 The biggest single step forward for mass-market diesel cars came in 1982 when PSA Peugeot Citroën introduced the XUD engine in the Peugeot 305, Peugeot 205 and Talbot Horizon.This was the class leading automotive diesel engine until the mid-1990s.The first mass market turbo diesel was the XUD powered, 1988 Citroën BX and then the 1989 Peugeot 405, they gave power and refinement approaching petrol engine standards, with the best chassis in their class.