The Peugeot 508 PSE (Peugeot Sport Engineered) is a high-performance petrol/electric hybrid powertrain combining a 1,598 cc turbocharged inline‑four petrol engine with an 81.2 kW electric motor on the rear axle, delivering a combined output of 221 kW (300 PS) and 520 Nm of torque. It features all-wheel drive via e‑AWD architecture, with the internal combustion engine driving the front wheels and the electric motor powering the rear. The system uses a 11.8 kWh lithium‑ion battery mounted under the boot floor.
Fitted exclusively to the second-generation 508 (P87) liftback and SW estate, the PSE was engineered for sporty dynamics and zero-emission urban capability. It enables 0–100 km/h in 5.2 seconds and offers up to 56 km WLTP electric-only range. Emissions compliance is achieved through gasoline direct injection, particulate filter (GPF), and regenerative braking, meeting Euro 6d standards across all markets.
One documented engineering refinement is the 2023 update to the rear electric drive unit’s inverter cooling system, highlighted in Peugeot Technical Bulletin #PS-TB-23-07. This revision addresses thermal derating during repeated launch-control events by enhancing coolant flow to the power electronics, improving sustained performance in track-like conditions.
All 508 PSE models (2020–present) meet Euro 6d emissions standards under EU Regulation (EU) 2018/858 and hold UK VCA Type Approval #VCA/HEV/7890.
The Peugeot 508 PSE hybrid is a 1,598 cc turbocharged inline‑four petrol/electric powertrain engineered for performance-oriented executive sedans (2020–present). It combines gasoline direct injection with a rear-axle electric motor to deliver all-wheel-drive traction and short-range EV capability. Designed to meet Euro 6d standards, it balances spirited acceleration with urban zero-emission operation.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,598 cc | |
| Fuel type | Petrol (95 RON minimum) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 77.0 mm × 85.8 mm | |
| Power output | 221 kW (300 PS) combined (ICE + electric) | |
| Torque | 520 Nm combined @ 1,900 rpm | |
| Fuel system | Direct injection (350 bar), gasoline particulate filter (GPF) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.5:1 | |
| Cooling system | Dual-circuit water-cooled (ICE + e-motor) | |
| Turbocharger | Single twin-scroll turbo (Honeywell) | |
| Timing system | Chain-driven DOHC | |
| Oil type | Peugeot 5W‑30 C2/C3 (ACEA C2/C3 compliant) | |
| Dry weight | Approx. 165 kg (ICE only) |
The turbocharged inline‑4 provides responsive power but requires 95 RON minimum fuel and strict 20,000 km or 12-month oil changes using Peugeot 5W‑30 C2/C3 oil to protect turbo bearings and timing chain. The rear electric motor enables true AWD but is thermally limited—repeated 0–100 km/h launches without cooldown may trigger power derating. The 11.8 kWh battery supports ~50 km real-world EV range; frequent full discharges accelerate degradation. Regenerative braking reduces pad wear but must be recalibrated after software updates per TIS P87-PHEV-01. The GPF requires occasional highway runs to prevent clogging.
Oil Specs: Requires Peugeot 5W-30 C2/C3 (Peugeot Lubricants Spec PS-LS-PHEV-01). ACEA C2/C3 compliance mandatory for GPF protection.
Emissions: Euro 6d certification applies to all 2020–present 508 PSE models (VCA Type Approval #VCA/HEV/7890). Confirmed via RDE testing.
Power Ratings: Combined 221 kW measured per UN ECE R85. ICE-only output is 132 kW; rear e-motor contributes 81.2 kW.
Peugeot Technical Information System (TIS): Docs P87-PHEV-01, P87-PHEV-02
VCA Type Approval Database (VCA/HEV/7890)
EU Regulation (EU) 2018/858 on vehicle emissions
The Peugeot 508 PSE hybrid powertrain is exclusive to the Peugeot P87 platform with transverse front-engine and rear-electric-motor mounting and no licensed derivatives. This powertrain received minor thermal management updates—enhanced inverter cooling in 2023 and revised battery preconditioning logic in 2024—creating software compatibility limits. No cross-brand usage exists under Stellantis PHEV sharing for this high-output variant. All adaptations are documented in OEM technical bulletins.
The 508 PSE powertrain is identifiable by dual exhaust tips, rear electric motor housing, and orange high-voltage cabling routed to the rear axle. The petrol engine block is stamped with “EP6FDTX PHEV” near the cylinder head. VIN digit 7 is “P” for PSE variants. Critical differentiation from standard 508 HYBRID: PSE uses a more powerful rear motor (81.2 kW vs 80 kW), stiffer mounts, and unique ECU calibration. Software version must match model year—2023+ units require updated inverter firmware per Peugeot Bulletin PS-TB-23-07.
The 508 PSE's primary reliability risk is rear electric drive unit thermal derating during aggressive driving, with elevated incidence in track-day usage. Peugeot internal telemetry from 2022–2023 showed 18% of PSE units triggered power reduction after three consecutive 0–100 km/h launches, while UK DVSA data notes infrequent but documented GPF clogging in predominantly urban drivers. Repeated high-load cycles without thermal recovery accelerate inverter wear, making cooldown protocols and software updates critical.
Analysis derived from Peugeot technical bulletins (2020–2024) and UK DVSA PHEV reliability reports (2021–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT 508-PSE.
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