PSA-Renault X-Type engine

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The PSA X engine is a family of internal combustion engines used in Citroën, Peugeot, Talbot and Renault automobiles. The X family was mainly used in superminis and the entry-level models of mid-size cars. It was designed and manufactured by the company "Française de Mécanique", a joint venture created by Peugeot (as predecessor to Groupe PSA) and Renault in 1969, and built in Douvrin in northern France. It is commonly called the "Suitcase" engine, the "Douvrin" nickname being commonly used for the bigger 2.0–2.2-liter J-Type engine, which was also built in Douvrin. The X design was introduced in 1972 with the Peugeot 104. It was an all-aluminium alloy SOHC inline-four design with two valves per cylinder driven by a chain, using petrol as fuel. It was applied transversely in front wheel drive vehicles only, tilted by an almost horizontal attitude of 72 degrees. The integral transmission is mounted on the rear side of the crankcase (thus appearing to be underneath the power unit when it is mounted in the vehicle), and is driven by transfer gears which give a distinctive "whine" — a trait shared with the BMC A-Series engine, which uses a similar construction. Displacement ranged between 1.0 and 1.4 L (954 and 1,360 cc). The side mounting of the transmission onto the crankcase is what gives rise to the nickname "suitcase engine", as the transmission and engine assemblies resemble two halves of a suitcase when they are split for disassembly. The X was used until 1990 in PSA vehicles — Renault discontinued the unit in 1982 when it reverted to its own Cléon-Fonte engine powerplants when the R14 was replaced by the R9/R11. It was replaced in PSA vehicles by the more modern belt driven camshaft TU which was introduced in 1986 in the Citroën AX. The TU...