How much does a Land Rover Defender 90 Works V8 engine replacement cost-

A complete rebuilt Land Rover Defender 90 Works V8 engine typically costs between £8,000 and £12,000 for supply only [EM-QUOTE]. Used units start from around £3,000. Reconditioned units range from £5,500 to £9,000. Prices vary based on the specific engine code (508PN or AJ133) and supplier.

What are the signs of timing chain failure in a Land Rover Defender 90 Works V8-

Early warning signs of timing chain wear in the 5.0L V8 include a distinct rattling noise from the engine bay during cold starts. Check engine light or camshaft correlation fault codes. Rough idling or slight loss of performance. Metallic debris in the engine oil.

Is it worth replacing the engine in a Land Rover Defender 90 Works V8-

Yes, absolutely. The Land Rover Defender 90 Works V8 is a highly collectible vehicle with current market values ranging from £80,000 to over £130,000 [THIRD-PARTY]. A rebuilt engine cost is a small fraction of the vehicle's total value. It preserves the car's heritage, performance, and resale value. Upgraded rebuilt units address known factory weaknesses.

How long does a Land Rover Defender 90 Works V8 engine supply and fit take-

A professional Land Rover Defender 90 Works V8 engine replacement typically takes 3 to 5 working days. Removal and preparation of the old unit takes 1-2 days. Fitting, calibration, and testing of the new rebuilt engine takes 2-3 days. Nationwide collection and delivery are arranged by the specialist.

What is the difference between the 508PN and AJ133 engines in the Defender 90 Works V8-

The 508PN is the naturally aspirated 5.0L V8 (400-405hp) used in the classic L316 Works V8 editions (2018-2021). The AJ133 is the supercharged 5.0L V8 (525hp) introduced in the newer L663 Defender 90 V8 and Works V8 models (2022-present). Both share similar underlying architecture but have different forced-induction components and tuning.

Land Rover Defender 90 Works V8 SPECIALISTS

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Get quotes today from trusted UK Land Rover Defender 90 Works V8 engine specialists. Compare prices on reconditioned, rebuilt and used engines to protect your collector investment and restore peak V8 performance.

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Land Rover Defender 90 Works V8 Engine

from£8,000 to £12,00...

Usedfrom £3,000
Reconditionedfrom £5,500
Common codesAJ133, 508PN

Land Rover defender 90 Works V8 Used Engine — 508PN

Land Rover defenderUsed Engine — 508PN

Land Rover defender 90 Works V8 Reconditioned Engine — 508PN

Land Rover defenderReconditioned Engine — 508PN

Land Rover defender 90 Works V8 Rebuilt Engine — 508PN

Land Rover defenderRebuilt Engine — 508PN

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How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

Land Rover Defender 90 Works V8 Engine History & Specs at a Glance

Launched as a limited-edition celebration of Land Rover’s heritage, the Defender 90 Works V8 packs the iconic 5.0-litre JLR V8 into the classic short-wheelbase chassis, offering a unique blend of raw performance and off-road capability.

2018
508PN (5.0L V8 Naturally Aspirated), 400hp, launched as the Defender Works V8 70th Edition (L316 chassis).
2021
508PN (5.0L V8 Naturally Aspirated), 405hp, continued in the limited-run Defender Works V8 Trophy edition.
2022
AJ133 (5.0L V8 Supercharged), 525hp, introduced in the new-generation L663 Defender 90 V8 and Works V8 editions.

Every engine fitted to the Land Rover Defender 90 Works V8 is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Land Rover Defender 90 Works V8 Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

508PN — 5.0L Petrol (2018-2021)

Power Output: 400-405hp
Years Fitted: 2018-2021

Can’t find your exact engine code?-> Get quotes for 508PN Land Rover Defender 90 Works V8 engine replacement

-> Get quotes for 508PN Land Rover Defender 90 Works V8 engine replacement

Common failure points and repair options

Timing Chain Tensioner Wear

Affected: Land Rover Defender 90 Works V8 (508PN / AJ133, 2018-present)
Typical failure mileage: 60,000-120,000 miles

Root cause

The rear-mounted timing chain design in the JLR 5.0L V8 family is susceptible to tensioner fatigue and chain stretch over time, which can lead to rattling on cold starts and, if ignored, catastrophic internal damage.

Repair options

Repair tier	Dealer price	Specialist price
Preventative Inspection	£300-£600	£200-£400
Timing Chain Kit Replacement	£3,500-£5,500	£2,500-£4,500
Full Replacement - rebuilt/reconditioned engine	£10,000-£14,000	£8,000-£12,000 [EM-QUOTE]

Our recommendation

If caught early, a preventative timing chain kit replacement by a JLR specialist is the most cost-effective route. However, if the engine has suffered catastrophic failure due to neglected chain wear, investing in a fully rebuilt unit with upgraded components is the only way to protect the long-term value and reliability of your Works V8.

-> Compare rebuilt 508PN Land Rover Defender 90 Works V8 engine prices

Coolant Leaks from Crossover Pipes

Affected: Land Rover Defender 90 Works V8 (508PN / AJ133, 2018-present)
Typical failure mileage: 60,000-120,000 miles

Root cause

Plastic coolant crossover pipes and expansion tanks in the V8 valley are prone to becoming brittle and cracking under repeated heat cycles, leading to coolant loss and potential overheating.

Repair options

Repair tier	Dealer price	Specialist price
Coolant System Repair	£800-£1,500	£500-£900
Full Replacement - rebuilt/reconditioned engine	£10,000-£14,000	£8,000-£12,000 [EM-QUOTE]

Our recommendation

Proactive replacement of the plastic coolant crossover pipes and expansion tank with updated parts is a highly recommended, low-cost preventative measure. If overheating has already warped the cylinder heads, a full rebuilt engine replacement is the safest and most reliable solution.

-> Compare rebuilt AJ133 Land Rover Defender 90 Works V8 engine prices

Don't Let Engine Failure Write Off Your Land Rover Defender 90 Works V8

Protect your investment with a fully rebuilt Land Rover Defender 90 Works V8 engine. Our network supplies units with upgraded components that address known failure points, backed by a minimum 12-month unlimited-mileage warranty and nationwide delivery. Avoid main dealer premiums by comparing transparent, itemised quotes from vetted UK specialists today.

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FAQ

Land Rover Defender 90 Works V8 Engine ReplacementFrequently Asked Questions

Everything Land Rover Defender 90 Works V8 owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Yes, absolutely. The Land Rover Defender 90 Works V8 is a highly collectible vehicle with current market values ranging from £80,000 to over £130,000 [THIRD-PARTY].

A rebuilt engine cost is a small fraction of the vehicle's total value.
It preserves the car's heritage, performance, and resale value.
Upgraded rebuilt units address known factory weaknesses.

-> Secure your investment with a rebuilt Land Rover Defender 90 Works V8 engine.

The 508PN is the naturally aspirated 5.0L V8 (400-405hp) used in the classic L316 Works V8 editions (2018-2021).

The AJ133 is the supercharged 5.0L V8 (525hp) introduced in the newer L663 Defender 90 V8 and Works V8 models (2022-present).
Both share similar underlying architecture but have different forced-induction components and tuning.

-> Enter your registration to confirm which 5.0L V8 variant is fitted to your Land Rover Defender 90 Works V8.

Why Choose Us

Compare Land Rover Defender 90 Works V8 Engine Prices Today

Comparing quotes for your Land Rover Defender 90 Works V8 is completely free and carries no obligation. By entering your registration, you ensure that every quote you receive is precisely matched to your specific 5.0L V8 engine code, guaranteeing compatibility and peace of mind from vetted UK specialists.

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