The short chassis sports version of the C1, the C3C was launched at the 1921 Paris Salon. It was available in chassis form or with a factory torpedo body. It was powered by the C1 4-litre engine, slightly tuned to develop 90 bhp, and the chassis was 17 cms shorter than the model on which it was based.

Front wheel brakes became available as an option for the 1922 model year, and were fitted as standard from 1923 onwards, along with sports coachwork inspired by the victorious Strasbourg GP cars in addition to the chassis only form.
The factory team cars had finished in 1st, 2nd, 3rd and 5th places in the Touring car class at the 1922 Grand Prix, thanks in part to Gabriel Voisin's ingenious interpretation of the regulations regarding body width.