Jaguar Aj25 Engine Replacement - Rebuilt & Reconditioned Units from £1,895

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Land Rover D204 Ingenium Engines

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Jaguar Land Rover 2.0L AJ25 Turbo Diesel Engine

A Refined Successor to the 2.2L Duratorq

The AJ25 2.0L turbo diesel engine was introduced by Jaguar Land Rover as part of its Ingenium-derived diesel lineup around 2014, designed to phase out the older Ford-sourced 2.2L Duratorq ZSD engine. Manufactured in the UK at JLR’s Wolverhampton facility, the AJ25 is built on a lightweight aluminium monobloc architecture and optimized for improved efficiency, smoother torque delivery, and tighter emissions compliance under Euro 6 standards.


This four-cylinder inline diesel engine features common rail direct injection, a single-scroll turbocharger with intercooler, low-friction internal coatings, and an integrated exhaust manifold. Paired with either manual or automatic gearboxes, it delivers strong mid-range torque, ideal for both city and off-road applications. The AJ25 also integrates DPF and EGR systems to meet EU regulations, though remapping and hardware delete options remain popular among enthusiasts and off-road users.


The AJ25 was a key transitional engine between the Ford-era powertrains and JLR’s modular Ingenium strategy, offering greater fuel economy and NVH (noise-vibration-harshness) refinement over its predecessor. It is widely known in JLR models as the “TD4” or “SD4” depending on output variant and is a frequent choice for UK engine rebuilds due to its wide compatibility and reliability.


Common vehicles using this engine include the Land Rover Freelander 2 SD4, Range Rover Evoque TD4, and Discovery Sport 2.0 TD4. On the Jaguar side, the engine was also fitted to earlier trims of the Jaguar XE 2.0d and Jaguar XF 2.0 TD, offering a refined yet responsive diesel option for executive saloons.

Technical Specifications & Configuration

Engine Code
AJ25
Engine Size
1999cc / 2.0 Litres
Cylinder Configuration
Inline 4 cylinder (I4)
Aspiration
Turbocharged (Single & Twin Turbo variants)
Fuel Type
Diesel
Injection System
Common Rail Direct Injection
Valvetrain
DOHC - 16 valves with Variable Valve Timing
Compression Ratio
~15.5:1
Cooling System
Water cooled
Block Material
Aluminium Alloy
Head Material
Aluminium Alloy
Emission Standard
Euro 6 (with DPF & EGR fitted)
Power Output Range
150 - 204 PS (varies by model & year)
Torque Output
380 - 430 Nm
Turbo Configuration
Single or Twin Scroll (Model-dependent)
Fuel Economy (Est.)
40-55 MPG (varies by vehicle & driving style)

Common Configurations

  • Jaguar XE 2.0d: 180 PS, RWD, ZF 8-speed Automatic
  • Range Rover Evoque: TD4 AWD, 9-speed Automatic
  • Discovery Sport TD4: 150 PS variant with 6-speed Manual
  • Jaguar XF Prestige: 180 PS Diesel with Intelligent Stop/Start
  • Land Rover Freelander 2: SD4 190 PS with Terrain Response

Noteworthy Engineering Highlights

  • 🛠️Modular aluminium block: lightweight yet durable construction
  • 💨Water-cooled VGT turbo: ensures responsive performance across RPM range
  • ⚙️Integrated EGR with DPF heater: reduces NOx and improves cold-start efficiency
  • 🔧Revised timing chain system: improved durability over earlier Ingenium versions
  • 🌿EU6-compliant emissions: features AdBlue SCR tech for lower environmental impact

Engine Naming Reference

AJ25, TD4, SD4, 2.0d Ingenium, Jaguar 2.0 Diesel, Evoque Diesel Engine, JLR 2.0L I4, 204DTD, Freelander SD4, D150 / D180 / D200, Ingenium Diesel, Land Rover 2.0 Turbo Diesel

Types of Jaguar AJ25 Replacement Engines Available

Jaguar AJ25 Rebuilt Engines

High-performance rebuilds with OEM-grade pistons, gaskets & timing chains.

Jaguar AJ25 Remanufactured Engines

Every unit fully stripped and rebuilt to match factory tolerances.

Jaguar AJ25 Reconditioned Engines

Carefully inspected, cleaned, and restored by seasoned diesel specialists.

Jaguar AJ25 Replacement Engines

Direct-fit diesel engines ideal for quick swaps and no-hassle installations.

Jaguar AJ25 Refurbished Engines

Budget-friendly, tested units with clean internals and compression-verified heads.

Jaguar AJ25 Used Engines

Hand-selected from breakers and verified by our expert mechanics.

Compatible Models with AJ25 Engine

Land Rover Compatible Models

Land Rover Discovery Sport AJ25 2.0 Diesel Engine Compatibility

Discovery Sport Engines
Range Rover Evoque AJ25 Diesel Engine Fitment for 2.0L Models

Range Rover Evoque Engines
Land Rover Defender Compatible with AJ25 Ingenium 2.0L Engine

Defender Engines

Jaguar Models

Jaguar E-Pace AJ25 2.0 Diesel Engine Compatibility

Jaguar E-Pace Engines
Jaguar F-Pace Engine with AJ25 2.0L Ingenium Diesel Compatibility

Jaguar F-Pace Engines
Jaguar XE AJ25 2.0 Diesel Engine Variant Fitment (2018+)

Jaguar XE Engines

AJ25 Engine Applications


Land Rover Applications

Land Rover Logo
DISCOVERY SPORT 150-240HP
2016-2022
TD4 / SD4 Ingenium diesel trims
RANGE ROVER EVOQUE 150-240HP
2016-2023
2.0 TD4, D180, D240 engine variants
DEFENDER (L663) 200-240HP
2020-2023
2.0D Ingenium AJ25 diesel units

Jaguar Applications

Jaguar Logo
JAGUAR E-PACE 150-240HP
2017-2023
D150, D180, D240 variants
JAGUAR F-PACE 163-240HP
2016-2022
2.0D Prestige / R-Sport / Portfolio
JAGUAR XE 163-240HP
2018-2022
2.0D Ingenium AJ25 variants

⚠️ Note: If you're unsure whether your vehicle has the AJ25 engine, simply enter your registration number above or contact our support team for a free compatibility check.

Common AJ25 Engine Problems & Solutions


Pricing, Warranty & Availability

Most Popular

Rebuilt Jaguar AJ25 Ingenium Engine

From
£4,000
(Supply Only)
  • ✔ Fully Disassembled & Rebuilt
  • ✔ OEM-Grade Replaced Parts
  • ✔ Like-New Condition
  • ✔ 12-24 Month Warranty

Reconditioned Jaguar AJ25 Engine

From
£3,300
(Supply Only)
  • ✔ Professionally Reconditioned
  • ✔ Thoroughly Inspected & Tested
  • ✔ Restored to OEM Standard
  • ✔ 12 Month Warranty
Cheapest Option

Used Jaguar AJ25 Engine

From
£2,500
(Supply Only)
  • ✔ Basic Inspection
  • ✔ Compression Tested
  • ✔ Known Service History
  • ✔ 30 Days to 3 Month Warranty

Refurbished Jaguar AJ25 Engine

From
£2,900
(Supply Only)
  • ✔ Partial Overhaul
  • ✔ Key Component Replacement
  • ✔ Cost-effective Option
  • ✔ 3 to 6 Month Warranty

📦 Stock Availability & Delivery Time

  • 🔄 High availability across UK suppliers
  • 🚚 Next-day delivery on in-stock units (supply only)
  • 🛠️ 7-10 day turnaround for rebuilt units
  • 📦 Free UK mainland delivery (select suppliers)

⭐ What You Get With Every Jaguar AJ25 Engine

  • 🧰 OEM-quality rebuilds using JLR-approved parts
  • 🔎 Full inspection reports w/ compression & leak-down tests
  • 📋 Engine serial & block codes verified
  • 💬 UK-based support before & after sale
  • 🔄 Exchange options for faulty units
  • 🧾 Simple returns & warranty claims

Jaguar AJ25 Engine Reconditioning Process


STEP 1 1 Day

Initial Inspection & Diagnostic Reporting

  • Visual & Dimensional Checks: Deck flatness, bore wear, and head warpage.
  • Oil & Coolant Analysis: Detect fuel dilution, glycol traces, or contamination.
  • Compression Testing: Verify ring and valve sealing before teardown.
STEP 2 1-2 Days

Complete Strip Down & Component Cleaning

  • Media Blast Cleaning: Remove carbon & sludge from internals.
  • Chemical Degreasing: Clean oil pump, HPFP, and turbo cores.
  • Part Identification: Catalog rods, pistons, and cams for traceability.
STEP 3 2-3 Days

Non-Destructive Testing & Machining

  • Crack Testing: Magnaflux and dye penetrant for structural faults.
  • Boring & Honing: Re-bore cylinders and hone for correct finish.
  • Crank Grinding: Undersize grind and dynamic balance.
  • Surface Milling: Flatness to <0.03mm deviation.
STEP 4 1 Day

Component Replacement with OEM Parts

  • Pistons & Rings: Forged internals matched to rebored block.
  • Timing Kit: New chain, guides, tensioner, sprockets.
  • Seals & Gaskets: All major gaskets and seals replaced.
  • Water & Oil Pump: New OEM pumps with updated specs.
STEP 5 1 Day

Assembly & Torque Angle Verification

  • Sequential Torque: Head & main bolts torqued to spec.
  • Phaser Setup: Cam phasers installed and OCVs verified.
  • Injector Setup: Calibrated with precision flow test bench.
STEP 6 1 Day

Hot Bench Dyno & Road Simulation

  • Cold Start Test: Oil pressure and tensioner function verified.
  • Load Simulation: Urban/motorway load profiles checked for leaks and stability.
  • Compression & Emissions: Ring seal and smoke tested before dispatch.
Land Rover replacement engine - Engine Finders

Why Choose Engine Finders for Jaguar AJ25 Petrol Engine?

At Engine Finders, we don’t just sell engines - we deliver peace of mind. Here’s why Land Rover & Jaguar owners across the UK trust us:

  • ✔ Trusted UK Suppliers

    We work exclusively with vetted UK suppliers who specialize in Land Rover engines - no middlemen, no guesswork.

  • ✔ Save Up to 60% vs Dealership

    Why overpay? Compare quotes from multiple sellers & save up to 60% on Land Rover replacement engines, get top-tier quality for less.

  • ✔ Tested & Certified Engines

    Every Land Rover engine is thoroughly tested for durability and performance, backed by a 6-24 month warranty.

  • ✔ Fast Quotes & Faster Delivery

    Quick quotes, nationwide delivery, and optional vehicle recovery, get your Land Rover back on the road in no time.

  • ✔ Expert Land Rover Defender Support

    Need help? Our friendly Land Rover specialists guide you through engine compatibility, specs, and installation process.

  • ✔ AJ25 Engines Specialists

    From Freelander 2 to Jaguar XF, we offer all variants (150PS / 180PS / 190PS).

  • ✔ Performance Matched with Experience

    Our remanufactured and reconditioned engines often meet or exceed OEM specs - ready for serious off-road and on-road action.

  • ✔ We Work for You - Not the Suppliers

    We’re 100% on your side, helping you choose the best engine deal instead of just pushing supplier specials.

Tuning & Performance Upgrades


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Frequently Asked Questions - LAND ROVER AJ25 Diesel Engine

How much does a reconditioned LAND ROVER AJ25 engine cost in the UK?

A fully rebuilt LAND ROVER AJ25 engine typically costs between £2,400 and £4,100, depending on core condition, mileage, and warranty. Prices usually include 12-month unlimited-mileage cover and engine fitting options. Optional upgrades like injectors or turbos can raise the total.

What is the expected lifespan of a LAND ROVER AJ25 engine?

With regular servicing, the AJ25 can last 180,000 to 220,000 miles. Oil changes every 8,000-10,000 miles using 5W-30 C1 low SAPS oil, along with clean EGR and DPF systems, help maximise longevity.

What are known issues with the LAND ROVER AJ25 engine?

Common AJ25 faults include timing chain wear, EGR valve clogging, and DPF pressure sensor failure. These often emerge between 70,000-100,000 miles. Replacing the tensioner and using premium diesel can reduce long-term issues.

Can I remap or tune a LAND ROVER AJ25 safely?

Yes, stage 1 ECU remaps are generally safe for the AJ25 if done by professionals using dyno-tested maps. Gains of +30-40bhp are typical, but DPF, clutch, and gearbox condition must be assessed beforehand. Always notify insurers of performance mods.

Which oil is best for a LAND ROVER AJ25 engine?

Use 5W-30 ACEA C1 fully synthetic oil meeting JLR STJLR.03.5005 spec. This low-SAPS oil protects the DPF and maintains camchain health. Change every 10,000 miles or 12 months, whichever comes first.

Is the LAND ROVER AJ25 the same as the TD4 or SD4 engine?

Yes - the AJ25 is part of the JLR Ingenium diesel family and is often marketed as TD4 (150PS) or SD4 (180PS) in different Land Rover and Jaguar trims. Despite different badges, they share the same base engine with varied ECU maps and turbos.

Can I install a LAND ROVER AJ25 engine into another model?

Engine swaps are possible but must match ECU, mounts, gearbox, and emissions specs. The AJ25 fits many Discovery Sport, Evoque, XF, XE trims, but retrofitting requires skilled labour and remapping. VIN compatibility and donor year are key factors.

How often should the timing chain be checked on the AJ25?

Land Rover doesn’t specify an exact interval, but the AJ25 timing chain should be inspected at 80,000-100,000 miles. Listen for rattles on cold start. Preventative replacement with OEM-grade kits helps avoid tensioner failure and valve damage.

Does the LAND ROVER AJ25 require AdBlue?

Yes, most post-2016 AJ25-powered models use AdBlue (DEF) for SCR emissions control. Expect a fill-up every 5,000-8,000 miles. Keep the tank topped to avoid limp mode and MOT emissions failures. A dashboard warning will alert when low.