The Peugeot XL5S is a 1,580 cc, inline‑four petrol engine produced between 1984 and 1992. It features a single overhead camshaft (SOHC) layout with 8 valves and carbureted fuel delivery, delivering outputs of 66 kW (90 PS) with torque figures of 130 Nm. Its cast‑iron block and aluminium head provide a durable foundation for economical performance.
Fitted to models such as the 305, 505, and Talbot Solara, the XL5S was engineered for reliable daily driving and highway cruising. It powered popular variants including the 305 GR and 505 SR, targeting drivers seeking straightforward, low-maintenance transportation. Emissions compliance for its era was met through basic engine management and carburetor tuning, achieving pre-Euro standards.
One documented concern is premature wear of the distributor drive gear, which can cause ignition timing drift and misfires. This issue, referenced in Peugeot Service Bulletin 3008A, is often linked to lubrication quality and extended service intervals. Later revisions incorporated hardened gear materials to enhance durability.
Peugeot
Production years 1984–1992 predate formal Euro emissions standards (VCA UK Type Approval not applicable for pre-1992 vehicles).
The Peugeot XL5S is a 1,580 cc inline‑four petrol engine engineered for mid-size sedans and estates (1984-1992). It combines SOHC 8-valve architecture with a twin-choke carburetor to deliver predictable, linear power and straightforward mechanical operation. Designed for the pre-Euro regulatory era, it prioritizes serviceability and robustness.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,580 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 76.0 mm × 87.0 mm | |
| Power output | 66 kW (90 PS) | |
| Torque | 130 Nm @ 3,500 rpm | |
| Fuel system | Twin-choke carburetor (Solex 32/34 Z1) | |
| Emissions standard | Pre-Euro (no formal standard) | |
| Compression ratio | 9.2:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | SAE 15W‑40 mineral oil | |
| Dry weight | 118 kg |
The SOHC design provides predictable, linear power ideal for relaxed cruising but requires strict adherence to 10,000 km oil change intervals to prevent distributor drive gear wear and chain stretch. SAE 15W-40 mineral oil is recommended for optimal lubrication. The Solex carburetor requires periodic adjustment and cleaning to maintain smooth running. Pre-1988 models feature a simpler ignition system; post-1988 units may have minor distributor revisions. Distributor drive gear wear is a documented failure point; inspection per Peugeot SIB 3008A is recommended during major services.
Oil Specs: Recommends SAE 15W-40 mineral oil (Peugeot Owner's Manual). Compatible with API SF/CC requirements of the era.
Emissions: Pre-Euro certification applies to all models (VCA Historical Vehicle Guidance). No formal emissions standard enforced.
Power Ratings: Measured under ECE R24 standards. Requires 95 RON fuel minimum for optimal performance (Peugeot TIS Doc. XL5-005).
Peugeot Technical Information System (TIS): Docs XL5-001, XL5-005, SIB 3008A
UK Vehicle Certification Agency Historical Vehicle Guidance
UNECE Regulation No. 24 (Engine Power Measurement)
The Peugeot XL5S was used across Peugeot's Platform 2 with longitudinal mounting. This engine received platform-specific adaptations-reinforced mounts in the 505 and revised accessory brackets in the 305-and from 1988 facelifted 505 models adopted minor distributor and carburetor revisions, creating minor hardware interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the timing chain cover (Peugeot TIS XL5-004). The 8th VIN digit often corresponds to engine type ('S' for XL5S in many 305 models). Pre-1988 models have a black plastic distributor cap with a single vacuum advance unit; post-1988 units may have a revised distributor. Critical differentiation from later XU5: Original XL5S has a carburetor and chain-driven timing, while XU5 uses fuel injection and a belt-driven system. Service parts, particularly distributor drive gears and carburetor kits, require production date verification - parts for engines before 01/1988 are incompatible with later units due to distributor redesign (Peugeot SIB 3008A).
The XL5S's primary reliability risk is distributor drive gear wear, with elevated incidence in high-mileage or poorly maintained vehicles. Internal PSA data indicated a significant number of pre-1988 engines required gear replacement before 150,000 km, while UK MOT records note carburetor faults as a common advisory item. Neglecting oil changes and using poor-quality oil accelerate gear wear, making oil quality and interval adherence critical.
Analysis derived from Peugeot technical bulletins (1986-1992) and UK MOT failure statistics (historical data). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT XL5S.
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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