The C15 was based on the Citroën Visa (discontinued 1988), and mainly used a 1769 cc XUD or 1868 cc (DW8 on late models), naturally aspirated (non turbo) diesel engine. Until the early 1990s, it was also available with a petrol PSA TU engine. While the car ahead of the B pillar was mostly the same as a regular Citroën Visa, the cargo area was unique. The rear axle had to carry heavy loads and so a sturdier Citroën BX unit was installed rather than the Visa one.