The Daihatsu E-series engine is a range of compact three-cylinder, internal combustion piston engines, designed by Daihatsu, which is a subsidiary of Toyota. The petrol-driven series has cast iron engine blocks and aluminum cylinder heads, and are of either SOHC or DOHC design, with belt driven heads.

The Innocenti Mini is an automobile introduced by Innocenti in 1974. The vehicle was a rebodied, three-door hatchback version of the Mini, styled by Bertone. A five-door prototype was developed around 1980, but was never put into production. After having been sold to De Tomaso in 1976, the Innocenti Mini ended up being powered by Daihatsu-sourced three-cylinder engines and continued in production in incrementally updated forms until 1993.