Citroën DS

A single, twenty-year model run rather than a line of generations: the DS launched in 1955 and stayed in production, evolving continuously rather than being replaced, until 1975.^[1] It introduced hydropneumatic self-levelling suspension and disc brakes to mass production in the same car, and its shape was aerodynamic enough that Wikipedia’s own drag-coefficient list still places it well ahead of most cars built decades later. This catalogue treats it as one entry spanning the whole run, with its real evolution (the cheaper ID submodel, the DS19 through DS23 engines, electronic fuel injection arriving in 1970) recorded as trims rather than separate generations.