The PSA XU is a family of internal combustion engines used in Citroën and Peugeot automobiles. It became the dominant mid-size engine in Peugeot and Citroën products through the 1980s and 1990s.

The XU design was introduced in 1981 with the Peugeot 305. It was a SOHC or DOHC straight-4 design with two or four valves per cylinder, using petrol as fuel. It was applied transversely in front wheel drive vehicles only, tilted by 30°. Displacement ranged between , and all production XU gasoline engines had a bore of . The engine uses an aluminium cylinder head in all models. All models' blocks are made, except XU10, in cast aluminium alloy with removable cast iron wet cylinder liners. XU10 blocks are made in cast iron, with bores machined directly in the block, without removable cylinder liners. Its first Citroën application was on the Citroën BX in 1982, where it appeared in format.

The XU was replaced by the more modern EW/DW family.

XU5

The XU5 had a displacement of , with a bore and a stroke of . All XU5 engines were SOHC 2-valve per cylinder designs. They used either a single or double-barrel carburetor, or fuel injection, depending on model. Output ranges from .

ModelOutputNotesModel of carXU5 JFuel injectionPeugeot 205 GTi 1.6, CTi 1.6Citroën BX16 TRiCitroën Visa GTIXU5 1C1-bbl carburettorPeugeot 205Peugeot 309 GR, XR, SR and SX (-->88)Citroën BX 15 RE/TGE XU5 2C2-bbl carburettorPeugeot 309 GR, XR, SR SX and XS 1.6 (89-->)Citroën BX 16 TRSPeugeot 405 SR, GR, GRX and GL XU5 M3/ZFuel injection catalystPeugeot 309 GR, XRPeugeot 405 GRiPeugeot 205 XS, GT, Roland Garros (1993)Citroën ZXXU5 S2-bbl carburettorPeugeot 305 GT (-->85)XU5 JAFuel injectionPeugeot 205 GTi 1.6 (86-->), CTi 1.6 (-->92)Peugeot 309 1.6 SRiCitroën Visa GTI 115ch (86-->) Citroën BX16 GTi

XU7 The XU7 had a displacement of , with a bore and a stroke of . All XU7 engines used fuel injection, with a 16-valve DOHC version, the XU7 JP4, also produced. Output ranged from .

+ModelCodeOutputNotesModel of CarXU7 JB LFXFuel injection catalystCitroën Berlingo, Citroën Xsara, Citroën Xantia from 1998Peugeot 406 SR, Peugeot PartnerXU7 JPLFWEurovansLFZCitroën Xantia up to 1998, Citroën Xsara, Citroën ZXPeugeot 306, Peugeot 405, Peugeot Pars, IKCO SamandXU7 JP4 LFY16-valve DOHC catalystCitroën Xantia, Citroën Xsara, Citroën ZX 1,8 16VPeugeot 306, Peugeot 406, Peugeot Pars ELX, IKCO Samand SarirXU7PXUPFuel injection catalystPeugeot Pars, IKCO Arisun 2, IKCO Soren Plus

XU8

The XU8 had a displacement of , with a bore and a stroke of . The only engine in this family is the 16-valve DOHC turbocharged XU8 T which was fitted to the Peugeot 205 Turbo 16.

ModelOutputNotesModel of CarXU8 T16-valve DOHC turboPeugeot 205 Turbo 16

XU9 The XU9 was the predecessor to the XU10 and had an aluminum block with wet iron liners. It had a displacement of , with a bore and a stroke of . Many versions were produced, from a double-barrel carburetted 8-valve to a 16-valve DOHC fuel injected model. Output ranged from .

ModelCodeOutputNotesModel of CarXU9 S 159B / 159Z 2-bbl carburettor Peugeot 305 GT and GTXPeugeot 309 1.9 GTCitroën BX 19 GTCitroën BX 19 TRSXU9 2C Peugeot 405 GR, SR and GLXXU9 4 159B Twin 2-bbl carburettor Citroën BX SportXU9 J1 DFZ Fuel injection catalystPeugeot 305 GTXXU9 J1/Z Peugeot 205 CTI, Automatic, GentryPeugeot 309 AutomaticXU9 M DDZ Peugeot 309 XSGamme Peugeot 1990, p. 14.Peugeot 405 GRi, GRiX4Gamme Peugeot 1990, pp. 22–23.XU9 J2 Fuel injectionPeugeot 405 SRiCitroën BX 19 GTi 8VXU9 JA/K D6E Citroën ZX VolcanePeugeot 205 1.9 GTiPeugeot 309 1.9 GTi XU9 JA/Z DKZ Fuel injection catalystPeugeot 205 1.9 GTi CatPeugeot 309 1.9 GTi CatXU9 J4 D6C/L Fuel injection 16-valve DOHCCitroën BX 19 GTi 16VPeugeot 405 Mi16Peugeot 309 GTI-16 XU9 J4/Z DFW Fuel injection 16-valve DOHC catalystCitroën BX 16V CatPeugeot 405 Mi16 CatPeugeot 309 GTI-16 Cat

XU10 The XU10 has a cast iron block with a displacement of , with a bore and stroke of , making it a square engine. Many versions were produced, from a double-barrel carburetted 8-valve to a 16-valve DOHC, fuel injected, turbocharged model. Output ranged from .

ModelCodeOutput (DIN)/rpmNotesModel of CarXU10 2C R2A at 5800 8v — 2-bbl carburettorCitroën XM 2.0 Peugeot 605 2.0XU10 J2C/L RFX8v — Fuel injection catalystCitroën Xantia I 2.0iCitroën ZX Volcane 2.0 Peugeot 306 XSi (-->97)Peugeot 405 SRi 2.0Peugeot 605 (93-->)XU10 J2R6A 8v — Fuel injectionCitroën Xantia I 2.0iPeugeot 605 SRi (select markets)XU10 J2URFW8v — Fuel injection catalystCitroën Jumper 2.0i (-->2002)Peugeot Boxer 2.0i (-->2002)Fiat Ducato 2.0 i.e. (-->2002)RFLCitroën Jumper 2.0i (2002-->)Peugeot Boxer 2.0i (2002-->)Fiat Ducato 2.0 i.e. (2002-->)XU10 J2TE RGYAutomobil Revue 1994, p. 4568v — turbo catalystCitroën XM 2.0 Turbo CTPeugeot 605 2.0 Turbo RGXCitroën XM 2.0 Turbo CTCitroën Xantia 2.0 Turbo CTPeugeot 406 SRi TurboPeugeot 605 2.0 TurboEurovansXU10 J4D/Z RFT16-valve DOHC catalystCitroën ZX Coupé Citroën Xantia I Peugeot 306 S16Peugeot 405 Mi16 mkII (94-->)XU10 J4R/L3 RFVCitroën EvasionCitroën XM (98-->)Citroën XantiaCitroën Xsara Exclusive Fiat UlysseLancia Zeta<br/ >Peugeot 306Peugeot 406 (-->99)Peugeot 806Peugeot 605XU10 J4RS/L3 RFSCitroën ZX Dakar Citroën Xsara VTS<br/ >Peugeot 306 RallyePeugeot 306 GTI6XU10 J4TE RGZ16-valve DOHC turbo catalystPeugeot 405 T16 Turbo 4x4XU10 J4/L/Z RFYAutomobil Revue 1994, p. 45416-valve DOHC catalystPeugeot 405 Mi16Citroën ZX 16v Peugeot 306 S16

Motorsport The XU engine was used in motorsport for over three decades. ModelBore x StrokeDisplacementOutputtorqueNotesModel of Car*NO INFO* 16-valve DOHC turboCitroën AX Superproduction/ Supertourisme prototype (1988)XU8 TPeugeot 205 T16 KitéeXU8 T Evo 1Peugeot 205 T16 Evolution 1XU8 T Evo 2Peugeot 205 T16 Evolution 2XU9J4x16-valve DOHCPeugeot 905 spiderXU10J4x at 8700 rpm at 5900 rpmPeugeot 306 MaxiXU9J4 at 5250 rpm at 3500–4000 rpm16-valve DOHC TR30R turboPeugeot 206 WRCXU7JP4 at 5500 rpm at 2750 rpmPeugeot 307 WRC, Citroën Xsara WRC, Citroën C4 WRC

See also PSA XUD (Diesel variant) List of PSA engines

Sources

Guide des moteurs Peugeot Citroën (in French)