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 per…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The 406PN Petrol is generally reliable when maintained properly, though early models (2021–2022) had higher rates of HPFP failure. Later revisions improved pump durability and ECU mapping. Regular oil changes with LR032278-specified 5W-30 and use of premium fuel greatly enhance longevity. Well-maintained units can exceed 150,000 km without major repairs.
Key issues include high-pressure fuel pump failure, turbo wastegate actuator sticking, intake valve carbon buildup, and mild hybrid system faults. These are documented in Land Rover service bulletin RT/TC/21/08. Direct injection and turbocharging contribute to these wear patterns, especially under aggressive or urban driving conditions.
The 406PN Petrol was used in the Land Rover Range Rover SV (2022–2025) and Range Rover Sport SVR (2021–2025). It is a high-performance variant exclusive to SV models and not available in standard trims. All models feature longitudinal engine layouts with all-wheel drive configurations.
Yes. The 406PN Petrol responds well to ECU remapping, with stage 1 tunes typically adding +40–60 kW. The stock turbo and internals support moderate increases, but supporting mods like intercooler upgrades are recommended for sustained performance. Tuning must preserve OEM safety thresholds to avoid pre-ignition or knock sensor issues.
In the Range Rover SV, combined consumption is approximately 15.8 L/100km (18 mpg UK). City driving may see 18.2 L/100km (15 mpg), while highway runs can achieve 13.4 L/100km (21 mpg). Real-world efficiency depends on driving style, with aggressive use reducing economy significantly due to turbo demand.
Yes. The 406PN Petrol is an interference engine. If the timing chain fails or skips, pistons can contact open valves, resulting in bent valves or piston damage. Chain maintenance is essential—any abnormal noise from the front cover should prompt immediate inspection.
Land Rover specifies LR032278 (5W-30) synthetic oil, meeting API SN/CF and ACEA A1/B1 standards. Oil must be changed every 12,000 km or annually to protect the turbocharger and prevent carbon buildup. Using non-compliant oil may void warranty and accelerate wear in high-temperature areas.
Comprehensive technical documentation and regulatory references
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LAND-ROVER Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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