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…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The 18 K4F offers exceptional supercharged V8 performance but early models (2017–2018) have bypass actuator concerns. Post-2019 revisions improved durability significantly. With proper maintenance—especially oil changes using correct 5W-30 spec and premium 98 RON fuel—these engines can exceed 150,000 km reliably in spirited use.
Top issues include supercharger bypass actuator failure (pre-2019), GPF clogging from short trips, valley cover oil leaks, and electric coolant pump failures. All are documented in Land Rover service bulletins, particularly SIB 05 18 19 for actuator concerns.
This 5.0L supercharged V8 powered the L405 Range Rover SVAutobiography and SVAutobiography Dynamic (2017–2021). It is the highest-output petrol variant—distinct from the 375 kW 14 K4C used in standard Supercharged models.
Yes. The 18 K4F responds well to ECU remaps (+40–60 kW typical) and pulley upgrades. Stock internals handle up to ~650 PS reliably. Most tuners recommend upgraded intercoolers, fuel system, and GPF delete (where legal) for stage 2+ modifications.
Real-world consumption is ~18.5 L/100km (city) and ~12.8 L/100km (highway), or about 15 mpg UK combined. Expect 13–18 mpg (UK) depending on driving style. Fuel demand increases dramatically under load or in urban stop-start conditions.
Yes. The 18 K4F is an interference engine. If the timing chain jumps or breaks, pistons can collide with open valves, causing severe internal damage. Prompt attention to any timing rattle is essential to prevent catastrophic failure.
Land Rover specifies SAE 5W-30 synthetic oil meeting STJLR.03.5027 (or equivalent ACEA C5 with OEM approval). Always use high-quality oil and change every 15,000 km or annually to protect the supercharger and timing system.
Comprehensive technical documentation and regulatory references
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RANGE-ROVER Official Site
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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.
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