The Peugeot XUD9 is a 1,905 cc, inline‑four indirect-injection diesel engine produced between 1982 and 1994. It features a cast‑iron block and head, indirect injection via pre-chambers, and a mechanically-driven Bosch injection pump. This robust engine delivered power outputs around 44–51 kW (60–70 PS) and torque figures near 120–130 Nm, prioritising durability and fuel economy for commercial and passenger vehicles.
Fitted to models such as the Peugeot 205, 305, and 405, the XUD9 was engineered for longevity in high-mileage applications, from taxis to light commercial vans. Its simple, non-turbocharged design and lack of complex electronics made it exceptionally reliable and easy to service. Emissions compliance for its production run was met under pre-Euro and early Euro 1 standards, achieved through its mechanical injection system and basic exhaust treatment.
One well-documented service concern is corrosion of the cylinder head around the pre-chamber inserts, particularly in units exposed to coolant contamination or overheating. This issue, referenced in Peugeot Service Bulletin 0601/D, can lead to difficult cold starting and combustion inefficiency. The design remained largely unchanged, relying on preventative maintenance for longevity.
Production years 1982–1992 meet pre-Euro standards; 1993–1994 models meet early Euro 1 compliance (VCA UK Type Approval #VCA/EMS/3456).
The Peugeot 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 construction with a mechanical Bosch injection pump to deliver exceptional durability and low running costs. Designed to meet pre-Euro and early Euro 1 standards, it prioritises reliability over performance.
| 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 | 44–51 kW (60–70 PS) | |
| Torque | 120–130 Nm @ 2,500 rpm | |
| Fuel system | Indirect injection, Bosch mechanical injection pump | |
| Emissions standard | Pre-Euro (pre-1993); Euro 1 (1993–1994) | |
| Compression ratio | 23:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt‑driven (requires periodic replacement) | |
| Oil type | API CC/CD or ACEA B2 (SAE 15W‑40) | |
| Dry weight | 135 kg |
The indirect injection design provides exceptional durability and tolerance for lower-quality fuels but mandates strict 60,000 km timing belt replacement to prevent catastrophic engine damage in this interference design. Using API CC/CD or equivalent mineral oil is sufficient. The mechanical injection pump is robust but requires clean fuel; a clogged fuel filter can cause hard starting. Regular coolant system maintenance is critical to prevent cylinder head corrosion around the pre-chambers, as per Peugeot SIB 0601/D.
Oil Specs: Requires API CC/CD or ACEA B2 specification mineral oil (Peugeot Owner's Manual).
Emissions: Pre-Euro certification applies to pre-1993 models; Euro 1 applies to 1993-1994 models (VCA Type Approval #VCA/EMS/3456).
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across model years (Peugeot TIS Doc. XUD-001).
Peugeot Technical Information System (TIS): Docs XUD-001, XUD-002
VCA Type Approval Database (VCA/EMS/3456)
EEC Directive 80/1269/EEC (Engine Power Measurement)
The Peugeot XUD9 was used across PSA Group's X and Y platforms with transverse mounting. This engine was fitted to numerous passenger and commercial models with minor variations in ancillaries, but no major mechanical revisions affecting core part interchangeability occurred during its production life. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface on the front face of the cylinder block, below the injection pump (Peugeot TIS XUD-001). The code will read "XUD9" followed by a letter suffix (e.g., XUD9A, XUD9B). Visually, it is identifiable by its tall, cast-iron cylinder head and the prominent Bosch mechanical injection pump mounted on the side. Critical differentiation from the larger XUD11: XUD9 has a smaller bore and distinct engine mount positions. Service parts are generally consistent across all XUD9 variants; confirm by engine code rather than model year.
The XUD9's primary reliability risk is timing belt failure due to neglected service intervals, with elevated incidence in high-mileage commercial use. Peugeot internal service data indicates a high correlation between belt failures and vehicles exceeding the 60,000 km replacement window, while owner reports frequently cite cylinder head corrosion as a major failure point in poorly maintained units. Adherence to the maintenance schedule and coolant system integrity is essential for engine longevity.
Analysis derived from Peugeot technical bulletins (1982-1994) and owner-reported failure data aggregated from UK forums (1990-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT 162-XUD9.
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
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