PSA XUD engine


The PSA XUD is a diesel engine designed and built by PSA — Peugeot and Citroën. It is an Indirect injection engine, that uses a version of the Ricardo Consulting Engineers Ricardo Comet V prechamber cylinder head design. The engine comes in,, and 2.1-liter displacements. The 2.1 has 12 valves, all displacements were built either naturally aspirated or turbocharged. The XUD was the predecessor to the HDI range of engines. Early HDi Engines were a PSA design, later 16-valve engines were jointly developed with Ford.

Design

The XUD was available with either SOHC 8-valve or 12-valve heads. It was mainly applied transversally in front wheel drive vehicles, tilted by 30°. However, some applications in non-PSA vehicles had the engine installed longitudinally, with rear-wheel drive. The XUD is built in Citroën's plant in Trémery, near Metz.
Displacement ranges between, and all XU diesel engines have a stroke of either. The former was shared with the XU9. Bore sizes range from, some of which are also shared with other XU engines.
Upon its release the engine was noted as one of the best diesel engines in the world with its high power output and refinement it made all other diesel engines seem agricultural. It was also particularly light, with a ready-to-run XUD9 weighing, 15% less than a comparable diesel of the previous generation.

Vegetable oil fuel

The engine, because it is indirect injection, with a slower combustion burn time than direct injection, is suitable to run on SVO. A feature of the Ricardo Comet pre-chamber design is that it makes the engine tolerant of low Cetane value fuels such as SVO. The viscosity of vegetable oil when cold is too great for rotary injection pumps,, preventing it from acting as a lubricant and increasing the workload on the distributor/rotary injection pump and damaging it. The Lucas EPIC pump fitted to the 2.1 L 12 valve turbo-diesel engine after 1995 is the weakest pump of all.

XUD7

The XUD7 has a displacement of, with a bore and a stroke of. Output is for the naturally aspirated version or for the turbocharged model. An intercooled turbocharged version was introduced later, with on tap. All are Diesel engines.
ModelOutputNotesModel of car
XUD7 T/KTurboPeugeot 205 Dturbo, Peugeot 309 XRDT/GRDT/SRDTurbo/GRX DT
XUD7 TETurbo with intercoolerCitroën BX TRD/TZD Turbo, Peugeot 405 Turbo, Honda Concerto TD, Rover 200 MK2 TD
XUD7/KCitroën C15D, Citroën BX RD, Peugeot 205, Citroën Xsara, Citroën Visa
XUD7/Zcatalyst

XUD9

The XUD9 has a displacement of, with a bore and a stroke of. Both turbocharged and naturally aspirated versions were produced. Most turbocharged versions feature an intercooler, although a limited number of installations in the Citroën Xantia featured a Turbocharger without intercooler. Both engines also featured either a Bosch or a Lucas mechanical fuel pump and injectors. The engine version with the Bosch pump is known to have been run with vegetable oil. The original XUD9 engine is known as the "square port" engine, as its cylinder head has square exhaust ports. Later XUD9A engines have oval ports.
PSA Group licensed a modified version of the naturally aspirated version of the engine with a catalytic converter designated the XUD9/Z to Hyundai which was rated at 50kw. It was used in the European specification of the Lantra.
ModelOutputNotesModel of car
XUD9DieselCitroën BX, Peugeot 205, Peugeot 305, Peugeot 309, Talbot Horizon, Talbot 1510
XUD9 ADieselRover 200
Citroën Berlingo
FSO Polonez
Citroën BX
Lada Niva
LDV Pilot
XUD9 TE/LDiesel turbo with intercoolerCitroën ZX
Citroën Xsara
Citroën Jumpy
Peugeot 306
Peugeot 405
Peugeot Expert
XUD9 SDDiesel turbo catalystSuzuki Samurai
XUD9 SDDiesel turbo catalystCitroën Xantia
Suzuki Baleno
Lada Niva
XUD9 TE/YDiesel turbo with intercooler catalystPeugeot 406
Citroën Xantia
Citroën ZX
XUD9/ZDiesel catalystHyundai Lantra

XUD11

The XUD11 was available in two displacements:
  • — XUD11 A naturally aspirated
  • — XUD11 ATE/BTE turbocharged
Both were 12-valve SOHC engines with a stroke. The naturally aspirated XUD11 A was bored to for a total displacement of, while the turbocharged ATE/BTE versions were reduced in bore to for a total of. The BTE engines used a Lucas EPIC fuel pump, whereas the ATE engines used a Bosch injection pump with a throttle cable.
ModelOutputNotesModel of car
XUD11 ADiesel 12-valve SOHCCitroën XM, Peugeot 605
XUD11 ATEDiesel 12-valve SOHC turboCitroën XM
XUD11 BTEDiesel 12-valve SOHC turbo catalystPeugeot 406, Peugeot 605, Citroën Xantia

Vehicles

The engine has been installed into the following vehicles:
  • Auverland A3
  • Citroën BX
  • Citroën Visa
  • Citroën C15
  • Citroën ZX
  • Citroën Xsara
  • Citroën Berlingo
  • Citroën Xantia
  • Citroën XM
  • Eurovan Sevel Nord
  • *Citroën Evasion/Synergie/C8
  • *Citroën Jumpy
  • *Fiat Ulysse
  • *Fiat Scudo
  • *Peugeot 806/807
  • *Peugeot Expert
  • *Lancia Zeta/Phedra
  • Sevel Sud — Larger Panel Van PSA/Fiat Ducato joint venture
  • *Citroën C25
  • *Citroën Jumper
  • *Peugeot J5
  • *Peugeot Boxer
  • FSO Polonez/Caro
  • Honda Concerto
  • Hyundai Lantra
  • Lada Niva
  • LDV 200/Pilot
  • Peugeot 205
  • Peugeot 305
  • Peugeot 306
  • Peugeot 309
  • Peugeot 405
  • Peugeot 406
  • Peugeot 605
  • Peugeot Partner
  • Suzuki Baleno
  • Suzuki Samurai
  • Suzuki Vitara
  • Talbot Horizon
  • Tata Telcoline / Tata Telcosport
  • Rover 200
  • Rover 400
  • Toyota Corolla
  • UMM Alter 2000