The XR2's engine was replaced by a lean-burn variant in November 1986 which featured a revised cylinder head and carburettor; this reduced emissions, but resulted in a small drop in power (although Ford still claimed the same maximum power output).
  At this point the manufacturer also took the opportunity to offer the 5-speed manual transmission, already standard on the 1.3 L model, as an option with the upgraded 1.1 L car.

The 1.3–L CVH was replaced by a 1.4–L lean burn version of the same power unit for 1986, whilst the other engines were modified in order to use unleaded petrol.
  In February 1986 all models received the 40 litre fuel tank, previously reserved for the XR2 model, increasing fuel capacity and range by 17%.
The XR2's engine was replaced by a lean-burn variant in November 1986 which featured a revised cylinder head and carburettor; this reduced emissions, but resulted in a small drop in power (although Ford still claimed the same maximum power output).   At this point the manufacturer also took the opportunity to offer the 5-speed manual transmission, already standard on the 1.3 L model, as an option with the upgraded 1.1 L car.
The 1.3–L CVH was replaced by a 1.4–L lean burn version of the same power unit for 1986, whilst the other engines were modified in order to use unleaded petrol.   In February 1986 all models received the 40 litre fuel tank, previously reserved for the XR2 model, increasing fuel capacity and range by 17%.
Ford Fiesta (second generation)