Range Rover P400e Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK Range Rover P400e engine specialists. Compare prices on reconditioned, rebuilt and used engines to find the most reliable and cost-effective solution for your plug-in hybrid luxury SUV.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £4,200 to £6,500 [EM-QUOTE - using 204PT Ingenium petrol data as proxy]
Used from £1,500 · Reconditioned from £3,000 · Common codes: AJ20P4, 204PT
From £1,500
Tested, bare/short engine
From £3,000
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
Secure enquiry - no spam, no pressure. Genuine quotes only from vetted UK Range Rover P400e specialists.
3 Simple Steps3 Simple Stepsto Finding the Best Range Rover P400e Replacement Engineto Finding the Best Range Rover P400e Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryRange Rover P400e - Engine History & Specs at a Glance
When the P400e variant was introduced to the Range Rover lineup, it brought pioneering plug-in hybrid electric vehicle (PHEV) technology to the flagship luxury SUV, combining a refined 2.0-litre Ingenium petrol engine with an electric motor for seamless, low-emission performance.
Variant HistoryRange Rover P400e - Engine History & Specs at a Glance
When the P400e variant was introduced to the Range Rover lineup, it brought pioneering plug-in hybrid electric vehicle (PHEV) technology to the flagship luxury SUV, combining a refined 2.0-litre Ingenium petrol engine with an electric motor for seamless, low-emission performance.
Range Rover P400e
Fuel TypePetrol Plug-in Hybrid (PHEV)
Engine Size Range2.0L (1997cc)
Power Output Range~300 PS (petrol engine only) / ~404 PS (combined system output)Engine History Timeline
AJ20P4 (2.0L Petrol PHEV) ~404 PS combined, introduced in the L405 Range Rover facelift, featuring an 8-speed automatic transmission and an integrated electric motor with a 13.1 kWh battery.
Continued in the all-new L460 Range Rover generation featuring an upgraded battery capacity (up to 31.8 kWh) and refined Ingenium petrol architecture for extended electric-only range and improved efficiency.
Key Specs Snapshot
Fuel TypePetrol Plug-in Hybrid (PHEV)Engine Size Range2.0L (1997cc)Power Output Range~300 PS (petrol engine only) / ~404 PS (combined system output)Years Produced2018-presentEvery engine fitted to the Range Rover P400e is covered below, with UK rebuilt pricing and known failure points.
Range Rover P400e Engine Codes - Specifications & Replacement CostRange Rover P400e Engine Codes - Specifications & Replacement Cost
2.0L Petrol Plug-in Hybrid (2018-present)
Power Output~300 PS (petrol engine) / ~404 PS (combined)Years Fitted2018-present
Compatible Trim Levels
- Range Rover P400e SE
- Range Rover P400e HSE
- Range Rover P400e Autobiography
- Range Rover P400e First Edition (all include PHEV architecture)
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£1,500-£2,800
Reconditioned
Addressed known issues, tested
£3,000-£5,000
Rebuilt
Full teardown, upgraded internals
£4,200-£6,500
Common Failure
Cooling system issues, water pump failure, and occasional timing chain stretch are commonly reported, typically emerging between 60,000 and 120,000 miles.
The Range Rover P400e (AJ20P4) combines complex hybrid architecture with the 2.0L Ingenium petrol engine. While generally refined, it shares known weaknesses with the broader Ingenium petrol family. Rebuilt engines sourced through EnginesMarket include upgraded components addressing these original failure points, backed by a minimum 12-month unlimited-mileage warranty.
Why the Range Rover P400e AJ20P4 Suffers Thermal Stress
Affected Vehicles
Range Rover P400e (AJ20P4, 2018-present)
Typical Failure Mileage
60,000-120,000 miles
Root Cause
Plastic water pump impellers and thermostat housings can degrade over time, leading to coolant loss, overheating warnings, and potential cylinder head damage if ignored.
Why It Happens
Plastic water pump impellers and thermostat housings can degrade over time, leading to coolant loss, overheating warnings, and potential cylinder head damage if ignored.
Dealer (parts + labour)
£800-£1,500
Specialist (parts + labour)
£400-£800
What it involves
Replacing the water pump, thermostat, and flushing the cooling system with OEM-spec coolant.
Suitability
Viable preventative fix if caught before severe overheating occurs.
1 - 2 daysDealer (parts + labour)
£6,000-£9,000
Specialist (parts + labour)
£4,200-£6,500 [EM-QUOTE]
What it involves
Supply & fit, upgraded components addressing the original failure point, 12-month warranty.
Suitability
The right call if overheating has warped the cylinder head or caused catastrophic internal damage.
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Minor/Preventative Minor | £800-£1,500 | £400-£800 | Replacing the water pump, thermostat, and flushing the cooling system with OEM-spec coolant. | Viable preventative fix if caught before severe overheating occurs. | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £6,000-£9,000 | £4,200-£6,500 [EM-QUOTE] | Supply & fit, upgraded components addressing the original failure point, 12-month warranty. | The right call if overheating has warped the cylinder head or caused catastrophic internal damage. | 1 - 2 days |
Our Recommendation
Our Recommendation
For minor cooling leaks or early timing chain noise, targeted specialist repair is highly cost-effective. However, if the AJ20P4 has suffered catastrophic overheating, severe head warping, or timing chain jump, a full rebuilt engine with upgraded internals offers the best long-term reliability and protects your significant vehicle investment.
Don't Let Engine Failure Write Off Your Range Rover P400e
Don’t risk a costly cooling or timing chain failure ruining your premium Range Rover. By comparing quotes through EnginesMarket, you secure a rebuilt or reconditioned AJ20P4 engine with upgraded components that address known weak points, all backed by a comprehensive 12-month unlimited mileage warranty. Avoid main dealer premiums and benefit from nationwide supply and fit options tailored to your exact vehicle.
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
"All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific Range Rover P400e. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Range Rover P400e Engine ReplacementFrequently Asked Questions
Question 1How much does a Range Rover P400e engine replacement cost-
A rebuilt Range Rover P400e (AJ20P4) engine typically costs between £4,200 and £6,500 for supply only, while reconditioned units start from £3,000.
- Prices include full PHEV system compatibility and updated internal components.
- Rebuilt engines come with a 12-month unlimited mileage warranty.
Question 2What are the signs of AJ20P4 engine failure in a Range Rover P400e-
Owners often report a metallic rattling noise on cold starts (timing chain), unexplained coolant loss, or frequent “Engine Overheating” warning lights.
- A sweet smell from the engine bay or white smoke can indicate a failing water pump or head gasket.
- Sudden loss of power or hybrid system faults can point to secondary engine damage.
Question 3Is it worth replacing the engine in a 2018+ Range Rover P400e-
Yes-modern Range Rover P400e models retain very strong values, typically between £35,000 and £100,000+.
- A £4,200-£6,500 rebuilt engine investment protects a high-value asset and restores factory performance.
- Rebuilt AJ20P4 engines include engineering fixes not present in the original unit.
Question 4How long does a Range Rover P400e engine replacement take-
A standard supply and fit service for the Range Rover P400e typically takes 3 to 4 days.
- This includes full engine swap, PHEV system recalibration, and thorough road testing.
- Supply-only orders can be dispatched nationwide within 24-48 hours of quote acceptance.
Question 5Does the AJ20P4 engine replacement retain the plug-in hybrid (PHEV) functionality-
Yes-every rebuilt or reconditioned AJ20P4 engine supplied through EnginesMarket is fully compatible with the Range Rover’s PHEV architecture.
- The integrated electric motor, high-voltage battery, and associated wiring remain untouched during replacement.
- Calibration files are preserved or reloaded to ensure seamless hybrid operation and emissions compliance.
Why Choose UsCompare Range Rover P400eEngine PricesToday
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12-Month Warranty on every rebuilt Range Rover P400e engine
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