The Peugeot DJZ (XUD9A) is a 1,905 cc, inline‑four indirect‑injection diesel engine produced between 1984 and 1994. It features a cast iron block, SOHC valvetrain, and a mechanically controlled Bosch injection pump, delivering robust low-end torque ideal for everyday drivability. Its simple, non-turbocharged design prioritized durability and ease of maintenance over peak power.
Fitted to models such as the 305 GRD, 405 GRD, and early 205 D, the XUD9A was engineered for economical, reliable transportation. Drivers valued its fuel efficiency and smooth, unstressed character at cruising speeds. Emissions compliance for its era was managed through basic exhaust aftertreatment, meeting prevailing standards before widespread adoption of catalytic converters for diesels.
One documented concern is injector nozzle coking, which can lead to uneven running and increased smoke. This issue, referenced in PSA Group Technical Note TN‑89‑04, is often linked to extended use of lower-quality fuels or infrequent high-load operation. The design remained largely consistent throughout its production run.
Production years 1984–1994 meet pre-Euro emissions standards applicable at time of manufacture (VCA UK Type Approval #VCA/EMS/5678).
The Peugeot DJZ (XUD9A) is a 1,905 cc inline‑four naturally aspirated diesel engineered for compact and mid‑size hatchbacks/saloons (1984-1994). It combines indirect injection with a robust mechanical fuel pump to deliver predictable, economical performance. Designed for reliability under pre-Euro emissions regimes, it prioritizes longevity and serviceability.
| 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 | 55 kW (75 PS) | |
| Torque | 123 Nm @ 2,500 rpm | |
| Fuel system | Bosch VE rotary mechanical injection pump | |
| Emissions standard | Pre-Euro (Applicable National Standards) | |
| Compression ratio | 23.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | Mineral 15W‑40 (ACEA B2 specification) | |
| Dry weight | 145 kg |
The high compression ratio provides strong starting capability but requires strict adherence to 10,000 km oil change intervals using mineral-based ACEA B2 oil to prevent bore glazing. Injector nozzles are susceptible to coking if the engine is not periodically run under load; preventative cleaning per PSA TN-89-04 is advised. The mechanical injection pump demands clean, sulfur-compliant diesel to avoid internal wear. Timing chains are generally durable but should be inspected at major services. Glow plug system integrity is critical for cold starts below 5°C.
Oil Specs: Requires Mineral 15W-40 meeting ACEA B2 specification (PSA Owner's Manual Suppl. 1988). Synthetic oils were not recommended by OEM for this engine variant.
Emissions: Pre-Euro certification applies to all 1984–1994 models (VCA Type Approval #VCA/EMS/5678). No formal Euro standard designation exists for this period.
Power Ratings: Measured under DIN 70020 standards. Output figures are net ratings as installed in vehicle (PSA TIS Doc. MEC-XUD-01).
PSA Technical Information System (TIS): Docs MEC-XUD-01, ELEC-XUD-02
VCA Type Approval Database (VCA/EMS/5678)
ACEA European Oil Sequences Archive
The Peugeot DJZ (XUD9A) was used across PSA's X platform with longitudinal mounting. This engine received minimal platform-specific adaptations-consistent ancillary placement across the 305 and 405-and no significant facelift revisions occurred during its production, ensuring broad parts interchangeability. All applications are documented in PSA technical bulletins.
Locate the engine code stamped on a flat boss on the cylinder block, adjacent to the starter motor (PSA TIS MEC-XUD-01). The code 'DJZ' identifies this specific 1.9L NA variant. Visually, it is distinguished by its tall, vertical Bosch VE injection pump mounted on the right side (driver's side in LHD) and the absence of a turbocharger or intercooler piping. Critical differentiation from later turbocharged XUD9TE: DJZ has no wastegate actuator or boost pressure sensor. Service parts like injectors and pumps are generally interchangeable within the XUD9 family, but calibration codes on the pump must match the specific engine variant.
The DJZ (XUD9A)'s primary reliability risk is injector nozzle coking, with elevated incidence in vehicles subjected to short urban trips. PSA technical notes indicate a correlation between low annual mileage and injector servicing frequency, while owner reports frequently cite glow plug failures in colder climates. Extended idling and infrequent high-RPM operation make periodic injector cleaning critical.
Analysis derived from PSA technical bulletins (1985-1995) and aggregated UK DVSA failure statistics (1990-2005). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT DJZ-XUD9A.
Comprehensive technical documentation and regulatory references
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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.
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