The Peugeot 5FU (EP6CDTX) is a 1,598 cc, inline‑four turbo‑petrol engine produced between 2015 and 2021. It features a DOHC 16‑valve design with BMW‑sourced twin‑scroll turbocharging, direct fuel injection, and Valvetronic variable valve lift. Output is rated at 184 kW (250 PS), delivering peak torque of 330 Nm for exhilarating, high — revving performance.
Fitted exclusively to the high — performance 308 GTi 270 and 308 GTi by Peugeot Sport, the 5FU was engineered for tr…
Production years 2015–2021 meet Euro 6 standards (VCA UK Type Approval #VCA/EMS/8765).
The Peugeot 5FU (EP6CDTX) is a 1,598 cc inline‑four turbo‑petrol engineered for high-performance hatchbacks (2015-2021). It combines direct fuel injection with BMW-sourced Valvetronic and a twin‑scroll turbocharger to deliver exceptional, linear power and a high-revving character. Designed to meet Euro 6 standards, it balances extreme performance with modern emissions control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,598 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 77.0 mm × 85.8 mm | |
Power output | 184 kW (250 PS) | |
Torque | 330 Nm @ 1,900 rpm | |
Fuel system | Bosch HDEV6 direct injection (up to 350 bar) | |
Emissions standard | Euro 6 | |
Compression ratio | 9.2:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single twin‑scroll turbo (Mitsubishi Heavy Industries) | |
Timing system | Chain (front‑mounted) | |
Oil type | PSA B71 2312 (SAE 0W‑30) | |
Dry weight | 138 kg |
The Peugeot 5FU (EP6CDTX) was used exclusively on Peugeot's PF2 platform with transverse mounting. This engine received no platform-specific adaptations beyond the standard high-performance cooling and exhaust setup, and no significant facelift revisions occurred during its production run, ensuring full parts interchangeability. All specifications are documented in OEM technical bulletins.
The 5FU (EP6CDTX)'s primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles with modified ECU maps or aggressive driving. PSA internal reports indicated a notable failure rate before 60,000 km in early production batches, while owner feedback frequently cites sudden power loss. Extended periods of high-RPM operation and infrequent oil changes accelerate pump wear, making maintenance adherence critical.
Analysis derived from PSA technical bulletins (2017-2021) and owner-reported failure data (2018-2023). 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 5FU offers exceptional performance but has a known weakness with its high-pressure fuel pump, especially in early models. With meticulous maintenance, use of correct oil (PSA B71 2312), and premium RON 98 fuel, it can be reliable. Addressing the fuel pump proactively or ensuring it's the revised version is key to long-term ownership. Avoid aggressive ECU tunes without supporting modifications.
The most frequent issues are high-pressure fuel pump failure, timing chain tensioner wear, turbo wastegate actuator problems, and GPF clogging. These are well-documented in PSA service bulletins and owner forums. Fuel pump failure is the most critical, as it can lead to sudden breakdowns.
The ultra-high-performance 5FU (EP6CDTX) 1.6L turbo petrol engine was fitted exclusively to the Peugeot 308 GTi 270 and 308 GTi by Peugeot Sport from 2015 to 2021. It was the most powerful version of the Prince engine family ever produced by Peugeot.
Yes, the 5FU responds extremely well to ECU remapping. Stage 1 tunes can safely increase power to around 280-300 PS and torque to 380-400 Nm. Stage 2 with a downpipe and intercooler can reach 320+ PS. The engine is robust, but pushing beyond 350 PS requires internal upgrades and is not recommended for daily use due to reliability concerns.
Real-world fuel economy reflects its performance nature. In a Peugeot 308 GTi 270, expect around 9.5-11.0 L/100km (28-25 mpg UK) in mixed driving. Highway cruising can yield 7.0-7.5 L/100km (40-38 mpg UK). Aggressive driving will significantly increase consumption, and the GPF system can also impact efficiency during regeneration cycles.
Yes. The 5FU (EP6CDTX) is an interference engine. If the timing chain were to fail or jump due to tensioner issues, the pistons would collide with the open valves, causing catastrophic internal engine damage. This makes addressing any chain rattle immediately paramount.
Peugeot mandates the use of oil meeting the PSA B71 2312 specification, typically a 0W-30 synthetic. This low-SAPS (Sulphated Ash, Phosphorus, Sulphur) oil is critical for protecting the turbocharger, GPF, and catalytic converter from clogging and ensuring proper lubrication of the timing chain system.
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.
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