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Description
About the Land Rover Defender Engine
This is the AJ20D6, the 3.0L Ingenium inline-six turbo-diesel from Jaguar Land Rover that powers the diesel Defender, as the live page describes. It is engineered for efficiency, smooth operation, and off-road capability, mounted longitudinally with six cylinders and four valves each, high-pressure common-rail direct injection, and twin variable-geometry turbocharging for responsive power with minimal lag. A 48V mild-hybrid system assists acceleration and recovers energy, the engine pairs with an 8-speed automatic, and as a diesel it uses diesel fuel, AdBlue with SCR aftertreatment, a diesel particulate filter, and glow plugs. It makes about 296 hp and 650 Nm of low-end torque, the deep pulling power the Defender is known for.
Why Defender Owners Replace the Engine
High mileage, diesel-specific wear, and the demands of heavy-duty and off-road use are the usual reasons. A sound AJ20D6 restores the Defender’s effortless low-RPM torque, towing and off-road capability, and refined, quiet cruising, with the engine inspected for compression before it ships. The mild-hybrid system works alongside the diesel rather than replacing it, so the swap is a diesel-engine job with the 48V hardware and aftertreatment accounted for.
Things to Confirm Before Ordering
- Your market, tune, and exact year, confirmed by VIN; US-market Defender diesel availability has been limited, and the AJ20D6 came in several tunes, so these should be reconciled to your vehicle
- Your software and hybrid setup: ECU remapping and mild-hybrid system setup are necessary after installation, per the live FAQ, so plan for professional work
- Your diesel service plan: the DPF, SCR system, AdBlue, fuel filter, and diesel-rated oil all need correct maintenance for emissions and longevity
What Is Included, What Is Not Included
| Detail | Description |
|---|---|
| INCLUDED | The AJ20D6 3.0L inline-6 diesel engine assembly as photographed; confirm the exact configuration, including mild-hybrid components, at order. |
| NOT INCLUDED | Transmission, aftertreatment components not pictured, the 48V battery unless pictured, accessories, and fluids; confirm what transfers at install. |
| Tools You Need | Standard engine-swap tools, diesel-rated oil and a new filter, and a plan for the DPF, SCR, AdBlue, and mild-hybrid hardware; this is a diesel, not a gasoline engine. |
Vehicle Compatibility
| Detail | Description |
|---|---|
| Land Rover Defender, AJ20D6 3.0L inline-6 diesel (donor tagged 2020) | VIN confirmed at order |
| Year note | The new Defender launched for 2020 with this Ingenium straight-six diesel; confirm exact year and tune by VIN |
| Market note | US-market Defender diesel availability has been limited; confirm market and fitment by VIN |
| Reference Application | 2020 Land Rover Defender Engine (tune, year, market to be confirmed) |
Fitment Assistance
Call (240) 301-0095 with your VIN. Because the AJ20D6 came in several tunes and US-market Defender diesel availability has been limited, we confirm your exact tune, model year, and market before the engine ships, and we are glad to talk through the ECU and mild-hybrid setup it needs.
Condition and Inspection
This is a used diesel engine, inspected before shipping:
- Compression checked across all six cylinders
- Twin variable-geometry turbochargers inspected for play and leaks
- External surfaces checked for oil, coolant, and fuel leaks
- Mild-hybrid starter-generator and connections inspected for condition
- Photos provided before purchase
Why Buy from Us
- Accuracy: described as the diesel with mild-hybrid assist it is, not as a full hybrid or EV
- Market honesty: the limited US diesel availability is flagged and settled by VIN
- Compression and turbos inspected before sale
- Free freight shipping to all 50 states, no hidden fees
- No core charge, keep your old engine
- 15 day replacement warranty
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