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 everyday drivability with strong low-end pulling power. Emissions compliance for its era was managed through a diesel particulate filter (DPF) and exhaust gas recirculation (EGR), allowing it to meet Euro 4 standards initially, with later variants achieving Euro 5 compliance.
A documented concern for this engine is premature failure of the high-pressure fuel injectors, which can lead to poor running or engine damage. This issue, highlighted in Peugeot Service Information Bulletin SIB 6914, is often linked to fuel contamination or the use of incorrect oil specifications affecting injector lubrication.
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 DOHC 16-valve design and fixed-geometry turbo provide strong low-end torque ideal for urban driving but demand strict adherence to 20,000 km oil change intervals using ACEA C3 oil to protect the DPF and high-pressure injectors. Fuel quality is critical; contamination can cause rapid injector failure as per Peugeot SIB 6914. The chain-driven timing system is generally robust but requires periodic inspection for tensioner wear. DPF regeneration cycles should not be interrupted to prevent system blockages.
Oil Specs: Requires ACEA C3 specification oil (Peugeot Owner's Manual). 5W-30 viscosity is standard for DPF compatibility.
Emissions: Euro 4 certification applies to 2006-2009 models; Euro 5 for 2010-2014 (VCA Type Approval #VCA/EMS/8764).
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across applications (Peugeot TIS Doc. DW10-001).
Peugeot Technical Information System (TIS): Docs DW10-001, DW10-002, DW10-003
VCA Type Approval Database (VCA/EMS/8764)
EEC Directive 80/1269/EEC - Engine Power Measurement
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.
Locate the engine code stamped on a flat pad on the cylinder block, typically near the gearbox flange or on the front timing cover (Peugeot TIS DW10-005). The code will read "DW10ATED4" or "RHT". Visually, it is identifiable by its aluminum block, DOHC head with "16V" casting, and the presence of a DPF in the exhaust system. Differentiate from the higher-powered DW10CTED4 (RHD) by its lower power output (140 PS vs 163 PS) and specific ECU mapping. Service parts are generally consistent across 308/407/508 applications, but ancillary brackets and mounts differ.
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.
Find answers to most commonly asked questions about PEUGEOT RHT-DW10ATED4.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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