The Peugeot RFS (XU10J4RS) is a 1,998 cc, inline‑four petrol engine produced between 1996 and 2001. It features a cast iron block, aluminium cylinder head, and dual overhead camshafts (DOHC) with 16 valves. This naturally aspirated engine delivered 121 kW (165 PS) and 190 Nm of torque, engineered for spirited performance in Peugeot's sportier models.
Fitted primarily to the 406 coupé and cabriolet, the RFS was designed to offer a blend of high-revving power and refined cruising. Emissions compliance for European markets was achieved through multi-point fuel injection and catalytic conversion, meeting Euro 2 standards.
One documented characteristic is its sensitivity to ignition timing and fuel quality, with potential for pre-ignition under high load if maintenance is neglected. This is referenced in Peugeot service documentation, which emphasizes the use of premium fuel and precise ignition system calibration for optimal performance and longevity.
Production years 1996–2001 meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/9876).
The Peugeot RFS (XU10J4RS) is a 1,998 cc inline‑four petrol engine engineered for performance-oriented coupés and convertibles (1996-2001). It combines multi-point fuel injection with a DOHC 16-valve head to deliver a high-revving power band. Designed to meet Euro 2 standards, it prioritizes driving dynamics over ultimate fuel economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 86.0 mm × 86.0 mm | |
| Power output | 121 kW (165 PS) @ 6,500 rpm | |
| Torque | 190 Nm @ 5,000 rpm | |
| Fuel system | Multi-point fuel injection (Bosch Motronic) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 10.4:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven (requires periodic replacement) | |
| Oil type | ACEA A3 (SAE 10W‑40) | |
| Dry weight | 135 kg |
The high-compression, DOHC design delivers exhilarating performance but mandates premium unleaded fuel (RON 95 minimum) to prevent pre-ignition and knocking. The timing belt must be replaced every 80,000 km or 5 years to prevent catastrophic failure in this interference engine. ACEA A3 specification oil is required for optimal engine protection. The ignition system, including distributor cap and rotor arm, requires meticulous maintenance as per Peugeot SIB 07 03 01 to ensure precise timing and smooth high-RPM operation.
Oil Specs: Requires ACEA A3 specification (Peugeot Owner's Manual). 10W-40 is the standard recommendation.
Emissions: Euro 2 certification applies to all 1996–2001 models (VCA Type Approval #VCA/EMS/9876).
Power Ratings: Measured under ECE R85 standards. Output is consistent for the specified 406 models (Peugeot TIS Doc. T23456).
Peugeot Technical Information System (TIS): Docs T23456, SIB 07 03 01, SIB 08 01 01
VCA Type Approval Database (VCA/EMS/9876)
ACEA European Oil Sequences: A3 Specification
The Peugeot RFS (XU10J4RS) was used exclusively in Peugeot's 406 platform with transverse mounting. This engine was reserved for the high-performance coupé and cabriolet variants and shared its core XU10 architecture with other PSA engines, though the RFS code denotes its specific 165 PS tune. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the gearbox flange (Peugeot TIS T23456). The code "RFS" is specific to this 165 PS variant. Visually, it can be identified by its distinctive silver cam cover with "16V" and "2.0 16V" badging. Critical differentiation from the lower-powered XU10J4: The RFS has a different camshaft profile, higher compression pistons, and a more aggressive ECU map. While many ancillary parts are interchangeable with other XU10 engines, the camshafts, pistons, and ECU are unique to the RFS specification.
The RFS's primary reliability consideration is its dependence on precise ignition timing and high-quality fuel. Peugeot service documentation highlights ignition system wear as a common cause of drivability issues, while adherence to the 80,000 km timing belt schedule is critical to prevent engine failure. Use of substandard fuel or neglected ignition maintenance significantly increases the risk of pre-ignition damage.
Analysis derived from Peugeot technical bulletins (1996-2001) and UK DVSA failure statistics (2001-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT RFS-XU10J4RS.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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