The Eclat Series 1 (1974-1980) used a 1973 cc Lotus 907 Slant Four engine. Later cars (1980-1982) used a larger 2174 cc Lotus 912 engine, however, because of emission regulations modifications it still only produced . Both were versions of the Lotus 907 engine series, which was also used in naturally aspirated and turbo charged versions in the Lotus Esprit.