opel c20xe

The Family II is a straight-4 piston engine that was originally developed by Opel in the 1970s, debuting in 1981. Available in a wide range of cubic capacities ranging from 1598 to 2405 cc, it simultaneously replaced the Opel CIH and Vauxhall Slant-4 engines, and was GM Europe's core mid-sized powerplant design for much of the 1980s, and provided the basis for the later Ecotec series of engines in the 1990s.
The Family II shares its basic design and architecture with the smaller Family I engine – and for this reason the Family I and Family II engines are also known informally as the "small block" and "big block", respectively – although the 1. 6 L capacity was available in either type depending on its fuelling system....