The Range Rover 20 HSC is a 4,999 cc, V8 supercharged petrol engine produced between 2020 and 2023. It features a dual overhead camshaft (DOHC) layout with 32 valves and electronic sequential fuel injection. In standard form it delivered 423 kW (575 PS) and 700 Nm of torque, providing high — performance capability with immediate throttle response typical of forced — induction V8s.
Fitted exclusively to the L405 Range Rover and Range Rover Sport (2020–2023 MY), the 20 HSC was…
Production years 2020–2023 meet Euro 6d-Final standards .
The Range Rover 20 HSC is a 4,999 cc supercharged V8 petrol engine engineered for full-size luxury SUVs (2020–2023). It combines DOHC architecture with dual fuel injection (direct + port) and an Eaton TVS supercharger to deliver high specific output and immediate torque response. Designed to meet Euro 6d-Final emissions standards, it balances performance with stringent regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 4,999 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | V8, DOHC, 32‑valve | |
Aspiration | Supercharged | |
Bore × stroke | 95.5 mm × 87.0 mm | |
Power output | 423 kW (575 PS) @ 6,500 rpm | |
Torque | 700 Nm @ 3,500 rpm | |
Fuel system | Bosch ME17.2.9 dual injection (direct + port) | |
Emissions standard | Euro 6d-Final | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled with dual electric fans and auxiliary oil cooler | |
Turbocharger | None (Eaton TVS R1740 supercharger) | |
Timing system | Dual chain with hydraulic tensioners | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 225 kg |
The Range Rover 20 HSC was used exclusively in Land Rover's L405 platform with longitudinal mounting and no external licensing. This engine received platform-specific adaptations—reinforced transmission bellhousing, upgraded intercooler, and bespoke engine mounts—and from 2024 was replaced by the mild-hybrid AJ-V8 variants, creating hard 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.
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The 20 HSC offers exhilarating supercharged V8 performance with improved durability over earlier variants. Post‑late‑2022 revisions addressed supercharger coupler concerns. With regular oil changes using ACEA C5 5W‑30, proper cool-down after hard driving, and attention to GPF health, it can be dependable beyond 200,000 km.
Top issues include supercharger coupler wear (pre-late-2022), GPF clogging in short-trip use, intercooler hose leaks, and ignition coil failures. These are documented in Land Rover TSBs and commonly seen in high-performance or urban-driven examples. Emissions-related faults are frequent without sufficient highway driving.
This engine was used only in the L405 Range Rover and L494 Range Rover Sport from model years 2020 to 2023 in the 5.0 V8 Supercharged variant. It was not shared with Jaguar or other Land Rover models. No transverse or licensed applications exist for this engine code.
Aftermarket ECU tuning is common on the 20-HSC 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 ~18.5 L/100km (city) and ~12.8 L/100km (highway), or about 15 mpg UK combined. Expect 14–17 mpg (UK) on mixed roads. Fuel economy suffers significantly with aggressive driving or short trips due to the large displacement, supercharger load, and vehicle weight.
Yes. The 20 HSC is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic damage. Prompt attention to chain noise or timing faults is essential to avoid major repairs.
Land Rover specifies SAE 5W‑30 synthetic oil meeting ACEA C5 and JLR STJLR.03.5008 standards. Change every 16,000 km or annually. Correct low-SAPS oil is vital for GPF protection and timing chain lubrication in the supercharged V8’s high-stress environment.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
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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