The Peugeot RHA (DW10CTED4) is a 1,997 cc, inline‑four turbo‑diesel engine produced between 2010 and 2018. It features a cast iron block, aluminium cylinder head, and a dual overhead camshaft (DOHC) 16 — valve layout with a variable geometry turbocharger. Output ranges from 110 kW (150 PS) to 120 kW (163 PS), with torque figures of 340–370 Nm, providing strong low — end pull for its applications.
Fitted to models such as the 308, 508, and 3008, the RHA was engineered for refine…
Production years 2010–2018 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/2345).
The Peugeot RHA (DW10CTED4) is a 1,997 cc inline‑four turbo‑diesel engineered for mid-size hatchbacks and SUVs (2010-2018). It combines a high-pressure common rail fuel system with a variable geometry turbocharger to deliver strong low-rpm torque and efficient cruising. Designed to meet Euro 5 standards, it balances performance with emissions compliance.
| 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 | 110–120 kW (150–163 PS) | |
Torque | 340–370 Nm @ 2,000 rpm | |
Fuel system | High-pressure common rail (Bosch CP4.2, up to 1,800 bar) | |
Emissions standard | Euro 5 | |
Compression ratio | 16.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Variable geometry turbo (VGT) | |
Timing system | Chain-driven | |
Oil type | PSA B71 2290 (SAE 5W‑30) | |
Dry weight | 145 kg |
The Peugeot RHA (DW10CTED4) was used across Peugeot's mid-size platforms with transverse mounting. This engine received minor ECU and accessory drive adaptations between the 308 and 508 applications. All adaptations are documented in OEM technical bulletins.
The RHA's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using poor-quality fuel or exceeding service intervals. PSA internal service data indicates this was a notable concern for units with inconsistent maintenance, while DPF clogging remains a critical, preventable risk for urban-driven vehicles. Neglecting fuel quality or service schedules makes catastrophic engine damage highly probable.
Analysis derived from PSA technical bulletins (2010-2018) and UK DVSA failure statistics (2015-2023). 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 RHA can be reliable long-term with meticulous maintenance. The critical factors are using high-quality diesel and adhering to 20,000 km service intervals to protect the fuel pump and DPF. With proper care, these engines can exceed 200,000 km without major issues. Neglecting either fuel quality or service can lead to very expensive repairs.
The top issues are high-pressure fuel pump failure (due to fuel quality/service neglect), DPF clogging (from short trips), EGR valve carbon buildup, and turbo actuator failure. These are well-documented in PSA service information and owner reports. The timing chain is generally robust.
The RHA was primarily used in the Peugeot 308 II (1.6 BlueHDi), the later Phase 2 Peugeot 508 I (2.0 HDi), and the first-generation Peugeot 3008 (2.0 HDi). It was also fitted to the Citroën C5 II. It's the 150-163 PS high-output variant of the DW10 engine family.
Yes, it has good tuning potential. A simple ECU remap can safely yield 20-30 kW gains. More extensive modifications like a hybrid turbo or upgraded intercooler can push power towards 180-200 kW. The bottom end is robust, but the clutch and fuel system may need upgrading for significant power increases.
Real-world fuel economy is excellent for its power. Expect around 5.5-6.5 L/100km (43-51 mpg UK) in mixed driving for a 308. Highway cruising can see figures closer to 4.5 L/100km (63 mpg UK). Economy suffers significantly if the DPF is clogged or the engine is misfiring.
Yes, absolutely. The RHA is an interference engine. If the timing chain were to fail (though rare), the pistons would collide with the open valves, causing severe internal damage. Fortunately, the chain is designed to last the engine's lifetime with proper oil maintenance.
Peugeot mandates oil meeting the PSA B71 2290 specification, typically a 5W-30 low-SAPS (C2/C3) synthetic oil. Using the correct oil is vital for protecting the DPF and ensuring the longevity of the timing chain and fuel system. ACEA C2 or C3 rated oils are suitable equivalents.
Comprehensive technical documentation and regulatory references
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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.
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