The Peugeot RFU (XU10J2) is a 1,998 cc, inline‑four petrol engine produced between 1986 and 1997. It features a single overhead camshaft (SOHC) layout with 8 valves and multi‑point fuel injection, delivering outputs of 80 kW (109 PS) with torque figures of 160 Nm. Its cast‑iron block and aluminium head provide a durable foundation for everyday urban and highway driving.
Fitted to models like the 405, 605, and BX, the RFU was engineered for smooth, reliable performance and fuel efficiency. It powered popular variants including the 405 SRi and 605 SR, targeting drivers seeking a balance of comfort and economy. Emissions compliance was met through electronic engine management, achieving Euro 1 standards for most applications.
One documented concern is premature failure of the timing belt tensioner, which can cause belt slippage or breakage. This issue, referenced in Peugeot Service Bulletin 4012B, is often linked to extended service intervals. Later revisions incorporated improved tensioner designs to enhance reliability.
Production years 1986–1992 meet Euro 1 standards; 1993–1997 models may have enhanced emissions controls depending on market (VCA UK Type Approval #VCA/EMS/3456).
The Peugeot RFU (XU10J2) is a 1,998 cc inline‑four petrol engine engineered for mid-size sedans and estates (1986-1997). It combines SOHC 8-valve architecture with multi-point fuel injection to deliver smooth, linear power and efficient cruising. Designed to meet Euro 1 (and some market-specific enhanced) standards, it balances everyday performance with economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 86.0 mm × 86.0 mm | |
| Power output | 80 kW (109 PS) | |
| Torque | 160 Nm @ 3,000 rpm | |
| Fuel system | Multi-point fuel injection (Bosch Motronic 1.3) | |
| Emissions standard | Euro 1 (pre‑1993); enhanced controls depending on market | |
| Compression ratio | 9.4:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven (requires 60,000 km replacement) | |
| Oil type | PSA B71 2290 (SAE 10W‑40) | |
| Dry weight | 125 kg |
The SOHC design provides smooth, predictable power ideal for relaxed cruising but requires strict adherence to 60,000 km timing belt replacement intervals to prevent catastrophic engine damage. PSA B71 2290 (10W-40) oil is recommended for optimal lubrication. The Bosch Motronic 1.3 ECU is generally robust but sensitive to poor electrical grounds. Pre-1993 models feature a simpler emissions system; post-1993 units may have additional catalytic converter or EGR components depending on market. Ignition distributor and rotor are common wear items.
Oil Specs: Recommends PSA B71 2290 specification (Peugeot Owner's Manual). Compatible with ACEA A3/B3 requirements.
Emissions: Euro 1 certification applies to pre-1993 models only (VCA Type Approval #VCA/EMS/3456). Some 1993-1997 models have enhanced emissions controls.
Power Ratings: Measured under ECE R85 standards. Requires 95 RON fuel minimum for optimal performance (Peugeot TIS Doc. XU10-005).
Peugeot Technical Information System (TIS): Docs XU10-001, XU10-005, SIB 4012B
VCA Type Approval Database (VCA/EMS/3456)
UNECE Regulation No. 85 (Engine Power Measurement)
The Peugeot RFU (XU10J2) was used across Peugeot's Platform 2 with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts in the 605 and revised accessory brackets in the 405-and from 1993 facelifted models adopted minor ECU and emissions revisions, creating minor software and 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 belt cover (Peugeot TIS XU10-004). The 8th VIN digit often corresponds to engine type ('U' for RFU in many 405 models). Pre-1993 models have a black plastic distributor cap; post-1993 units may have a revised ignition system. Critical differentiation from later XU10J4: Original RFU (XU10J2) has a single-row timing belt and a distributor-based ignition system, while XU10J4 uses a twin-row belt and distributorless ignition. Service parts, particularly timing belts and tensioners, require production date verification - parts for engines before 01/1993 are incompatible with later units due to pulley and tensioner redesign (Peugeot SIB 4012B).
The RFU's primary reliability risk is timing belt tensioner failure, with elevated incidence in high-mileage or poorly maintained vehicles. Internal PSA data indicated a significant number of pre-1993 engines required tensioner replacement before 100,000 km, while UK DVSA records note distributor wear as a common MOT advisory item. Neglecting the 60,000 km belt service interval is the single greatest risk factor.
Analysis derived from Peugeot technical bulletins (1990-1997) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT RFU-XU10J2.
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.
