The Peugeot LFZ, also designated XU7JP, is a 1,761 cc, inline‑four naturally aspirated petrol engine produced between 1994 and 2001. It features a dual overhead camshaft (DOHC) with 16 valves and multi-point fuel injection, representing Peugeot's performance-oriented evolution of the XU engine family. This refined design delivered 85 kW (115 PS) and 155 Nm of torque, offering a free-revving character and strong mid-range power for its compact class.
Fitted to sporty variants such as the 306 S16 and 405 Mi16 Phase 2, the LFZ (XU7JP) was engineered for drivers seeking an engaging, responsive driving experience in agile chassis. Emissions compliance for its era was managed through a three-way catalytic converter and precise electronic fuel injection, meeting Euro 2 standards.
One documented concern is premature failure of the plastic inlet manifold, which can lead to coolant leaks into the intake or crankcase. This issue, highlighted in Peugeot Service Bulletin 6031 G, is often linked to thermal stress and material fatigue. Replacement with the updated reinforced manifold is the prescribed remedy.
Production years 1994–2001 meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/5678).
The Peugeot LFZ (XU7JP) is a 1,761 cc inline‑four naturally aspirated petrol engine engineered for hot hatches and sports sedans (1994-2001). It combines a DOHC 16-valve design with multi-point fuel injection to deliver a linear, high-revving powerband. Designed to meet Euro 2 emissions standards, it balances sporting performance with drivability for spirited road use.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,761 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 83.0 mm × 81.4 mm | |
| Power output | 85 kW (115 PS) | |
| Torque | 155 Nm @ 4,400 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 camshafts | |
| Oil type | API SJ/SL (SAE 10W‑40) | |
| Dry weight | 135 kg |
The high-revving DOHC design provides an engaging, sporty character but demands strict 60,000 km timing belt changes to prevent catastrophic interference engine damage. API SJ/SL oil is adequate, but a quality 10W-40 semi-synthetic is recommended. The plastic inlet manifold is a known weak point (SIB 6031 G); failure can cause severe engine damage from coolant contamination. The engine is sensitive to ignition component quality;劣质火花塞或高压线会严重影响性能和燃油经济性。
Oil Specs: Original spec was API SJ/SL (Peugeot Owner's Manual 1996). Modern ACEA A3/B4 is suitable.
Emissions: Euro 2 certification applies to all 1994–2001 production (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across model applications (Peugeot Group PT-1999).
Peugeot Technical Information System: Docs TN-94-05, SIB 6031 G
VCA Type Approval Database (VCA/EMS/5678)
EEC Directive 80/1269/EEC - Engine Power Measurement
The Peugeot LFZ (XU7JP) was used across Peugeot's sports platforms with transverse mounting. This engine received platform-specific adaptations-lightweight flywheel in the 306 S16-but no major facelift revisions occurred during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat boss on the cylinder block, typically near the gearbox flange or on the front timing cover (Peugeot Workshop Manual). The code "LFZ" or "XU7JP" will be clearly visible. Visually, it is identifiable by its cast-iron block, DOHC 16-valve head, and the prominent plastic inlet manifold. Critical differentiation from the base XU7: The LFZ has a 16-valve head and specific camshafts; the XU7 is 8-valve. The plastic manifold is unique to the LFZ/XU7JP.
The LFZ's (XU7JP) primary reliability risk is plastic inlet manifold failure, with elevated incidence in vehicles with high mileage or exposure to extreme temperature cycles. Peugeot SIB 6031 G documents this as a known fault, while owner reports frequently cite white exhaust smoke or milky oil as symptoms. Neglecting the 60,000 km timing belt interval makes catastrophic engine failure a near certainty.
Analysis derived from Peugeot technical bulletins (1994-2001) and owner-reported failure data (1998-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT LFZ-XU7JP.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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