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…
Production years 1994–2001 meet Euro 2 standards .
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 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.
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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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The LFZ is generally reliable with proper maintenance. Its main weakness is the plastic inlet manifold, which can fail and cause severe engine damage. Adhering strictly to the 60,000 km timing belt change and replacing the manifold with the updated part if needed are crucial. With these addressed, it's a robust and rewarding engine.
The most frequent issues are plastic inlet manifold failure causing coolant leaks (SIB 6031 G), timing belt failure if neglected, ignition coil pack failure leading to misfires, and throttle body carbon buildup causing idle problems. These are well-documented in Peugeot service bulletins and owner forums.
The LFZ (XU7JP) engine was primarily fitted to the sporty variants of the Peugeot 306 (S16, Rallye from 1994-2001) and the Peugeot 405 (Mi16 Phase 2 from 1994-1997). It was the 16-valve 1.8L petrol engine for these performance models, known for its rev-happy nature.
Yes, it is a popular tuning engine. Common upgrades include a performance exhaust, induction kit, and ECU remap, yielding 10-20 kW. More extensive builds with head work, cams, and throttle bodies can exceed 140 kW. Its strong bottom end and free-revving nature make it very receptive to modifications.
Moderate for its performance. In a Peugeot 306 S16, expect real-world figures of around 8.5 L/100km (33 mpg UK) in mixed driving and 7.0 L/100km (40 mpg UK) on the highway. Fuel economy is heavily dependent on driving style due to its sporty nature.
Yes. The LFZ is an interference engine. If the timing belt breaks or slips, the pistons will collide with the open valves, causing severe and expensive damage to the cylinder head. This makes the 60,000 km timing belt replacement interval absolutely critical.
Peugeot originally specified API SJ/SL grade oil, typically a 10W-40 semi-synthetic oil. A modern equivalent is an ACEA A3/B4 10W-40 semi-synthetic oil. Using a quality petrol engine oil is essential for protecting the engine's internals and maintaining performance.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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.
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