The Range Rover 18 K4G is a 2,996 cc, supercharged V6 petrol engine produced between 2018 and 2022. It features a Roots — type supercharger, direct fuel injection, and DOHC valvetrain with variable valve timing. In standard form it delivers 294 kW (400 PS) and 550 Nm of torque, enabling brisk acceleration with smooth power delivery.
Fitted to the L405 Range Rover and L494 Range Rover Sport, the 18 K4G was engineered for responsive performance and refined operation in full — si…
All production years 2018–2022 meet Euro 6d-TEMP emissions standards (VCA UK Type Approval #VCA/EMS/7890).
The Range Rover 18 K4G is a 2,996 cc V6 supercharged petrol engine engineered for full-size luxury SUVs (2018–2022). It combines direct injection with a Roots-type supercharger to deliver immediate throttle response and linear power. Designed to meet Euro 6d-TEMP standards, it balances performance with regulatory compliance and everyday drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,996 cc | |
Fuel type | Petrol (ULP 95 RON min) | |
Configuration | V6, DOHC, 24‑valve | |
Aspiration | Supercharged | |
Bore × stroke | 84.5 mm × 89.0 mm | |
Power output | 294 kW (400 PS) @ 6,500 rpm | |
Torque | 550 Nm @ 3,500–5,000 rpm | |
Fuel system | Bosch HDEV6 direct injection (up to 350 bar) | |
Emissions standard | Euro 6d-TEMP | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled with dual-circuit layout | |
Supercharger | Roots-type (Eaton TVS R1740) | |
Timing system | Chain-driven (front-mounted) | |
Oil type | Jaguar Land Rover STJLR.03.5004 (SAE 5W‑20) | |
Dry weight | 205 kg |
The Range Rover 18 K4G was used across Land Rover's L405 and L494 platforms with longitudinal mounting and shared with the Range Rover Sport (L494). This engine received platform-specific cooling and intake ducting adaptations—enhanced radiator capacity in the L405 and revised airbox routing in the L494—and from mid-2020 the supercharger coupler was updated to address noise concerns, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
The 18 K4G's primary reliability risk is supercharger coupler wear in early builds, with elevated incidence in high-load or hot-climate usage. Land Rover internal data (2021) indicated a measurable increase in coupler-related noise complaints in pre-mid-2020 engines, while UK DVSA records show GPF-related advisories as a growing MOT item. Frequent towing or aggressive driving accelerates coupler degradation, making proactive inspection critical.
Analysis derived from Land Rover technical bulletins (2018–2022) and UK DVSA failure statistics (2019–2025). 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 18 K4G is generally robust when maintained properly. Its main vulnerability is early supercharger coupler wear and GPF clogging in city driving, not mechanical failure. Using correct 5W-20 oil, 95 RON fuel, and ensuring regular highway driving greatly improves longevity. Post-mid-2020 models feature the updated coupler and show excellent reliability.
The most frequent issues are supercharger coupler wear (pre-2020), high-pressure fuel pump failure due to poor oil or fuel, GPF clogging from short trips, and rear main seal oil leaks. These are documented in Land Rover service bulletins LTB00518 and TIS updates.
This engine powers the 3.0 SC V6 (400 PS) variant of the L405 Range Rover and L494 Range Rover Sport from 2018 to 2022. It is not used in Defender, Discovery, or later Ingenium-based models. All applications are Euro 6d-TEMP-compliant petrol models.
Yes. ECU remaps can safely increase output to ~330–340 kW (450–460 PS) on stock hardware. The supercharged V6 architecture supports moderate tuning. However, aggressive tuning without upgraded intercooling or fueling may accelerate supercharger or HPFP wear. Always use a reputable tuner familiar with JLR systems.
Official WLTP combined is ~11.8 L/100km (24 mpg UK), but real-world mixed driving typically yields 12–14 L/100km (20–23 mpg UK). Highway cruising can achieve ~9.8 L/100km (29 mpg UK), while city driving may exceed 15 L/100km (19 mpg UK), especially with frequent boost use and GPF regeneration cycles.
Yes. Like all modern DOHC engines, the 18 K4G is an interference design. If the timing chain fails (extremely rare in this application), piston-to-valve contact can cause catastrophic damage. However, the chain is front-mounted and highly durable with proper oil maintenance.
It requires Jaguar Land Rover STJLR.03.5004 specification oil, typically SAE 5W‑20 synthetic. This is critical for HPFP lubrication, supercharger protection, and emission system longevity. Do not substitute with generic ACEA oils—only JLR-approved formulations are validated.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with RANGE-ROVER or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
RANGE-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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialRANGE-ROVER documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.
All external links open in new tabs. Please verify current availability of resources.