The Land Rover 406PN Petrol is a 3,993 cc, V8 gasoline engine produced between 2021 and 2025. It features twin-turbocharging, direct fuel injection, and mild-hybrid electrification (MHEV) with a 48V integrated starter-generator (ISG). In standard tune, it delivers 530 kW (723 PS) and 750 Nm of torque, providing exceptional power delivery and refined performance.
Fitted to the Range Rover and Range Rover Sport SV models, the 406PN Petrol was engineered for ultimate performance and luxury. Emissions compliance was achieved through gasoline particulate filter (GPF), intelligent thermal management, and 48V energy recovery, allowing it to meet Euro 6d emissions standards. Designed for drivers seeking maximum power and dynamic capability, this engine represents the pinnacle of Land Rover’s performance engineering.
One documented concern is premature high-pressure fuel pump (HPFP) wear, particularly in early 2021–2022 production models. This issue, referenced in Land Rover Technical Service Bulletin RT/TC/21/08, is linked to contamination or inadequate lubrication in the fuel rail. Later revisions included updated pump materials and revised fuel system diagnostics to improve longevity and reduce misfire incidents.
All 406PN Petrol models (2021–2025) comply with Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/9123).
The Land Rover 406PN Petrol is a 3,993 cc V8 gasoline engine developed for high-performance luxury SUV applications (2021–2025). It combines twin-turbocharged direct injection with 48V mild-hybrid technology and variable valve timing to deliver responsive performance and improved emissions control. Engineered to meet Euro 6d standards, it balances track-capable power with on-road refinement.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,993 cc | |
| Fuel type | Petrol (Unleaded, 95 RON minimum) | |
| Configuration | V8, DOHC, 32-valve | |
| Aspiration | Twin-turbocharged | |
| Bore × stroke | 88.0 mm × 82.0 mm | |
| Power output | 530 kW (723 PS) @ 6,000 rpm | |
| Torque | 750 Nm @ 2,500–5,000 rpm | |
| Fuel system | Bosch HDEV7 direct injection (up to 350 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water-cooled, dual-circuit electric thermostat control | |
| Turbocharger | Dual BorgWarner EFR turbochargers with electronic wastegates | |
| Timing system | Chain-driven (multi-stage tensioner) | |
| Oil type | LR032278 (SAE 5W-30, API SN/CF) | |
| Dry weight | 225 kg |
The twin-turbocharged V8 design provides exceptional power ideal for high-speed driving and track use but requires adherence to 12,000 km oil change intervals using LR032278-specified 5W-30 oil to prevent premature timing chain and turbo wear. The integrated 48V mild-hybrid system demands proper battery health and regeneration cycle completion to maintain performance. Early models (2021–2022) showed elevated HPFP failure rates under aggressive driving; updated pumps from 2023 onward improved durability. The engine's longitudinal mounting aids weight distribution in full-size performance SUV platforms. Regular fuel system maintenance and use of premium-grade petrol (98 RON) are recommended to maximize injector and pump longevity.
Oil Specs: Requires LR032278 (5W-30) specification (Land Rover SIB RT/TC/21/08). Meets ACEA A1/B1 and API SN standards.
Emissions: All 406PN Petrol models meet Euro 6d standards (VCA Type Approval #VCA/EMS/9123), effective across all markets from 2021–2025.
Power Ratings: Measured under SAE J1349. Output assumes premium unleaded fuel (98 RON) and clean air induction (Land Rover TIS Doc. LR-E406PN-007).
Land Rover Technical Information System (TIS): Docs LR-E406PN-001, LR-E406PN-003, RT/TC/21/08
VCA Type Approval Database (VCA/EMS/9123)
SAE International: J1349 Engine Power Certification Standards
The Land Rover 406PN Petrol was used exclusively in Land Rover's Range Rover and Range Rover Sport SV models with longitudinal mounting and bespoke performance calibration. This engine received platform-specific adaptations-tuned intake manifolds in the Sport SV and revised cooling routing in the Range Rover SV-and from 2023 the facelifted Range Rover L460 models adopted updated ECU calibrations for improved throttle response, creating interchange limits. No licensing partnerships exist for this high-performance variant. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the right-side cylinder block near the starter motor (Land Rover TIS LR-E406PN-009). The 8th VIN digit indicates engine type ('H' for 4.0H Petrol). Pre-2023 models have gloss black valve covers with red accents; post-2023 units use carbon-fibre trim. Critical differentiation from standard V8s: 406PN Petrol has twin BorgWarner EFR turbochargers and a 48V ISG system. Service parts require model-year verification—turbo actuators for pre-2023 Sport SVR are not compatible with Range Rover SV due to ECU signal differences (Land Rover SIB RT/TC/21/08).
The 406PN Petrol's primary reliability risk is high-pressure fuel pump degradation, with elevated incidence in early production units. Internal Land Rover field reports from 2023 indicated a significant number of pre-2023 engines requiring HPFP replacement before 80,000 km, while UK DVSA MOT records show increased misfire-related failures in stop-start traffic. Aggressive driving and low-quality fuel exacerbate wear, making fuel quality and maintenance adherence critical.
Analysis derived from Land Rover technical bulletins (2021-2025) and UK DVSA failure statistics (2023-2026). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about LAND-ROVER 406PN.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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