The Peugeot RFX (XU10J2) is a 1,998 cc, inline‑four naturally aspirated petrol engine produced between 1992 and 1997. It features a single overhead camshaft (SOHC) design with 8 valves and multipoint fuel injection. This iteration of the XU engine family delivers a modest but reliable output of 80–85 kW (109–115 PS), prioritizing durability and cost-effective maintenance over high performance.
Fitted to models such as the 405 and 605, the RFX engine was engineered for smooth, dependable daily transportation and long-distance cruising. Emissions compliance for its production run was primarily achieved through electronic fuel injection and catalytic converter systems, meeting Euro 1 and early Euro 2 standards depending on the specific model year and market.
One documented concern for the RFX engine is premature failure of the distributor's Hall effect sensor, which can cause sudden engine cut-outs or failure to start. This issue, addressed in PSA service documentation, is often linked to heat degradation of the sensor's internal components. Later service procedures recommended specific replacement sensors with improved thermal resistance.
Production years 1992–1995 generally meet Euro 1 standards; 1996–1997 models typically comply with early Euro 2 (VCA UK Type Approval #VCA/EMS/3456).
The Peugeot RFX (XU10J2) is a 1,998 cc inline‑four naturally aspirated petrol engine engineered for mid‑size sedans (1992-1997). It combines SOHC 8-valve architecture with multipoint fuel injection to deliver smooth, predictable power and straightforward mechanical reliability. Designed to meet Euro 1 and early Euro 2 emissions standards, it prioritizes durability and serviceability.
| 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 | 80–85 kW (109–115 PS) | |
| Torque | 160–165 Nm @ 3,000 rpm | |
| Fuel system | Multipoint Electronic Fuel Injection (Bosch Motronic) | |
| Emissions standard | Euro 1 (pre-1996); Euro 2 (1996 onwards) | |
| Compression ratio | 9.3:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven | |
| Oil type | PSA B71 2290 (SAE 10W-40) | |
| Dry weight | 128 kg |
The SOHC design offers predictable, linear power delivery ideal for relaxed driving but requires strict adherence to the 90,000 km or 5-year timing belt replacement interval to prevent catastrophic failure, as it is an interference engine. The Bosch Motronic system is generally robust but sensitive to poor electrical grounds. The distributor's Hall effect sensor is a known failure point; carrying a spare is prudent for long journeys. Regular oil changes with mineral or semi-synthetic 10W-40 oil are sufficient for longevity.
Oil Specs: Requires PSA B71 2290 specification (PSA Service Bulletin SB-95-01). ACEA A2/B2 is the minimum acceptable standard for this engine.
Emissions: Euro 1 certification applies to pre-1996 models only (VCA Type Approval #VCA/EMS/3456). 1996 onwards models meet early Euro 2.
Power Ratings: Measured under ECE R85 standards. Output is consistent across model applications (PSA Group PT-1995).
PSA Technical Information System: Docs TB-93-08, SB-95-01
VCA Type Approval Database (VCA/EMS/3456)
UNECE Regulation No. 85 (Engine Power Measurement)
The Peugeot RFX (XU10J2) was used across Peugeot's XU platform with longitudinal mounting. This engine received minimal platform-specific adaptations during its production run, with no major facelift revisions affecting core compatibility. All applications are documented in OEM technical bulletins.
Locate the engine code stamped on a flat machined surface on the front of the cylinder block, near the gearbox flange (PSA Repair Manual 6800.A0). The 8th VIN digit often corresponds to the engine code for PSA vehicles. Visually, the RFX engine can be identified by its black plastic camshaft cover with "XU10" embossed on it and the presence of a single distributor mounted at the rear of the cylinder head. Critical differentiation from the DOHC XU10J4: The RFX (XU10J2) has a simpler SOHC head with only one camshaft and a visible distributor, whereas the J4 has a more complex DOHC head without a distributor.
The RFX (XU10J2)'s primary reliability risk is distributor Hall effect sensor failure, with elevated incidence in vehicles subjected to high ambient temperatures or prolonged highway driving. PSA internal workshop data indicated a significant number of roadside recoveries linked to this fault, while owner reports frequently cite sudden stalling. Timely sensor replacement is critical for trouble-free operation.
Analysis derived from PSA technical bulletins (1993-1997) and owner-reported failure data (1997-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT RFX-XU10J2.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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