Land Rover Defender 90 Works V8 Engine ReplacementCompare Prices & Get Quotes
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.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £8,000 to £12,000 [EM-QUOTE]
Used from £3,000 · Reconditioned from £5,500 · Common codes: AJ133, 508PN
From £3,000
Tested, bare/short engine
From £5,500
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
Secure enquiry - no spam, no pressure. Genuine quotes only from vetted UK Land Rover Defender 90 Works V8 specialists.
3 Simple Steps3 Simple Stepsto Finding the Best Land Rover Defender 90 Works V8 Replacement Engineto Finding the Best Land Rover Defender 90 Works V8 Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryLand 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.
Variant HistoryLand 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.
Land Rover Defender 90 Works V8
Fuel TypePetrol
Engine Size Range5.0L
Power Output Range400-525hp across the variant's historyEngine History Timeline
508PN (5.0L V8 Naturally Aspirated) 400hp, launched as the Defender Works V8 70th Edition (L316 chassis).
508PN (5.0L V8 Naturally Aspirated) 405hp, continued in the limited-run Defender Works V8 Trophy edition.
AJ133 (5.0L V8 Supercharged) 525hp, introduced in the new-generation L663 Defender 90 V8 and Works V8 editions.
Key Specs Snapshot
Fuel TypePetrolEngine Size Range5.0LPower Output Range400-525hp across the variant's historyYears Produced2018-presentEvery engine fitted to the Land Rover Defender 90 Works V8 is covered below, with UK rebuilt pricing and known failure points.
Land Rover Defender 90 Works V8 Engine Codes - Specifications & Replacement CostLand Rover Defender 90 Works V8 Engine Codes - Specifications & Replacement Cost
5.0L Petrol (2018-2021)
Power Output400-405hpYears Fitted2018-2021
Compatible Trim Levels
- Defender 90 Works V8 70th Edition
- Defender 90 Works V8 Trophy
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£3,000-£5,500
Reconditioned
Addressed known issues, tested
£5,500-£9,000
Rebuilt
Full teardown, upgraded internals
£8,000-£12,000
Common Failure
Timing chain tensioner wear and coolant leaks from crossover pipes are documented patterns in the 5.0L V8 family, typically emerging between 60,000-120,000 miles.
The 5.0L V8 in the Land Rover Defender 90 Works V8 is a high-performance unit that demands precise maintenance. While robust when cared for, known issues like timing chain wear and coolant system leaks can escalate. Rebuilt engines through EnginesMarket include upgraded components addressing these original failure points, backed by a minimum 12-month unlimited-mileage warranty.
Why the Land Rover Defender 90 Works V8 5.0L V8 Requires Attention
Affected Vehicles
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.
Why It Happens
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.
Dealer (parts + labour)
£300-£600
Specialist (parts + labour)
£200-£400
What it involves
Endoscope inspection of chain tensioner and guides
Suitability
Recommended at 60k miles to catch early wear
1 - 2 daysDealer (parts + labour)
£3,500-£5,500
Specialist (parts + labour)
£2,500-£4,500
What it involves
Full chain, tensioner, and guide replacement
Suitability
Viable if the engine block and internals are undamaged
1 - 2 daysDealer (parts + labour)
£10,000-£14,000
Specialist (parts + labour)
£8,000-£12,000 [EM-QUOTE]
What it involves
Supply & fit of a rebuilt 5.0L V8 with upgraded tensioner components and 12-month warranty
Suitability
The right call if catastrophic failure has occurred or the block is compromised
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Preventative Inspection Minor | £300-£600 | £200-£400 | Endoscope inspection of chain tensioner and guides | Recommended at 60k miles to catch early wear | 1 - 2 days |
 Timing Chain Kit Replacement Best Value | £3,500-£5,500 | £2,500-£4,500 | Full chain, tensioner, and guide replacement | Viable if the engine block and internals are undamaged | 1 - 2 days |
Full Replacement - rebuilt/reconditioned engine Best Value | £10,000-£14,000 | £8,000-£12,000 [EM-QUOTE] | Supply & fit of a rebuilt 5.0L V8 with upgraded tensioner components and 12-month warranty | The right call if catastrophic failure has occurred or the block is compromised | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical Land Rover Defender 90 Works V8 holds a current UK market value of £80,000-£130,000+ depending on edition and mileage [THIRD-PARTY]. At this valuation, a rebuilt engine replacement cost represents a small fraction of the vehicle's total value, making professional replacement highly viable to preserve its collector status.
Our Recommendation
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.
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.
Compare rebuilt 508PN Land Rover Defender 90 Works V8 engine prices
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
"All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific Land Rover Defender 90 Works V8. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Land Rover Defender 90 Works V8 Engine ReplacementFrequently Asked Questions
Question 1How 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.
Question 2What 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.
Question 3Is 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.
Question 4How 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.
Question 5What 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.
Why Choose UsCompare Land Rover Defender 90 Works V8Engine PricesToday
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