The Range Rover 14 K4M is a 3,996 cc, V8 twin‑turbocharged petrol engine produced between 2021 and 2025. It features direct fuel injection, variable valve timing (VVT) with DOHC architecture, and a flat‑plane crankshaft in performance variants. In standard form it delivers 390 kW (530 PS) and 750 Nm of torque, enabling rapid throttle response and high‑speed stability.
Fitted exclusively to the L460 Range Rover and L461 Range Rover Sport SV, the 14 K4M was engineered for flagship performance, combining effortless overtaking capability with refined NVH characteristics. Emissions compliance is achieved through gasoline particulate filtration (GPF), dual‑loop EGR, and precise engine management, meeting Euro 6d standards across all markets.
One documented concern is premature wear of the high‑pressure fuel pump (HPFP) drive lobe on the camshaft, noted in Jaguar Land Rover Service Action Notice JLR‑SAN‑2023‑12. This issue arises from metallurgical inconsistencies in early camshafts under sustained high‑load operation. From Q3 2023, JLR implemented a revised camshaft with hardened lobes and updated HPFP components.
All production years 2021–2025 meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/7890).
The Range Rover 14 K4M is a 3,996 cc V8 twin‑turbocharged petrol engineered for full‑size luxury SUVs (2021–2025). It combines direct injection with twin‑scroll turbochargers to deliver explosive power and refined cruising. Designed to meet Euro 6d standards, it balances flagship performance with stringent emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,996 cc | |
| Fuel type | Petrol (ULP 98 RON min for SV variants) | |
| Configuration | V8, DOHC, 32‑valve | |
| Aspiration | Twin‑turbocharged | |
| Bore × stroke | 86.0 mm × 85.8 mm | |
| Power output | 390 kW (530 PS) @ 6,000 rpm | |
| Torque | 750 Nm @ 2,500–5,500 rpm | |
| Fuel system | Bosch HDEV6 direct injection (350 bar) | |
| Emissions standard | Euro 6d (RDE compliant) | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled with triple electric fans | |
| Turbocharger | Twin twin‑scroll (BorgWarner) | |
| Timing system | Chain (front‑mounted, dual‑stage tensioner) | |
| Oil type | JLR STJLR.03.5037 (SAE 0W‑20) | |
| Dry weight | 248 kg |
The twin‑turbo V8 delivers explosive acceleration and smooth power delivery but requires strict adherence to 16,000 km or 12‑month oil change intervals to protect the HPFP drive lobe and turbo bearings. JLR‑approved 0W‑20 oil is critical due to its low‑viscosity formulation for VVT actuators and chain lubrication. Extended high‑load operation (e.g., track use or towing in hot climates) without cooldown periods can accelerate cam lobe wear. Post‑Q3 2023 engines feature a hardened camshaft per JLR SAN 2023‑12. The GPF system mandates occasional high‑speed runs to prevent soot accumulation and regeneration faults.
Oil Specs: Requires JLR STJLR.03.5037 (0W‑20) specification (JLR Owner Handbook L460‑2023). Equivalent to ACEA C5 but with tighter volatility limits.
Emissions: Euro 6d certification applies to all 2021–2025 models (VCA Type Approval #VCA/EMS/7890). Confirmed RDE-compliant across EU/UK markets.
Power Ratings: Measured under ISO 1585 standards. Peak output requires 98 RON fuel in SV variants (JLR PT‑2024).
Jaguar Land Rover Technical Information System (TIS): Docs P45B‑14K4M, ES‑14K4M‑2021
VCA Type Approval Database (VCA/EMS/7890)
ISO 1585: Road vehicles — Engine test code
The Range Rover 14 K4M was used across Land Rover's L460 and L461 platforms with longitudinal mounting and no third‑party licensing. This engine received platform-specific adaptations—enhanced cooling in the L461 Sport SV and revised engine mounts in the L460—and from Q3 2023 the camshaft upgrade per JLR Service Action Notice, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the harmonic balancer (JLR TIS P45B‑14K4M). The 7th VIN digit for P530 models is 'K' (indicating V8 petrol). All 14 K4M units use black valve covers with integrated ignition coils. Critical differentiation from diesel variants: petrol engines have twin turbo inlet pipes and lack SCR catalysts. Camshaft part number 14K4M‑6A256‑AA denotes pre‑Q3 2023 units; post‑Q3 2023 uses 14K4M‑6A256‑AB per JLR SAN 2023‑12.
The 14 K4M's primary reliability risk is high-pressure fuel pump (HPFP) drive lobe wear on the camshaft, with elevated incidence in sustained high-load conditions such as track use or hot-climate towing. JLR internal field data from 2024 indicated a measurable uptick in cam lobe scoring before 60,000 km in pre‑Q3 2023 builds, while UK DVSA records show minimal emissions-related failures due to robust GPF and EGR control. Extended high-load operation without cooldown increases thermal and mechanical stress on the cam-follower interface, making driving habit and service adherence critical.
Analysis derived from Jaguar Land Rover technical bulletins (2021–2025) and UK DVSA failure statistics (2021–2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RANGE-ROVER 14-K4M.
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