The Peugeot RFY (XU10J4Z) is a 1,998 cc, inline‑four naturally aspirated petrol engine produced between 1996 and 2001. It features double overhead camshafts (DOHC), 16 valves, and multi‑point fuel injection. In standard specification, it delivered 99 kW (135 PS) and 188 Nm of torque, offering a sporty character for its era.
Fitted primarily to the 406 coupé and saloon, the RFY engine was engineered for spirited performance and a broad power band. Emissions compliance for its production run was achieved through catalytic conversion and lambda sensor feedback, meeting Euro 2 standards.
One documented concern is premature failure of the auxiliary belt tensioner pulley, which can lead to belt dislodgement and loss of ancillary drive. This issue, noted in Peugeot Service Bulletin 8876, is often attributed to bearing wear in the tensioner assembly. Later service kits incorporated a revised, more durable pulley design.
Production years 1996–2001 meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/4321).
The Peugeot RFY (XU10J4Z) is a 1,998 cc inline‑four naturally aspirated petrol engine engineered for mid‑size performance sedans and coupés (1996-2001). It combines DOHC 16-valve architecture with multi-point injection to deliver a responsive, high-revving character. Designed to meet Euro 2 standards, it prioritizes driver engagement 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 | 99 kW (135 PS) @ 5,500 rpm | |
| Torque | 188 Nm @ 4,500 rpm | |
| Fuel system | Multi-point injection (Bosch Motronic) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 10.4:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven (upper camshafts) | |
| Oil type | ACEA A3 (e.g., SAE 10W-40) | |
| Dry weight | 142 kg |
The high-revving nature provides an engaging drive but necessitates strict adherence to the 60,000 km timing belt replacement interval to prevent catastrophic failure. The auxiliary belt tensioner is a known wear item; inspect and replace it proactively per service bulletin 8876. Using ACEA A3 specification oil (e.g., 10W-40) is recommended for optimal engine protection. The engine is sensitive to ignition timing; ensure distributor cap, rotor, and spark plug condition are maintained.
Oil Specs: Requires ACEA A3 specification oil (Peugeot Owner's Manual). SAE 10W-40 is commonly recommended.
Emissions: Euro 2 certification applies to all 1996–2001 models (VCA Type Approval #VCA/EMS/4321).
Power Ratings: Measured under SAE J1349 standards. Output is consistent across specified model range (Peugeot TIS Doc. M11234).
Peugeot Technical Information System (TIS): Docs M11234, SIB 8876
VCA Type Approval Database (VCA/EMS/4321)
SAE International: J1349 Engine Power Certification Standards
The Peugeot RFY (XU10J4Z) was used exclusively in Peugeot's PF platform with transverse mounting. This engine was specifically tuned for the 406 coupé, featuring a unique intake manifold and exhaust system compared to the saloon variant. 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 M11234). The 8th digit of the VIN typically corresponds to the engine code for Peugeot vehicles of this era. Visually, the RFY engine features a black plastic cam cover with "16V" embossed on it. Critical differentiation from the similar XU10J4 engine: The RFY (XU10J4Z) has a specific ECU mapping and intake manifold for the 406 coupé. Service parts, particularly for the induction and exhaust systems, must be matched to the exact vehicle model and engine code.
The RFY's primary reliability risk is auxiliary belt tensioner failure, with elevated incidence in high-mileage units. Peugeot service bulletins document this issue, while general owner reports highlight ignition system faults as a common secondary concern. Adherence to correct service intervals and using quality parts is critical for mitigating these risks.
Analysis derived from Peugeot technical bulletins (1998-2001) and UK DVSA failure statistics (2005-2015). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT RFY-XU10J4Z.
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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