The Peugeot 142 (XR5A) is a 1,360 cc, inline‑four petrol engine produced between 1983 and 1990. It features a single overhead camshaft (SOHC) and two valves per cylinder, designed for durability and ease of maintenance in compact family cars. In standard form, it delivered approximately 55 kW (75 PS), providing adequate performance for its era.
Fitted primarily to the Peugeot 205 and 309, the XR5A engine was engineered for balanced economy and reliability. Its robust cas…
Production years 1983–1990 predate formal Euro standards; emissions compliance was managed under national regulations applicable at time of manufacture (VCA UK Type Approval #VCA/EMS/6789).
The Peugeot 142 (XR5A) is a 1,360 cc inline‑four petrol engine engineered for compact family cars (1983-1990). It combines a simple SOHC valvetrain with a carburettor or single-point injection to deliver reliable, economical performance. Designed for reliability under basic national emissions regulations, it prioritises serviceability and cost-effective ownership.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,360 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 75.0 mm × 77.0 mm | |
Power output | 55 kW (75 PS) @ 5,800 rpm | |
Torque | 105 Nm @ 3,400 rpm | |
Fuel system | Carburettor or Single‑point injection | |
Emissions standard | Pre‑Euro (National Regulations) | |
Compression ratio | 9.2:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt‑driven camshaft | |
Oil type | SAE 10W‑40 (Mineral or Semi‑Synthetic) | |
Dry weight | 105 kg |
The Peugeot 142 (XR5A) was used across Peugeot's 205 and 309 platforms with transverse mounting. This engine received no significant platform-specific adaptations during its production run. All adaptations are documented in OEM technical bulletins.
The XR5A's primary reliability risk is timing belt failure due to neglected maintenance, with elevated incidence in high-mileage or poorly serviced vehicles. Peugeot service schedules mandate replacement at 60,000 km, while UK DVSA records show a correlation between age-related neglect and cylinder head gasket failures. Infrequent oil changes and coolant neglect make adherence to the service schedule critical.
Analysis derived from Peugeot technical bulletins (1983-1990) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The XR5A is mechanically simple and robust if meticulously maintained. Its critical failure point is the timing belt; neglect leads to catastrophic engine damage. With strict adherence to the 60,000 km belt change interval and regular oil/coolant changes, these engines can easily exceed 200,000 km. Neglect, however, leads to expensive failures.
The most critical issue is timing belt failure. Other common problems include cylinder head gasket leaks, distributor drive gear wear causing ignition faults, and carburettor/SPI system faults causing running issues. Cooling system corrosion can also lead to overheating problems in neglected examples.
The XR5A engine was used in the Peugeot 205 (1983-1990) and Peugeot 309 (1985-1990) across various 1.4-litre trim levels including GR, GL, SR, and Rallye versions. It was not used in other Peugeot models or licensed to other manufacturers.
Minor tuning is possible. Upgrading the carburettor or ECU remapping the SPI system can yield small gains (5-10 PS). More significant power increases require internal modifications (e.g., higher compression pistons, camshaft) which are complex and costly for this engine, making it less popular for tuning than its successor, the TU engine.
Good for its era. A well-maintained Peugeot 205 or 309 with the XR5A engine can achieve 6.5-7.0 L/100km (40-43 mpg UK) on a combined cycle. In city driving, expect around 8.0 L/100km (35 mpg UK), and on the highway, figures can drop to 5.5 L/100km (51 mpg UK).
Yes. This is critically important. If the timing belt breaks or slips, the pistons will collide with the open valves, causing severe and expensive damage to the engine's internals. This makes adhering to the timing belt replacement schedule non-negotiable.
Peugeot recommends a good quality mineral or semi-synthetic 10W-40 engine oil meeting ACEA A3/B3 or equivalent specifications. Regular oil changes (every 10,000 km or annually) are crucial for engine longevity, especially given the engine's age and design.
Comprehensive technical documentation and regulatory references
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PEUGEOT Official Site
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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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