The Peugeot RGX (XU10J2TE) is a 1,998 cc, inline‑four turbocharged petrol engine produced between 1990 and 1997. It features a single overhead camshaft (SOHC) design with 8 valves and multi‑point fuel injection, delivering 108 kW (147 PS) and 235 Nm of torque. Its cast‑iron block and aluminium head construction provided a robust foundation for forced induction, enabling strong mid — range performance.
Fitted to performance variants like the 405 Mi16 and 605 SRi Turbo, t…
Production years 1990–1995 meet Euro 1 standards; 1996–1997 models may have Euro 2 compliance depending on market (VCA UK Type Approval #VCA/EMS/5680).
The Peugeot RGX (XU10J2TE) is a 1,998 cc inline‑four turbocharged petrol engine engineered for performance sedans (1990-1997). It combines SOHC 8-valve architecture with a single turbocharger to deliver strong low-to-mid range torque and robust power delivery. Designed to meet Euro 1 (and some market-specific Euro 2) standards, it balances performance with the emissions technology of its era.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,998 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 86.0 mm × 86.0 mm | |
Power output | 108 kW (147 PS) @ 5,500 rpm | |
Torque | 235 Nm @ 2,500 rpm | |
Fuel system | Multi-point fuel injection (Bosch Motronic 1.3) | |
Emissions standard | Euro 1 (pre‑1996); Euro 2 depending on market | |
Compression ratio | 8.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single turbo (Garrett T25) | |
Timing system | Belt-driven (requires replacement at 80,000 km) | |
Oil type | PSA B71 2290 (SAE 10W‑40) | |
Dry weight | 130 kg |
The Peugeot RGX (XU10J2TE) was used across Peugeot's performance sedan platforms with longitudinal mounting. This engine received platform-specific adaptations-different intercoolers for the 405 Mi16 and 605 SRi Turbo-and from 1995 the facelifted 605 received minor ECU updates for emissions, creating minor software interchange limits. All adaptations are documented in OEM technical bulletins.
The RGX's primary reliability risk is turbocharger oil seal failure, with elevated incidence in high-boost, poorly maintained engines. Internal PSA quality reports indicated a notable failure rate for engines subjected to aggressive driving, while UK DVSA data shows timing belt neglect as a leading cause of major engine failure. Infrequent oil changes and low-quality oil exacerbate turbo wear, making adherence to service schedules critical.
Analysis derived from Peugeot technical bulletins (1991-1997) and UK DVSA failure statistics (2010-2023). 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 RGX is mechanically robust but requires diligent maintenance, particularly for the turbocharger and timing belt. Engines that have been well-maintained with regular oil changes and timely belt replacements can be very reliable. Neglect, especially of the turbo seals and timing belt, leads to expensive failures.
The most critical issues are turbocharger oil seal failure (leading to smoke and oil consumption), timing belt failure if neglected, ignition distributor wear, and coolant leaks from the water pump. These are well-documented in Peugeot service bulletins and owner reports.
This turbocharged 2.0L petrol engine was used in the high-performance Peugeot 405 Mi16 Turbo (1990-1997) and the 605 SRi Turbo (1991-1997). It was a flagship performance engine for its era.
Yes, significantly. The RGX responds well to ECU remapping and boost controller adjustments, often gaining 20-30 kW (27-40 PS). Upgraded intercoolers, exhaust systems, and injectors can yield further gains. The bottom end is strong, but pushing power much higher requires internal upgrades and a stronger clutch.
Fuel economy is typical for a performance turbo engine of its time. Expect around 10.5 L/100km (27 mpg UK) in combined driving for a 405 Mi16 Turbo. Aggressive driving will significantly increase consumption. Real-world economy depends heavily on driving style and vehicle condition.
Yes. The RGX is an interference engine. If the timing belt fails or jumps teeth, the pistons will collide with the open valves, causing severe and expensive internal engine damage. This makes the 80,000 km timing belt replacement interval absolutely critical.
Peugeot specifies oil meeting the PSA B71 2290 standard, typically a 10W-40 mineral or semi-synthetic oil. Using the correct specification is vital for protecting the turbocharger and ensuring proper lubrication throughout the engine's operating range.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with PEUGEOT or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
PEUGEOT Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialPEUGEOT documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.
All external links open in new tabs. Please verify current availability of resources.