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 .
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.
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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 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.
Aftermarket ECU tuning is common on the 18-K4G 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.
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
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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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