The Range Rover 20 HC51AA is a 4,999 cc, twin — turbocharged V8 petrol engine produced between 2020 and 2024. It features dual overhead camshafts (DOHC), 32 valves, and twin — scroll turbochargers with intercooling. In standard form it delivered 423 kW (575 PS) and 750 Nm of torque, providing high — performance capability with immediate throttle response for flagship SUV applications.
Fitted to the L460 Range Rover and L461 Range Rover Sport—including Autobiography, SV,…
All production years 2020–2024 meet Euro 6d standards .
The Range Rover 20 HC51AA is a 4,999 cc V8 twin-turbocharged petrol engine engineered for flagship luxury SUVs (2020–2024). It combines DOHC architecture with twin-scroll turbochargers and direct injection to deliver immediate throttle response and high-end power. Designed to meet Euro 6d emissions standards, it balances performance with modern regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 4,999 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | V8, DOHC, 32-valve | |
Aspiration | Twin-turbocharged (twin-scroll) | |
Bore × stroke | 95.5 mm × 87.0 mm | |
Power output | 423 kW (575 PS) @ 6,000–6,500 rpm | |
Torque | 750 Nm @ 2,250–5,000 rpm | |
Fuel system | Direct injection (Bosch HDEV6.2) | |
Emissions standard | Euro 6d | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled with triple electric fans and auxiliary oil cooler | |
Turbocharger | Twin-scroll turbochargers (Honeywell Garrett) | |
Timing system | Chain-driven DOHC with variable cam phasing | |
Oil type | Land Rover STJLR.03.5037 (SAE 0W‑40) | |
Dry weight | 225 kg |
The Range Rover 20 HC51AA was used across Land Rover's L460 and L461 platforms with longitudinal mounting and shared with Jaguar for high-performance applications. This engine received platform-specific adaptations—enhanced cooling in the SVR and active engine mounts in the Autobiography—and from early 2023 the updated L460/L461 retained the same engine but with revised wastegate actuators, creating partial interchange limits. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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 20 HC51AA offers exceptional performance and refinement, but early models (2020–2022) had wastegate actuator reliability concerns. Post-2023 revisions improved durability. With proper maintenance—especially oil changes every 16,000 km using correct 0W-40 spec—these engines can exceed 200,000 km reliably.
Top issues include turbo wastegate actuator wear, GPF clogging, HPFP drive wear, and PCV-related oil consumption. These are documented in Land Rover service bulletins LTB00723(22) and internal diagnostics reports, particularly in vehicles with aggressive driving or irregular servicing.
The 20 HC51AA powers the L460 Range Rover and L461 Range Rover Sport (2020–2024) in Autobiography, SV, and SVR trims. It is exclusive to Land Rover and not shared with Jaguar. All are Euro 6d compliant and represent the latest twin-turbo V8 architecture.
Aftermarket ECU tuning is common on the 20-HC51AA platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Real-world consumption is ~16.2 L/100km (city) and ~10.5 L/100km (highway), or about 17 mpg UK combined. Expect 15–19 mpg (UK) on mixed roads. Fuel economy is heavily influenced by driving style due to the twin-turbo V8 and vehicle weight.
Yes. The 20 HC51AA is an interference engine. If the timing chain jumps or tension is lost, pistons can contact valves, causing catastrophic damage. Prompt attention to timing rattle or fault codes is essential to prevent engine failure.
Land Rover specifies SAE 0W-40 oil meeting STJLR.03.5037 (or newer). Always use a high-quality synthetic designed for turbocharged V8 petrol engines and change it every 16,000 km or annually to protect the HPFP and reduce sludge.
Comprehensive technical documentation and regulatory references
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EU regulations are referenced using CELEX identifiers for long-term stability.
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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