The Peugeot 8HT (DV4TD) is a 1,398 cc, inline‑four turbo‑diesel engine produced between 2004 and 2010. It features a SOHC 8‑valve design with common rail direct injection and a fixed‑geometry turbocharger. In standard applications, it delivers 50 kW (68 PS), engineered for entry — level efficiency and urban drivability.
Fitted primarily to the Peugeot 207, 206+, and Citroën C3, the 8HT was designed for low — cost ownership and nimble city driving. Emissions compliance f…
Production years 2004–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/6789).
The Peugeot 8HT (DV4TD) is a 1,398 cc inline‑four turbo‑diesel engineered for compact city cars (2004-2010). It combines common‑rail direct injection with a fixed‑geometry turbocharger to deliver adequate low‑end torque for urban environments. Designed to meet Euro 4 standards, it prioritizes fuel economy and low-cost maintenance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,398 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 73.7 mm × 82.0 mm | |
Power output | 50 kW (68 PS) | |
Torque | 160 Nm @ 1,750 rpm | |
Fuel system | Siemens VDO common‑rail (up to 1,350 bar) | |
Emissions standard | Euro 4 | |
Compression ratio | 17.6:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Fixed‑geometry turbo (Garrett) | |
Timing system | Belt (front‑mounted) | |
Oil type | PSA B71 2290 (SAE 5W‑40) | |
Dry weight | 115 kg |
The Peugeot 8HT (DV4TD) was used across PSA Group's PF1 platform with transverse mounting. This engine received platform-specific adaptations-revised engine mounts for the 207 and specific exhaust routing for the C3-creating minor interchange considerations. All adaptations are documented in OEM technical bulletins.
The 8HT's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using poor-quality fuel. Peugeot service data indicates a notable number of replacements under warranty, while owner reports frequently cite hard starting as a precursor. Extended service intervals and contaminated fuel make adherence to the correct oil specification and fuel quality critical.
Analysis derived from Peugeot technical bulletins (2007-2011) and UK DVSA failure statistics (2012-2023). 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 8HT is generally reliable for long-term use if maintained correctly. Its main weaknesses are the high-pressure fuel pump and the timing belt, which must be replaced on schedule. The 8-valve design is simple and robust. Using the correct 5W-40 oil and high-quality diesel is essential for maximizing longevity and avoiding costly repairs.
The most frequent issues are high-pressure fuel pump failures causing hard starting, timing belt failure if not replaced on time, and EGR valve clogging leading to rough running. Glow plug failures are also common in colder climates. These are covered in Peugeot service documentation.
The 8HT (DV4TD) 1.4 HDi 70 engine was used in the Peugeot 206+ and 207 from 2006 to 2010. It was also fitted to the equivalent Citroën C3 during the same period. It was not used in larger PSA vehicles like the 308 or 407.
While not a common tuning candidate due to its 8-valve design and modest output, mild ECU remaps can safely increase power to around 80-85 PS. The stock internals can handle these gains. More aggressive tuning is not recommended due to the engine's design limitations. It’s best suited as a reliable, economical city car engine.
Real-world fuel economy is excellent for a small diesel. In a Peugeot 207, expect around 5.0 L/100km (56 mpg UK) in combined driving. Highway cruising can yield 4.0-4.5 L/100km (63-71 mpg UK), while city driving may be 6.0-6.5 L/100km (43-47 mpg UK). Results vary with driving style and vehicle condition.
Yes. The 8HT is an interference engine. If the timing belt were to fail or jump, the pistons would collide with the open valves, causing catastrophic internal damage. This is why replacing the belt, tensioner, and idlers at the 20,000 km interval is absolutely critical.
Peugeot mandates oil meeting the PSA B71 2290 specification, typically a 5W-40 synthetic. Using the correct oil is vital for protecting the high-pressure fuel pump and ensuring proper lubrication of the timing belt tensioner. Always change the oil and filter at the recommended 20,000 km intervals.
Comprehensive technical documentation and regulatory references
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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
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Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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GOV.UK: Vehicle Approval
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