The PSA XUD is a

diesel engine The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-call ...

designed and built by

PSA PSA, PsA, Psa, or psa may refer to: Biology and medicine * Posterior spinal artery * Primary systemic amyloidosis, a disease caused by the accumulation of abnormal proteins * Prostate-specific antigen, an enzyme used as a blood tracer for pros ...

Peugeot Peugeot (, , ) is a French brand of automobiles owned by Stellantis. The family business that preceded the current Peugeot companies was founded in 1810, with a steel foundry that soon started making hand tools and kitchen equipment, and the ...

and

Citroën Citroën () is a French automobile brand. The "Automobiles Citroën" manufacturing company was founded in March 1919 by André Citroën. Citroën is owned by Stellantis since 2021 and previously was part of the PSA Group after Peugeot acquired ...

. It is an

Indirect injection Indirect injection in an internal combustion engine is fuel injection where fuel is not directly injected into the combustion chamber. Gasoline engines equipped with indirect injection systems, wherein a fuel injector delivers the fuel at some po ...

(IDI) 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 In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pro ...

. 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 An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion cha ...

8-valve or 12-valve heads. It was mainly applied transversally in

front wheel drive Front-wheel drive (FWD) is a form of engine and transmission layout used in motor vehicles, where the engine drives the front wheels only. Most modern front-wheel drive vehicles feature a transverse engine, rather than the conventional lon ...

vehicles, tilted by 30°. However, some applications in non-PSA vehicles had the engine installed longitudinally, with

rear-wheel drive Rear-wheel drive (RWD) is a form of engine and transmission layout used in motor vehicles, in which the engine drives the rear wheels only. Until the late 20th century, rear-wheel drive was the most common configuration for cars. Most rear-wheel ...

. The XUD is built in Citroën's plant in

Trémery Trémery (; german: Tremerchen) is a commune in the Moselle department in Grand Est in north-eastern France. Economy * Usine PSA de Trémery (PSA factory of Trémery), the biggest diesel engine factory in the world. Notable citizens Jean-Marie ...

, near

Metz Metz ( , , lat, Divodurum Mediomatricorum, then ) is a city in northeast France located at the confluence of the Moselle and the Seille rivers. Metz is the prefecture of the Moselle department and the seat of the parliament of the Grand E ...

. 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 shared with other XU engines. Upon its release the engine was noted as one of the best

s (for cars and light vans) 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 Indirect injection in an internal combustion engine is fuel injection where fuel is not directly injected into the combustion chamber. Gasoline engines equipped with indirect injection systems, wherein a fuel injector delivers the fuel at some po ...

, with a slower combustion burn time than direct injection, is suitable to run on SVO (pure

vegetable oil Vegetable oils, or vegetable fats, are oils extracted from seeds or from other parts of fruits. Like animal fats, vegetable fats are ''mixtures'' of triglycerides. Soybean oil, grape seed oil, and cocoa butter are examples of seed oils, or fat ...

). 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 pump An Injection Pump is the device that pumps fuel into the cylinders of a diesel engine. Traditionally, the injection pump was driven indirectly from the crankshaft by gears, chains or a toothed belt (often the timing belt) that also drives the cams ...

s, (in particular the weaker

Lucas Lucas or LUCAS may refer to: People * Lucas (surname) * Lucas (given name) Arts and entertainment * Luca Family Singers, also known as "lucas ligner en torsk" * ''Lucas'' (album) (2007), an album by Skeletons and the Kings of All Cities * ''L ...

CAV pump, the Bosch VE fuel pump is superior), 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 The term turbo-diesel, also written as turbodiesel and turbo diesel, refers to any diesel engine equipped with a turbocharger. As with other engine types, turbocharging a diesel engine can significantly increase its efficiency and power output, ...

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 Naturally may refer to: ;Albums * ''Naturally!'', an album by Nat Adderley * ''Naturally'' (Houston Person album) * ''Naturally'' (J. J. Cale album) * ''Naturally'' (John Pizzarelli album) * ''Naturally'' (Sharon Jones album) * ''Naturally'' ...

version or for the

model. An

intercooled An intercooler is a heat exchanger used to cool a gas after compression. Often found in turbocharged engines, intercoolers are also used in air compressors, air conditioners, refrigeration and gas turbines. Internal combustion engines Most ...

turbocharged version was introduced later, with on tap. All are Diesel engines.

XUD9

The XUD9 has a displacement of , with a bore and a stroke of . Both turbocharged and

versions were produced. Most turbocharged versions feature an intercooler, although a limited number of installations in the

Citroën Xantia The Citroën Xantia, pronounced "Zan–ti–a" is a large family car ( D) produced by the French automaker Citroën, and designed by Bertone. Presented to the press in December 1992, the car was produced between 1992 and 2002 in Europe, with a f ...

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 (and noticeably improved) 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 Hyundai is a South Korean industrial conglomerate ("chaebol"), which was restructured into the following groups: * Hyundai Group, parts of the former conglomerate which have not been divested ** Hyundai Mobis, Korean car parts company ** Hyundai ...

which was rated at 50kw. It was used in the European specification of the Lantra (1996–1999).

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 (Electronically Programmed Injection Control) fuel pump, whereas the ATE engines used a Bosch injection pump with a throttle cable.

Vehicles

The engine has been installed into the following vehicles:- *

Auverland Auverland (''Société nouvelle des automobiles Auverland''), now grouped with Panhard, is a French manufacturer of Jeep-like four-wheel-drive and armoured fighting vehicles. It bought Panhard from Peugeot in April 2005, and in a reverse takeov ...

A3 *

Citroën BX The Citroën BX is a large family car which was produced by the French manufacturer Citroën from 1982 to 1994. In total, 2,315,739 BXs were built during its 12-year history. The hatchback was discontinued in 1993 with the arrival of the Xantia, ...

Citroën Visa The Citroën Visa is a five-door, front-engine, front wheel drive supermini manufactured and marketed by Citroën from 1978 to 1988 in gasoline and diesel variants. 1,254,390 examples were ultimately manufactured over a single generation, with a ...

Citroën C15 The Citroën C15 is a panel van produced by the French manufacturer Citroën from late 1984 until 2005. It was the successor to the Citroën Acadiane, which had replaced the Citroën 2CV vans that pioneered the box van format from the 1950 ...

Citroën ZX The Citroën ZX is a small family car produced by the French manufacturer Citroën between 1991 and 1998. During the beginning of the 1990s, the ZX was Citroën's competitor in the class traditionally dominated in Europe by the Ford Escort and ...

Citroën Xsara The Citroën Xsara () is a compact car, compact C-segment family car, produced by the France, French automaker PSA Peugeot Citroën, under their Citroën marque, from 1997 to 2006. The Xsara was a development of the Citroën ZX and Peugeot 306, w ...

Citroën Berlingo The Citroën Berlingo and Peugeot Partner are a range of multi-purpose vehicles produced by the PSA Group and later by Stellantis. They are sold both as panel vans for use as commercial vehicles and as a passenger variant with rear seats and win ...

Citroën XM The Citroën XM is a front-engine, front-drive, five-passenger, five-door hatchback noted for its hydropneumatic suspension. Manufactured and marketed by Citroën from 1989 to 2000, with a minor facelift in 1994, XM production reached 333,405 ov ...

* Eurovan (PSA/Fiat joint venture)

Sevel Sevel S.p.A. (acronym of "Società Europea Veicoli Leggeri" - "Société Européenne de Véhicules Légers" (''European Light Vehicle Company'')) is an Italian automotive company which produces light commercial vehicles. It was first established ...

Nord **Citroën Evasion/Synergie/C8 **Citroën Jumpy (Dispatch in UK) **Fiat Ulysse **Fiat Scudo **Peugeot 806/807 **

Peugeot Expert Peugeot (, , ) is a French brand of automobiles owned by Stellantis. The family business that preceded the current Peugeot companies was founded in 1810, with a steel foundry that soon started making hand tools and kitchen equipment, and then ...

**Lancia Zeta/Phedra *

Sud - Larger Panel Van PSA/Fiat Ducato joint venture **

Citroën C25 The Fiat Ducato is a light commercial vehicle jointly developed by FCA Italy and PSA Group (currently Stellantis), and mainly manufactured by Sevel, a joint venture between the two companies since 1981. It has also been sold as the Citroën C25, ...

** Citroën Jumper (Relay in UK) **

Peugeot J5 The Fiat Ducato is a light commercial vehicle jointly developed by FCA Italy and PSA Group (currently Stellantis), and mainly manufactured by Sevel, a joint venture between the two companies since 1981. It has also been sold as the Citroën C ...

(Talbot Express in UK) **

Peugeot Boxer Peugeot (, , ) is a French brand of automobiles owned by Stellantis. The family business that preceded the current Peugeot companies was founded in 1810, with a steel foundry that soon started making hand tools and kitchen equipment, and the ...

FSO Polonez The FSO Polonez is a motor vehicle that was developed in Poland in collaboration with Fiat and produced by Fabryka Samochodów Osobowych from 1978 to 2002. It was based on the Polski Fiat 125p platform with a new hatchback design by Giorgetto G ...

/Caro *

Honda Concerto The Honda Concerto is a mid-sized luxury sedan produced from 1988 to 1994. The Concerto was designed for European tastes and jointly developed by Honda and the Austin Rover Group and was introduced in Japan on 15 June 1988, and in European marke ...

(badge engineered Rover 200 diesel for European market) * Hyundai Lantra *

Lada Niva The Lada Niva Legend, formerly called the Lada Niva, VAZ-2121, VAZ-2131, and Lada 4×4 (russian: link=no, ВАЗ-2121, ВАЗ-2131, Лада Нива), is a series of four-wheel drive, small (hatchback), and compact (wagon and pickup) off-road c ...

* LDV 200/Pilot *

Peugeot 205 The Peugeot 205 is a supermini (B-segment) car produced by the French manufacturer Peugeot from 1983 to 1999. It was declared "car of the decade" by ''CAR Magazine'' in 1990. It also won ''What Car?s Car of the Year for 1984. The 205 was intro ...

Peugeot 305 The Peugeot 305 is a medium-sized car produced by the French automaker Peugeot from 1977 to 1989. It was offered as a four-door saloon, five-door estate, and as a three-door van body derivative. History Origins During the mid 1970s, the motoring ...

Peugeot 306 The Peugeot 306 is a small family car built by the French car manufacturer Peugeot from 1993 to 2002. It replaced the 309. Peugeot gave the 306 many updates and aesthetic changes to keep up with the competition, and it was replaced by the 307 in ...

Peugeot 309 The Peugeot 309 is a small family car that was manufactured between 1985 and 1994 in England, Spain and France by PSA Peugeot Citroën. It was originally intended to be badged as a Talbot and, as development progressed, to be called the Talbot ...

* Peugeot 405 *

Peugeot 406 The Peugeot 406 is a large family car that was produced by French automaker Peugeot between 1995 and 2004. Available in saloon, estate and coupé bodystyles with a choice of petrol or turbodiesel engines, the 406 replaced the Peugeot 405 in P ...

Peugeot 605 The Peugeot 605 is an executive car produced by the French manufacturer Peugeot between 1989 and 1999, with a facelift in 1995. History The 605 was a saloon built on the same platform as the Citroën XM and was the successor to the critically ...

Peugeot Partner Peugeot (, , ) is a French brand of automobiles owned by Stellantis. The family business that preceded the current Peugeot companies was founded in 1810, with a steel foundry that soon started making hand tools and kitchen equipment, and then ...

Suzuki Baleno The Suzuki Baleno nameplate has been used by the Japanese manufacturer Suzuki to denote several different subcompact cars since 1996. * From 1996 to 2002, the Suzuki Baleno that was sold in Europe and Asia-Pacific was a rebadged Suzuki Cultus C ...

* Suzuki Samurai (Santana) * Suzuki Vitara (Santana) *

Talbot Horizon The horizon is the apparent line that separates the surface of a celestial body from its sky when viewed from the perspective of an observer on or near the surface of the relevant body. This line divides all viewing directions based on whether i ...

Tata Telcoline The Tata Telcoline is a mid-size pickup truck made by the Indian automaker Tata Motors since 1988. In India, it was originally known as the Tatamobile 206, and since 2002, the name was changed to the Tata 207 DI. In export markets, it has been ...

/ Tata Telcosport *

Rover 200 The Rover 200 Series, and later the Rover 25, are a series of small family cars that were produced by British manufacturer Rover from 1984 until 2005. There have been three distinct generations of the Rover 200. The first generation was a four ...

Rover 400 The Rover 400 Series, and later the Rover 45, are a series of small family cars that were produced by the British manufacturer Rover from 1990 to 2005. The cars were co-developed as part of Rover's collaboration with Honda. The first-generation ...

* UMM ALTER 2000

References

Guide des moteurs Peugeot Citroën
(in French) {{DEFAULTSORT:Psa Xud

XUD The PSA XUD is a diesel engine designed and built by PSA - Peugeot and Citroën. It is an Indirect injection (IDI) engine, that uses a version of the Ricardo Consulting Engineers ''Ricardo Comet V'' prechamber cylinder head design. The engine ...

Diesel engines by model Straight-four engines fr:XU (moteur)