The 14CV C11 that appeared in 1926 was a long-awaited 'first' for the marque, powered as it was by Voisin's first production 6-cylinder engine (the 1923 Grand Prix de Tours unit never progressing beyond its competition application).

Marius Bernard based the 6-cylinder on the 4 cylinder he designed for the C7, and the C11 chassis began its career with a standard C7 body, together with a lightweight convertible body informally called the Sulky.

The latter was finally chosen for initial series production, evolving the following year with a new hood design allowing larger rear side windows - a style which proved popular with many celebrities of the time, including the Queen of Yugoslavia.

The other coachwork styles remained unchanged, as did the mechanical specification (bar a new finned silencer).

Minor modifications were announced in 1928, the code names of the C11 range bodies consisting of:

- bare chassis : Chasidim
- 2-door 4-light saloon (the so-called 'Lumineuse') : Chasserons
- 2-door 4-light 'Sulky' cabriolet : Chassidear
- 4-door 4-light saloon : Chasseriez
- 7-seater six-light saloon : Chasselas