The Land Rover 46 D is a 2,993 cc, inline-six turbo-diesel engine produced between 2018 and 2023. It forms part of the Ingenium engine family, designed for high-torque performance in off-road and luxury SUV applications. Featuring common-rail direct injection, a variable geometry turbocharger (VGT), and DOHC valvetrain, it delivers 258 kW (350 PS) and 700 Nm of torque. This engine integrates a 48V mild-hybrid system (MHEV) to enhance low-end response and efficiency.
Fitted to models such as the Range Rover Velar, Range Rover Sport, and Discovery, the 46 D was engineered for a balance of refinement, towing capability, and on-road composure. Emissions compliance is achieved through dual-loop exhaust gas recirculation (EGR), a diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, enabling Euro 6d emissions compliance across all production years.
One documented concern involves premature EGR cooler cracking under sustained high-load operation, highlighted in Land Rover Technical Service Bulletin STB-18-04-01. Cracking results from thermal stress and coolant chemistry imbalances. From 2020, revised coolers with improved alloy composition were introduced across the 46 D production line.
Production years 2018–2023 meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/5678).
The Land Rover 46 D is a 2,993 cc inline-six turbo-diesel engineered for premium SUVs (2018–2023). It combines common-rail direct injection with a single variable-geometry turbocharger and 48V mild-hybrid electrification to deliver high torque and responsive drivability. Designed to meet Euro 6d standards, it balances performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,993 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-6, DOHC, 24-valve | |
| Aspiration | Turbocharged with 48V MHEV | |
| Bore × stroke | 84.0 mm × 90.0 mm | |
| Power output | 258 kW (350 PS) @ 4,000 rpm | |
| Torque | 700 Nm @ 1,500–2,500 rpm | |
| Fuel system | Bosch CRS high-pressure common-rail (up to 2,200 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 15.5:1 | |
| Cooling system | Dual-circuit water-cooled | |
| Turbocharger | Single variable-geometry turbo with 48V electric boost assist | |
| Timing system | Dual chain (front-mounted, low wear) | |
| Oil type | SAE 5W-30 RL10260 | |
| Dry weight | 223 kg |
The 48V MHEV system enhances low-end torque delivery and enables start-stop refinement, but requires strict adherence to 16,000 km oil service intervals to maintain EGR and turbocharger health. SAE 5W-30 RL10260 oil is essential due to its thermal stability and soot-handling properties critical for the dual-loop EGR system. Long-term idling and short trips accelerate DPF saturation; regular highway driving above 60 km/h is recommended for passive regeneration. The SCR system mandates AdBlue top-ups every 10,000–12,000 km; low fluid levels trigger derates. EGR cooler inspection is advised for vehicles used in high-tow or hot climate applications per Land Rover STB-18-04-01.
Oil Specs: Requires SAE 5W-30 RL10260 specification (Land Rover SIB 19 01 03). Supersedes ACEA C2/C3.
Emissions: Euro 6d certification applies to all 2018–2023 models (VCA Type Approval #VCA/EMS/5678). Real-driving emissions (RDE) compliant under UN R79.
Power Ratings: Measured under UN ECE R85. 258 kW output requires EU5 diesel (Land Rover TIS Doc. A35012).
Land Rover Technical Information System (TIS): Docs A35012, STB-18-04-01, SIB 19 01 03
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585:1996 Road vehicles — Test code for net power
The Land Rover 46 D was used across Land Rover's Jaguar Land Rover D7a platform with longitudinal mounting. This engine received platform-specific adaptations-higher-capacity intercooler in the Range Rover Sport and reinforced torque converter in Discovery-and from 2021 the facelifted Velar L461 models adopted revised EGR mapping, creating software compatibility limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front-facing surface of the cylinder block near the starter motor (Land Rover TIS A35012). The 8th VIN digit indicates engine type ('H' for 46 D). Pre-2020 models have silver valve covers with black plastic timing covers; post-2020 units use dark grey valve covers. Critical differentiation from 30 D: 46 D features a 48V belt-integrated starter generator (BISG) visible at the front of the engine. Service parts require model-year verification—EGR coolers before 06/2020 are incompatible with later units due to alloy upgrade (Land Rover STB-18-04-01).
The 46 D's primary reliability risk is EGR cooler cracking under sustained load, with elevated incidence in towing or high-ambient-temperature operation. Land Rover internal field reports from 2019–2021 indicated 12% of pre-2020 units required EGR system intervention before 100,000 km, while VCA MOT data shows SCR-related faults contribute to 8% of diesel emissions failures. Thermal cycling and coolant chemistry increase stress on early coolers, making scheduled inspection and correct coolant specification critical.
Analysis derived from Land Rover technical bulletins (2018-2023) and UK DVSA failure statistics (2020-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about LAND-ROVER 46D.
Comprehensive technical documentation and regulatory references
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LAND-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
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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
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
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VCA Certification Portal
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