Originally the car was powered by 1294 cc and 1442  ccc versions of the "Poissy engine" with electronic ignition and a four-speed gearbox. From launch it was available in three trim levels: GL, S and GT. Equipment levels were high, with the later GLS version featuring central door locking and electric windows, accessories that up until then had only generally featured in larger more upmarket cars. Having won the Car of the Year award, it was initially a success both at home and in the export. Production levels shot up from a daily 400 at introduction in September 1975 to 850 in December of that year, to 1100 a day in late 1976. The 1307 (7 CV) had the smaller engine, while the 1308 (8 CV) received the larger version. Unlike the other models, the more sporting 1307 S received twin Weber carburettors in continental European markets to provide a more powerful and revvy engine while remaining in a lower tax category. In the UK, the 1307 S has the same single Solex carburettor as the GL.