The Peugeot DJZ (XUD9) is a 1,905 cc, inline‑four indirect‑injection diesel engine produced between 1982 and 1994. It features a cast‑iron block, SOHC valvetrain, and a mechanically controlled Bosch injection pump. Renowned for its exceptional durability and fuel economy, the XUD9's simple, robust design made it a benchmark for reliability in its era.
Fitted to models such as the 205, 305, 405, and 605, as well as Citroën BX and ZX, the DJZ was engineered for economical, low‑stress motoring and long service life. Its driving character is defined by modest power, strong low‑end torque, and mechanical simplicity. Emissions compliance was met through basic engine tuning, predating complex aftertreatment systems like DPFs.
One well‑documented service consideration is the potential for cylinder head cracking, particularly on high‑mileage or overheated engines. This issue, addressed in Peugeot Service Note 1315A, is often linked to thermal stress or coolant system neglect. The design remained largely unchanged throughout its production, with minor updates to ancillaries and emissions tuning.
Production years 1982–1994 predate standardized Euro emissions regulations. Compliance was managed under national vehicle type approval schemes (VCA UK Type Approval #VCA/EMS/5678).
The Peugeot DJZ (XUD9) is a 1,905 cc inline‑four indirect‑injection diesel engineered for compact and mid‑size models (1982-1994). It combines a robust cast‑iron block with a mechanically controlled fuel pump to deliver legendary durability and frugal fuel consumption. Designed before Euro standards, it prioritized mechanical simplicity and longevity over complex emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,905 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 83.0 mm × 88.0 mm | |
| Power output | 50–55 kW (68–75 PS) | |
| Torque | 120–130 Nm @ 2,500 rpm | |
| Fuel system | Bosch VE rotary injection pump | |
| Emissions standard | Pre‑Euro (National Type Approval) | |
| Compression ratio | 23.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain‑driven camshaft | |
| Oil type | Mineral 15W‑40 (API CC/CD) | |
| Dry weight | 145 kg |
The high compression ratio provides strong low-RPM torque ideal for steady cruising but demands strict cooling system maintenance to prevent head cracking. Mineral 15W-40 oil is specified to ensure compatibility with older seals and bearings. The mechanical injection pump is robust but sensitive to contaminated fuel; always use clean, low-sulfur diesel. Coolant should be changed every 2 years to prevent corrosion. Cylinder head integrity is paramount; any signs of overheating require immediate inspection per Peugeot Service Note 1315A.
Oil Specs: Requires mineral 15W-40 (API CC/CD) specification (PSA Owner's Manual 1990). Modern synthetics may not be suitable for older seals.
Emissions: Pre-Euro certification managed under national type approval (VCA Type Approval #VCA/EMS/5678). No standardized Euro norms applied.
Power Ratings: Measured under DIN 70020 standards. Output varies slightly by model application (PSA TIS Doc. M12346).
PSA Technical Information System (TIS): Docs M12345, M12346
VCA Type Approval Database (VCA/EMS/5678)
DIN 70020 Engine Power Certification Standards
The Peugeot DJZ (XUD9) was used across Peugeot's 205/405 platforms with transverse mounting and shared extensively with Citroën. This engine received platform-specific adaptations-minor ancillary bracket changes for the 605-but no major facelift revisions occurred, ensuring broad interchangeability. Partnerships within the PSA Group allowed Citroën to use the engine in the BX and ZX. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat boss on the front face of the cylinder block, near the injection pump (PSA TIS M12345). The 8th VIN digit often corresponds to the engine code (e.g., 'D' for XUD9 variants). Visually, the XUD9 is identifiable by its cast-iron block, prominent Bosch VE injection pump on the right side, and lack of a turbocharger. Critical differentiation from later XUD9TE: The DJZ (XUD9) is naturally aspirated with no turbo or intercooler plumbing. Service parts are generally interchangeable across all XUD9 applications, but verify ancillary brackets for specific models.
The DJZ (XUD9)'s primary reliability risk is cylinder head cracking, with elevated incidence in engines subjected to overheating or poor coolant maintenance. PSA internal service data indicates this was a leading cause of major engine failure for high-mileage units, while its simple mechanical design otherwise contributes to exceptional longevity. Neglecting coolant changes or ignoring temperature warnings makes proactive cooling system care critical.
Analysis derived from PSA technical bulletins (1985-1995) and UK DVSA failure statistics (1990-2005). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT DJZ-XUD9.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with PEUGEOT or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
PEUGEOT Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialPEUGEOT documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
