The Citroën C4 and C6 were designed to replace the Citroën Type A 10 hp and the Citroën Type B family. Their styling was said to be heavily influenced by contemporary American cars, although in France the models were considered simply new.
Citroën C4 & C6 (1928) at a glance
| Maker | Citroën, France |
|---|---|
| Introduced | 1928 |
| Replaced | Citroën Type A 10 hp and Type B family |
| Models | C4 with a four-cylinder, C6 with a six-cylinder |
| C4 rating | 9 CV |
| C6 rating | 14 CV |
| C6S Sport | 15 CV, only 13 built |
| C6G | 15 CV |
| Late C4 VIII | the Rosalie’s weaker 8 CV engine |
| Commercial versions | sedan delivery and coupé utility under the Type AC4 index |
| Successor for the utilities | Citroën Type 23 trucks |
Based on one source (English Wikipedia); the article is short because the source is.
History of the Citroën C4 & C6 (1928)
A new face for Citroën
The C4 and C6 replaced two families at once: the Type A 10 hp at the bottom and the Type B cars above it. The traditional Citroën grille was abandoned for a sleeker, flatter one, and the styling was said to follow American practice of the period, even if French buyers saw the cars as simply new. There were numerous body styles, including a particularly popular commercial line.

Engines and the French tax classes
The C4’s four-cylinder was rated at 9 CV. Only the last remaining stocks were sold as C4 VIII, and those received the weaker 8 CV engine of the successor Rosalie. The C6’s six-cylinder was rated at 14 CV, while the C6S (“Sport”), of which only 13 were built, and the C6G were rated at 15 CV.
Utilities and the name’s second life
Sedan delivery and coupé utility vehicles were also produced under the Type AC4 index on the basis of these cars, before being replaced by the Citroën Type 23 trucks. The C4 and C6 nameplates were later used again, for completely different cars of the 21st century.
Design and features
- Flatter grille: the traditional Citroën grille was dropped for a sleeker, American-influenced face.
- Four or six cylinders: a 9 CV four in the C4 and a 14 CV six in the C6.
- Many bodies: a wide catalogue including a popular commercial line.
- AC4 utilities: sedan delivery and coupé utility versions, later replaced by Type 23 trucks.
Citroën C4 & C6 (1928) versions
- C4: four-cylinder, 9 CV.
- C4 VIII: late cars with the Rosalie’s 8 CV engine.
- C6: six-cylinder, 14 CV.
- C6S Sport: 15 CV, only 13 built.
- C6G: 15 CV.
- Type AC4 utilities: sedan delivery and coupé utility.
The cars they replaced are described under the Type A and the Type B2, and their successor in the range was the Rosalie. More cars are in the Citroën collection.
Video: Mettre en route de la AC4 Part II: la démarrage!
Video by Géraldine Michiels on YouTube.
Sources
- Citroën C4 & C6, English Wikipedia: models, styling, tax ratings, utilities