The Range Rover 18 K4K is a 4,999 cc, V8 supercharged petrol engine produced between 2018 and 2020. 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 (2018–2020 MY), the 18 K4K was…
Production years 2018–2020 meet Euro 6d-Temp standards (VCA UK Type Approval #VCA/EMS/9123). No Euro 6d-Final variants were produced for this engine code.
The Range Rover 18 K4K is a 4,999 cc supercharged V8 petrol engine engineered for full-size luxury SUVs (2018–2020). 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-Temp 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-Temp | |
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 | Land Rover-approved SAE 5W‑30 (ACEA C2/C3) | |
Dry weight | 225 kg |
The Range Rover 18 K4K 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 2021 was replaced by the mild-hybrid AJ-V8 variants, creating hard interchange limits. All adaptations are documented in OEM technical bulletins.
The 18 K4K's primary reliability risk is supercharger coupler wear under sustained high-load conditions, with elevated incidence in performance-oriented or towing usage. Land Rover internal quality data from 2020 indicated a notable share of pre-2020 engines requiring coupler replacement before 100,000 km, while UK DVSA records show GPF-related faults as a common MOT emissions failure in short-trip vehicles. Frequent high-RPM operation and insufficient cool-down periods accelerate component fatigue, making oil quality and driving pattern critical.
Analysis derived from Land Rover technical bulletins (2018–2021) and UK DVSA failure statistics (2015–2023). 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 K4K offers exhilarating supercharged V8 performance but early models (2018–2020) had supercharger coupler concerns. Post‑mid‑2020 revisions improved durability. With regular oil changes using ACEA C2/C3 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, 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 2018 to 2020 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.
Yes. The 18 K4K responds well to ECU remapping, with stage 1 tunes yielding ~30–40 kW gains. Supporting modifications (upgraded intercooler, fuel system) allow further increases. However, excessive tuning accelerates supercharger and drivetrain wear. Most owners retain stock or mild tunes for daily reliability.
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 18 K4K 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 C2/C3 and JLR STJLR.03.5006 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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GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
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Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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GOV.UK: Vehicle Approval
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