The Peugeot EP6 is a 1,598 cc, inline‑four turbocharged petrol engine produced between 2007 and 2015. It features dual overhead camshafts (DOHC), 16 valves, and direct fuel injection (GDI) with variable valve timing. In standard form it delivered 110–150 kW (150–204 PS) depending on tune, with torque ranging from 240 to 275 Nm, enabling brisk performance across compact and mid — size applications.
Fitted to models such as the Peugeot 308 (T7), 508 (ZMJ), RCZ, and co — devel…
Production years 2007–2010 meet Euro 5 standards; 2011–2015 models meet Euro 6 depending on variant (VCA UK Type Approval #VCA/EMS/7890).
The Peugeot EP6 is a 1,598 cc inline‑four turbocharged petrol engine engineered for compact and mid-size models (2007–2015). It combines gasoline direct injection with a single twin-scroll turbocharger to deliver strong mid-range torque and refined performance. Designed to meet Euro 5 (early) and Euro 6 (late) standards, it balances sporty response with emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,598 cc | |
Fuel type | Petrol (Unleaded, RON 95 min; RON 98 recommended for high-output variants) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 77.0 mm × 85.8 mm | |
Power output | 110–150 kW (150–204 PS) | |
Torque | 240–275 Nm @ 1,700–4,500 rpm | |
Fuel system | Bosch HDP5 high-pressure direct injection (up to 200 bar) | |
Emissions standard | Euro 5 (2007–2010); Euro 6 (2011–2015) | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single twin‑scroll turbo (Honeywell/Garrett) | |
Timing system | Chain (front‑mounted; maintenance‑free design) | |
Oil type | PSA B71 2290 (SAE 5W‑40) | |
Dry weight | 128 kg |
The Peugeot EP6 was used across PSA's T7/ZMJ platforms with transverse mounting and co-developed with BMW under the Prince engine program. This engine received platform-specific adaptations—reinforced mounts in the 508, unique intercooler routing in the RCZ, and revised ECU maps in MINI applications—and from 2011 the facelifted 308 adopted Euro 6 calibration with updated catalysts, creating software interchange limits. Partnerships allowed MINI Cooper S and BMW 116i/118i to share core architecture. All adaptations are documented in OEM technical bulletins.
The EP6's primary reliability risk is high-pressure fuel pump (HPFP) failure on pre-2012 builds, with elevated incidence in high-mileage or poorly maintained vehicles. PSA internal field data from 2013 indicated a measurable uptick in HPFP replacements before 100,000 km in southern European fleets, while UK DVSA records show no significant emissions-related MOT failures linked to this engine. Extended oil intervals and low-quality fuel increase cam follower stress, making oil specification and interval adherence critical.
Analysis derived from PSA technical bulletins (2007–2015) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
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The EP6 offers strong performance but requires diligent maintenance. Early engines (2007–2011) had HPFP and carbon buildup concerns, but post-2012 revisions improved fuel pump durability. With correct oil (PSA B71 2290), timely changes, and periodic intake cleaning, the engine can exceed 200,000 km. Its turbocharged design demands more attention than naturally aspirated units.
Main issues are HPFP failure (pre-2012), intake valve carbon fouling, turbo wastegate rattle, and ignition coil degradation. HPFP wear is the most serious mechanical concern; others are typical for direct-injection turbo engines. PSA issued Service Bulletin 9127B to address fuel pump reliability.
The EP6 powered the Peugeot 308 (T7, 2007–2015), 508 (ZMJ, 2010–2015), and RCZ (2010–2015) as the 1.6 THP 150/200. It was also used in Citroën DS4/DS5 and co-developed with BMW for MINI Cooper S and BMW 1 Series. No other Peugeot models used this specific 1.6L turbo GDI four-cylinder.
Yes. The EP6 responds well to ECU remapping. Stage 1 tunes typically yield +20–30 kW safely due to robust internals. Higher stages require upgraded intercooler, exhaust, and HPFP. Many owners achieve 180–190 kW reliably. However, aggressive tuning without supporting mods accelerates HPFP and turbo wear.
Good for a turbo petrol. In the Peugeot 508 1.6 THP 155, official combined consumption is 6.2 L/100km (45 mpg UK). Real-world mixed driving typically achieves 7.0–8.5 L/100km (33–40 mpg UK). Urban use may see 9.0 L/100km; highway cruising can drop to 5.5 L/100km. High-output variants consume more.
Yes. The EP6 is an interference design. If the timing chain were to fail (though rare due to its robust front-mounted chain), piston-to-valve contact would likely cause catastrophic internal damage. However, chain failures are extremely uncommon with proper oil maintenance.
PSA specifies SAE 5W-40 oil meeting PSA B71 2290 standard (equivalent to ACEA A3/B4). Always use a full-synthetic oil designed for turbocharged direct-injection engines. Change every 15,000 km or annually to protect the HPFP, turbo, and valve train.
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Regulation (EC) No 715/2007
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