Presented at the 1928 Paris Motor Show, the C4 replaced the B14 in the brand catalogue. It had a lower body struc -ture and a completely new chassis-engine design. The open tourer version, available from launch, shipped with a 1,628 cm3 engine developing 30 bhp for a top speed of 90 kph.
The C6 also made its debut in 1928. The first CITROËN to feature a 6-cylinder engine, it was launched in a conver -tible version at the end of 1929.