The Peugeot RHT (DW10ATED4) is a 1,997 cc, inline‑four turbo‑diesel engine produced between 2006 and 2014. It features an aluminum block with cast — iron liners, a double overhead camshaft (DOHC) 16 — valve head, and a high — pressure common — rail fuel system. This engine delivered 103 kW (140 PS) and 320 Nm of torque, offering a refined blend of efficiency and adequate performance for its class.
Fitted to popular models such as the 308, 407, and 508, the RHT was engineered for e…
Production years 2006–2009 meet Euro 4 standards; 2010–2014 models meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/8764).
The Peugeot RHT (DW10ATED4) is a 1,997 cc inline‑four turbo‑diesel engineered for compact and mid‑size models (2006-2014). It combines a DOHC 16-valve head with a high-pressure common-rail injection system to deliver strong low‑end torque and efficient cruising. Designed to meet Euro 4 (and some market‑specific Euro 5) standards, it balances everyday performance with economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,997 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 85.0 mm × 88.0 mm | |
Power output | 103 kW (140 PS) | |
Torque | 320 Nm @ 2,000 rpm | |
Fuel system | Bosch CP3.4 high-pressure common-rail (up to 1,600 bar) | |
Emissions standard | Euro 4 (pre‑2010); Euro 5 depending on market | |
Compression ratio | 16.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Fixed-geometry turbocharger | |
Timing system | Chain-driven | |
Oil type | ACEA C3 (e.g., SAE 5W‑30) | |
Dry weight | 175 kg |
The Peugeot RHT (DW10ATED4) was used across Peugeot's 308/407 platforms with transverse mounting. This engine received minor platform-specific adaptations-different engine mounts and ancillary layouts between the 308 and 407-but no major facelift revisions affecting core compatibility during its production run. All adaptations are documented in OEM technical bulletins.
The RHT's primary reliability risk is high-pressure fuel injector failure, often linked to fuel quality or incorrect oil usage. Peugeot SIB 6914 documents this issue, while UK DVSA data shows a correlation between neglected maintenance and DPF-related MOT failures. Adherence to strict fuel and oil specifications is critical for long-term reliability.
Analysis derived from Peugeot technical bulletins (2006-2014) and UK DVSA failure statistics (2010-2020). 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 RHT can be reliable with meticulous maintenance. Its main vulnerabilities are the high-pressure fuel injectors and DPF system. Using only ultra-low sulfur diesel and ACEA C3 oil, adhering to strict 20,000 km service intervals, and ensuring regular highway driving for DPF regeneration are essential for longevity.
The most critical issues are premature failure of the high-pressure fuel injectors and DPF blockage. Other common problems include EGR valve clogging and turbocharger wastegate actuator failure. These are well-documented in Peugeot service literature, particularly SIB 6914 for injectors.
This 2.0L turbo-diesel was used in the Peugeot 308 (2007-2014), 407 (2006-2010), and 508 (2010-2014) models. It was typically found in mid-to-high trim variants like the Allure HDi and GT HDi, providing a balance of efficiency and adequate power.
Yes, the RHT has moderate tuning potential. A simple ECU remap can safely increase power by 15-25 kW and torque by 40-60 Nm. More extensive modifications are possible but increase stress on the turbo and injectors. Tuning should only be performed by specialists familiar with the Bosch EDC16C34 ECU.
Excellent for its class. Expect around 5.5-6.5 L/100km (51-43 mpg UK) in mixed driving for a 308, and potentially under 5.0 L/100km (56+ mpg UK) on steady highway runs. Its efficiency is a key strength, provided the DPF system is functioning correctly.
Yes. If the timing chain fails or jumps, the pistons will collide with the valves, causing severe internal engine damage. While the chain is generally robust, any unusual noise from the timing cover should be investigated immediately.
A high-quality 5W-30 synthetic oil meeting ACEA C3 specifications is mandatory. This low-SAPS (Sulphated Ash, Phosphorus, Sulphur) oil is essential for protecting the DPF from clogging and ensuring proper lubrication of the high-pressure fuel system components.
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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