Jet engine
As a response to the new emissions standards taking effect in 1978, the 1.2-litre Saturn engine was replaced by the new 70 PS Orion G11B (1,244 cc) in April 1977. This was the new lean-burning MCA-Jet engine, which was added to the existing Saturn 4G33 and 4G32 engines in June. Power for these (now G33B/G32B) was reduced to and .