The Citroën C4 & C6 was a series of cars introduced in 1928. The C4 and C6 were the successors to the Citroën Type B14, with the C4 being the more entry level variant, while the C6 was placed as the luxury variant. The C4 was powered by a 1.6L inline four engine, while the C6 received a 2.4L inline six engine, the first available on a Citroën. The C4 and C6 were offered in various body styles, but only the C6 was available as a roadster and cabriolet. Production of the Citroën C4 & C6 ended in 1932.