The Citroen RHH (DW10CTED4) is a 1,997 cc, inline — four turbocharged diesel engine produced between 2008 and 2016. It features a DOHC 16 — valve configuration with common rail direct injection and a variable geometry turbocharger (VGT), delivering 103 kW (140 PS) at 4,000 rpm and 340 Nm of torque at 1,750 rpm. Part of the PSA DW10 engine family, the DW10CTED4 was engineered for strong mid — range performance and fuel efficiency in mid — size and commercial platforms.
Fitted to…
Production years 2008–2016 meet Euro 5 standards with SCR/AdBlue system .
The Citroen RHH (DW10CTED4) is a 1,997 cc inline-four turbocharged diesel engine engineered for mid-size and executive platforms (2008–2016). It combines common rail direct injection with a variable geometry turbocharger and SCR-based aftertreatment to deliver strong torque and emissions compliance. Designed to meet Euro 5 standards, it balances performance, refinement, and environmental requirements.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,997 cc | |
Fuel type | Diesel (ULSD, EN 590 compliant) | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (variable geometry) | |
Bore × stroke | 85.0 mm × 88.0 mm | |
Power output | 103 kW (140 PS) @ 4,000 rpm | |
Torque | 340 Nm @ 1,750–2,500 rpm | |
Fuel system | Delphi DCR common rail (up to 1,800 bar) | |
Emissions standard | Euro 5 (with SCR/AdBlue) | |
Compression ratio | 16.4:1 | |
Cooling system | Water-cooled | |
Turbocharger | Honeywell variable geometry turbo (VGT) | |
Timing system | Timing belt (renew every 120,000 km or 6 years) | |
Oil type | Total Rubia TIR 5000 5W-30 | |
Dry weight | 162 kg |
The Citroen RHH (DW10CTED4) was used across Citroen's Platform 3 and Platform 4 with transverse mounting and shared extensively with Peugeot under PSA Group harmonisation. This engine received platform-specific adaptations-reinforced engine mounts in the C6 and revised ECU mapping in the Peugeot 508-and from 2011 the updated DW10B variant introduced improved fuel pump durability, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Engine Finders UK Ltd, which operates EngineCode.uk, can pass your enquiry to engine suppliers in the UK. The service is for vehicles in the United Kingdom, with UK delivery or fitting. This is a commercially connected service, and sending an enquiry does not confirm diagnosis or compatibility.
Diagnostic reminder: If a technician has recommended replacing the engine, you can send an enquiry to engine suppliers in the UK. Confirm the diagnosis first: an engine-code record does not diagnose a fault.
Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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 DW10CTED4 is generally reliable when properly maintained, but early models (2008–2010) had high-pressure fuel pump concerns. Later revisions (post-2011) improved pump durability, so well-maintained examples can exceed 180,000 km. Regular fuel filter changes, timely timing belt replacement, and AdBlue system maintenance are essential for longevity.
The main issues are high-pressure fuel pump failure (especially pre-2011), timing belt failure due to age, EGR/DPF clogging from short trips, and AdBlue/SCR system faults. Other common complaints include turbo actuator sticking and occasional oil leaks. These are documented in PSA service bulletins and technical reports.
This 2.0L diesel engine was used in mid-size and executive Citroen models. It powered the C5 (2008–2016) and C6 (2008–2012). The engine was also shared with Peugeot (407, 508) across the same production window. All variants meet Euro 5 standards with SCR/AdBlue technology.
Aftermarket ECU tuning is common on the RHH-DW10CTED4 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Excellent for its class. In a C5 or 508 (140 PS version), typical consumption is ~6.8 L/100km (city) and ~4.6 L/100km (highway), or about 49 mpg UK combined. Real-world figures depend on driving style. Expect 45–50 mpg (UK) on mixed roads for a healthy DW10CTED4.
Yes. The DW10CTED4 is an interference engine. If the timing belt fails, pistons can strike open valves, causing severe internal damage. That's why belt replacement every 120,000 km or 6 years is critical—any sign of belt wear or tensioner noise should be addressed immediately.
PSA specifies Total Rubia TIR 5000 5W-30 synthetic oil. Use a high-quality oil suitable for modern diesel engines and change it every 15,000 km (or annually) to protect the EGR, DPF, SCR, and fuel system from wear and deposits.
Comprehensive technical documentation and regulatory references
EngineCode.uk is operated by Engine Finders UK Ltd. It provides engine-reference information and an optional commercial enquiry service. It is not an official manufacturer website. Check the record's sources and confirm vehicle-specific details before relying on it for parts, repairs or replacement.
Our editorial standard prioritises relevant manufacturer documentation and official regulatory sources. The sources and verification status for a record should be checked alongside the data.
A statement is not verified merely because a source is listed. Where supporting evidence is missing or conflicting, the record should identify that limitation. Please report unsupported or inconsistent information.
Transparency in gaps
A missing or unverified value does not mean the manufacturer has withheld it. We distinguish information not yet verified, information not available to us, and information explicitly not disclosed by the source.
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.
Records are subject to review and correction. Source links, dates and verification notes should be read with the technical information. Our Editorial and Sourcing Policy explains our standards and review process.
Found an error or missing source? Report a problem with this page. Include the field or statement concerned and a supporting source if available. You can also email corrections@enginecode.uk.
Copyright and permissions
Images and other material may be protected by copyright. Attribution does not by itself grant permission to reuse material. If you believe material on this site infringes your rights, contact copyrights@enginecode.uk with the page URL and details of your claim. We will review the material and take appropriate action.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
Our Privacy Policy explains how Engine Finders UK Ltd uses information from visits, vehicle lookups, enquiries and messages. Our Cookie Policy explains cookies and similar technologies and how to change your choices.
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.
Ownership and commercial services
EngineCode.uk is owned and operated by Engine Finders UK Ltd. Alongside our reference content, we offer an optional replacement-engine enquiry service through Engine Finders and may identify relevant services provided by businesses connected with us. These commercial connections are disclosed. Using an enquiry service is not required to read our reference content.
Engine Finders UK Ltd operates this website. Our optional enquiry service has a commercial purpose. Our Ownership and Commercial Disclosure explains the relationship between the reference website and that service. Participating suppliers pay a fee or subscription to participate on the network and receive quote requests.
Use this record as a starting point for identification. Specifications and vehicle applications may contain errors or omissions. Confirm the exact engine variant and compatibility using vehicle-specific documentation and a qualified supplier or technician.
All external links open in new tabs. Please verify current availability of resources.