Le Mans, with exemplary social services. Thus was also established a kind of vocational school. One even built small locomotives and appeared as a competitor at Citroen's famous rides through rough terrain, first through the Sahara in 1923.

There were again race win in 1925, e.g. at the Rallye Monte Carlo. Records tumbled now more in the aircraft industry. 01/18