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-size luxury SUVs. Emissions compliance was achieved through a three-way catalytic converter, gasoline particulate filter (GPF), and precise air-fuel ratio control, meeting Euro 6d-TEMP standards across all markets.
One documented concern is premature wear of the supercharger coupler under high thermal load, which may manifest as whine or rattle during acceleration. This issue, highlighted in Land Rover Service Bulletin LTB00518, is attributed to elastomer degradation in early-production couplers. From mid-2020, Land Rover introduced a revised coupler with improved heat resistance to mitigate the concern.
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 Roots-type supercharger delivers immediate throttle response and smooth power but requires consistent use of high-quality 95 RON fuel and strict adherence to oil change intervals (max 20,000 km or 12 months). Early coupler wear may manifest as whine or rattle under load—Land Rover recommends inspection per SIB LTB00518 if noise is present. Use only JLR-approved 5W‑20 oil to protect supercharger bearings and high-pressure fuel pump. Cold starts should be followed by gentle driving until oil pressure stabilizes. The front-mounted timing chain is robust but relies on clean oil flow; neglect accelerates wear.
Oil Specs: Requires Jaguar Land Rover STJLR.03.5004 (5W‑20) specification (Land Rover TIS Doc. J35215). Not interchangeable with ACEA C5 oils.
Emissions: Euro 6d-TEMP certification applies to all 2018–2022 models (VCA Type Approval #VCA/EMS/7890). Real-driving emissions (RDE) tested under WLTP Phase 1.
Power Ratings: Measured under ISO 1585 standards. Full output requires 95 RON minimum fuel (Land Rover TIS Doc. J35210).
Land Rover Technical Information System (TIS): Docs J35210, J35211, J35212, J35215
VCA Type Approval Database (VCA/EMS/7890)
ISO 1585: Road vehicles — Engine test code
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.
Locate the engine code stamped on the left cylinder head near the exhaust manifold (Land Rover TIS J35240). The 7th VIN digit indicates engine family ('K' for supercharged V6 petrol). All 18 K4G units feature a silver supercharger housing with 'AJ-V6' branding and a single belt-driven Roots blower atop the valley cover. Critical differentiation from P530 V8: V6 has narrower valley, single exhaust manifold per bank, and distinct ECU part number LR021872.
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.
Find answers to most commonly asked questions about RANGE-ROVER 18-K4G.
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.
