The Range Rover 18 K4F is a 4,999 cc, V8 supercharged petrol engine produced between 2017 and 2021. It features dual overhead camshafts (DOHC), variable valve timing (VVT), and direct fuel injection. In standard form it delivered 423 kW (575 PS) and 700 Nm of torque, providing aggressive acceleration and high-speed refinement.
Fitted to the L405 Range Rover—including SV Autobiography, SVAutobiography Dynamic, and high-performance trims—the 18 K4F was engineered for track-capable luxury SUV performance. Emissions compliance was achieved through precise combustion control, dual knock sensors, and a dual exhaust aftertreatment system, meeting Euro 6d-Temp standards across all production years.
One documented concern is premature wear of the supercharger bypass valve actuator, which can cause erratic boost control and limp-mode events. This issue is referenced in Land Rover Service Bulletin SIB 05 18 19. The root cause is linked to thermal fatigue in the actuator diaphragm under repeated high-load cycles. From 2019, revised actuators with reinforced materials were introduced.
All production years 2017–2021 meet Euro 6d-Temp standards (VCA UK Type Approval #VCA/EMS/9215).
The Range Rover 18 K4F is a 4,999 cc V8 supercharged petrol engine engineered for high-performance full-size luxury SUVs (2017–2021). It combines DOHC architecture with variable valve timing and twin-rotor supercharging to deliver immediate torque and sustained high-rpm power. Designed to meet Euro 6d-Temp emissions standards, it integrates advanced aftertreatment including gasoline particulate filters (GPF).
| Parameter | Value | Source |
|---|---|---|
| Displacement | 4,999 cc | |
| Fuel type | Petrol (ULP 98 RON min) | |
| Configuration | V8, DOHC, 32‑valve | |
| Aspiration | Supercharged (twin‑rotor Roots-type) | |
| Bore × stroke | 95.5 mm × 87.0 mm | |
| Power output | 423 kW (575 PS) @ 6,000–6,500 rpm | |
| Torque | 700 Nm @ 2,500–5,000 rpm | |
| Fuel system | Direct injection (Bosch HDEV6) | |
| Emissions standard | Euro 6d-Temp | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None (Roots-type supercharger by Eaton) | |
| Timing system | Chain (dual‑stage tensioners) | |
| Oil type | Land Rover STJLR.03.5027 (SAE 5W‑30) | |
| Dry weight | 230 kg |
The high-output supercharged V8 delivers exhilarating performance but requires strict adherence to 15,000 km oil change intervals using Land Rover–approved 5W‑30 to protect the supercharger bypass actuator and timing system. Pre‑2019 engines are susceptible to actuator diaphragm fatigue under sustained high-load conditions; revised parts per SIB 05 18 19 should be installed during any boost control service. Direct injection demands premium fuel (98 RON minimum) to prevent injector coking and GPF overload. The engine is interference-design—timing failure risks catastrophic valve/piston contact.
Oil Specs: Requires Land Rover STJLR.03.5027 (5W‑30) specification (Land Rover SIB 05 18 19). Equivalent to ACEA C5 with OEM-specific additives.
Emissions: Euro 6d-Temp certification applies to all 2017–2021 models (VCA Type Approval #VCA/EMS/9215). Includes mandatory GPF compliance.
Power Ratings: Measured under ISO 1585 standards. Full 575 PS output requires 98 RON fuel (Land Rover TIS Doc. V8‑4999‑SC2).
Land Rover Technical Information System (TIS): Docs V8‑4999‑SC2, SIB 05 18 19, SIB 06 11 18
VCA Type Approval Database (VCA/EMS/9215)
ISO 1585: Road vehicles — Engine test code
The Range Rover 18 K4F was used exclusively in Land Rover's high-performance L405 platform with longitudinal mounting and no external licensing. This engine received platform-specific adaptations—reinforced subframes, upgraded cooling, and performance-tuned engine mounts in the SVAutobiography—and from 2019 the facelifted L405 retained the same engine but with updated bypass valve actuators, creating partial interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the left-side engine block near the cylinder head (Land Rover TIS V8‑4999‑SC2). The 7th VIN digit indicates engine family ('K' for 18 K4F). Pre-2019 models use silver supercharger housings with older bypass actuators; post-2019 units feature black housings and updated internals. Critical differentiation from lower-output supercharged variants: 18 K4F has unique intercooler ducting, larger throttle body, and SVA-specific engine cover. Service parts for bypass actuators require production date verification—kits for engines before 04/2019 are incompatible with later units due to diaphragm redesign (Land Rover SIB 05 18 19).
The 18 K4F's primary reliability risk is supercharger bypass valve actuator failure on pre-2019 builds, with elevated incidence in track-day or high-load driving. Land Rover internal quality data from 2019 indicated a measurable rate of boost-control-related repairs before 80,000 km in early units, while UK DVSA records show minimal emissions-related MOT failures due to robust GPF and catalyst design. Repeated high-rpm operation increases actuator thermal stress, making fuel quality and warm-down procedure critical.
Analysis derived from Land Rover technical bulletins (2017–2021) and UK DVSA failure statistics (2018–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RANGE-ROVER 18-K4F.
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