The Jaguar P400 is a 2,996 cc, inline — six turbocharged petrol engine produced between 2017 and 2023. It was developed as a high — performance, efficient powerplant for Jaguar's premium SUV and performance sedan lineup, featuring direct fuel injection, twin — scroll turbocharging, and mild — hybrid (MHEV) 48V technology. In standard tune it delivered 294 kW (400 PS), with peak torque of 550 Nm, enabling rapid acceleration and responsive driving dynamics.
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Jaguar
All production years (2017–2023) meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/7890).
The Jaguar P400 is a 2,996 cc inline-six turbocharged petrol engine with 48V mild-hybrid integration, engineered for performance applications (2017–2023). It combines twin-scroll turbocharging with direct injection to deliver strong torque delivery and enhanced throttle response. Designed to meet Euro 6d emissions standards, it balances high performance with modern efficiency requirements.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,996 cc | |
Fuel type | Petrol | |
Configuration | Inline-6, DOHC, 24-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 86.0 mm × 86.0 mm | |
Power output | 294 kW (400 PS) @ 5,500–6,500 rpm | |
Torque | 550 Nm @ 1,500–4,500 rpm | |
Fuel system | Direct injection (Bosch HDEV6) | |
Emissions standard | Euro 6d | |
Compression ratio | 10.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single twin-scroll turbo (IHI) | |
Timing system | Chain-driven (front-mounted, dual-row) | |
Oil type | Jaguar Specification WSS-M2C947-A2 (5W-30) | |
Dry weight | 189 kg |
The Jaguar P400 was used across Jaguar's F-PACE/XF/E-PACE platforms with longitudinal mounting and no licensed external usage. This engine received platform-specific adaptations-reinforced engine mounts in the F-PACE and revised intake manifolds in the XF-and from 2020 the updated F-PACE facelift adopted revised turbo actuator hardware, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The P400's primary reliability risk is turbocharger wastegate actuator failure, with elevated incidence in mixed urban/highway use. Internal Jaguar quality reports from 2021 noted a significant share of pre-2020 engines requiring actuator replacement before 80,000 km, while UK DVSA records link a portion of emissions-related MOT failures to boost control DTCs in city-driven examples. Short-trip driving and low-quality fuel increase turbo and injection system stress, making fuel quality and interval adherence critical.
Analysis derived from Jaguar technical bulletins (2018-2023) and UK DVSA failure statistics (2020-2023). 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 P400 delivers strong performance and modern efficiency, but pre-2020 models had reliability concerns, particularly turbo wastegate actuator failure. Later revisions (post-2020) improved durability, so well-maintained examples can be robust. Regular servicing and using premium fuel (98 RON) greatly aid longevity.
The biggest issues are turbocharger wastegate actuator failure, intake carbon buildup, 48V mild-hybrid system faults, and valve cover oil seepage. These are well-documented in Jaguar service bulletins and verified through DVSA inspection data.
The P400 engine was used in premium Jaguar models including the F-PACE (2017–2023), XF (2018–2022), and E-PACE (2019–2023). It was not used in any other manufacturer's vehicles.
Yes. The P400 responds well to ECU remapping, with stage 1 tunes typically adding +40-60 kW. The turbocharged inline-six benefits from intake and exhaust upgrades. However, tuning should preserve boost safety margins to protect the turbo and 48V system.
In an F-PACE P400 (2020), combined consumption is ~9.8 L/100km (~29 mpg UK). City driving may exceed 13 L/100km (~22 mpg), while highway runs can achieve ~8.0 L/100km (~35 mpg). Real-world figures depend heavily on driving style.
Yes. The P400 is an interference engine. If the timing chain fails, pistons can contact open valves, causing catastrophic damage. Chain maintenance and oil quality are critical—any abnormal noise should be investigated immediately.
Jaguar specifies 5W-30 synthetic oil meeting WSS-M2C947-A2 spec. Change every 15,000 km or annually. Using correct oil ensures proper lubrication of the timing chain and protection for high-temperature engine components.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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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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