The Douvrin family was an all-aluminum inline-four automobile engine designed in the early 1970s and produced from 1977 to 1996 by Compagnie Française de Mécanique, a joint-venture between PSA and Renault located in the town of Douvrin in northern France. This engine is designed by the engineer Jean-Jacques His (father of Formula 1 engines from Renault and Ferrari). It was produced in the same factory as the PRV V6, which also is sometimes known outside France as the "Douvrin" V6. The Douvrin engine is also referred to as the ZDJ/ZEJ engine by Peugeot, and as the J-type engine by Renault. Construction This engine had an aluminium alloy block with cast iron liners, and an aluminium alloy head with one overhead camshaft driven by belt. Its displacement varied from 1995 to 2165 cc. This engine should not be confused with the PSA-Renault X-Type engine whose displacement varied from 954 to 1360 cc and had a gearbox integrated to the block. The Douvrin engine on the contrary, had a conventional (external) gearbox setup, and was longitudinally or transversely mounted depending on car model. 2.0 The was an oversquare design with a single belt driven overhead camshaft, an bore and stroke. Though somewhat dull (with only a 6000 rpm redline) and slow in throttle response, the normally aspirated 8-valve versions proved extremely reliable. Mileages of over without major repairs are not uncommon. The 12-valvers are much livelier and also boast above-average reliability. The turbocharged versions have only average reliability. Applications PSA Renault It was produced in a variety of configurations for Renault: naturally aspirated 8-valve, single-barrel carburetor, , from 1978 to 1993 naturally aspirated 8-valve, double-barrel carburetor, , from 1977 to 1992 naturally aspirated 8-valve, multipoint, Bosch L(U/E) Jetronic fuel injection, ( with catalytic converter), from 1984 to 1989 (Catalytic converters required in North American market only.) naturally aspirated 8-valve, multipoint, BENDIX ECU-driven, fuel injection, ( with catalytic converter), from 1989 to 1996 naturally aspirated 12-valve, multipoint fuel injection, , ( with catalytic converter), from 1989 to 1996 turbocharged 8-valve, multipoint fuel injection, ( with catalytic converter), from 1987 to 1993 (Catalytic converters fitted IAW EC directive in MY '89; now referred to as EURO III). Renault 18[1] Renault 20 Renault 21 Renault 25 Renault Espace Renault Fuego Renault Safrane Renault Trafic Others SIMI Cournil SCE15/25 Auverland SC 11/200/250 2.2 The version was derived from the by a stroke extension from , making