How much does a Range Rover 4.2 SC engine replacement cost-

A complete rebuilt Range Rover 4.2 SC engine typically costs between £5,500 and £9,000 for supply only [ESTIMATED - using AJ133 5.0L V8 SC as proxy]. Used units start from around £2,500. Reconditioned units range from £4,000 to £6,500. Prices vary based on the specific AJ34S engine code and supplier.

What are the signs of timing chain failure in a Range Rover 4.2 SC-

Early warning signs of timing chain wear in the 4.2L supercharged 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 classic Range Rover 4.2 SC-

Yes, for well-maintained examples. The Range Rover 4.2 SC is a highly capable classic luxury SUV with current market values ranging from £4,000 to over £12,000 [THIRD-PARTY]. A rebuilt engine cost is a sensible fraction of the vehicle's total value if the chassis and electronics are solid. It preserves the car's heritage, performance, and resale value. Upgraded rebuilt units address known factory cooling and timing weaknesses.

How long does a Range Rover 4.2 SC engine supply and fit take-

A professional Range Rover 4.2 SC 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.

Do rebuilt 4.2 SC engines include upgraded supercharger and cooling components-

Yes, reputable specialists rebuilding a Range Rover 4.2 SC engine will address known weak points. Plastic coolant crossover pipes are replaced with updated components. Timing chain tensioners and supercharger isolator couplers are inspected and upgraded as standard. This ensures the engine remains reliable under the thermal stress of supercharged operation.

Range Rover 4.2 SC SPECIALISTS

Range Rover 4.2 SC Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK Range Rover 4.2 SC engine specialists. Compare prices on reconditioned, rebuilt and used engines to restore your L322's supercharged V8 performance and precision engineering.

Supply & Fit Available

12-Month Warranty

Nationwide Delivery

100+ Suppliers

Range Rover 4.2 SC Engine

from£5,500 to £9,000...

Usedfrom £2,500
Reconditionedfrom £4,000
Common codesAJ34S, AJ33S

Land Rover range-rover 4.2 SC Used Engine — AJ34S

Land Rover range-roverUsed Engine — AJ34S

Land Rover range-rover 4.2 SC Reconditioned Engine — AJ34S

Land Rover range-roverReconditioned Engine — AJ34S

Land Rover range-rover 4.2 SC Rebuilt Engine — AJ34S

Land Rover range-roverRebuilt Engine — AJ34S

Instant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide Network

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

Range Rover 4.2 SC Engine History & Specs at a Glance

Launched as the performance flagship of the facelifted L322 generation, the Range Rover 4.2 SC paired luxurious refinement with a potent supercharged V8, offering a significant power upgrade over the naturally aspirated 4.4L models.

2005
AJ34S (4.2L V8 Supercharged), 390hp, introduced in the L322 facelift, featuring an Eaton supercharger and revised engine management.
2006
Minor calibration updates for improved throttle response and emissions compliance, maintaining the 390hp output.
2009
Production of the 4.2 SC ceased, replaced by the new 5.0L Supercharged (AJ133) V8 in the subsequent L322 update and L405 generation.

Every engine fitted to the Range Rover 4.2 SC is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Range Rover 4.2 SC Engine Codes Specifications & Replacement Cost

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

AJ34S — 4.2L Petrol Supercharged (2005-2009)

Power Output: 390hp
Years Fitted: 2005-2009

Can’t find your exact engine code?-> Get quotes for AJ34S Range Rover 4.2 SC engine replacement

-> Get quotes for AJ34S Range Rover 4.2 SC engine replacement

Common failure points and repair options

Timing Chain Tensioner & Supercharger Wear

Affected: Range Rover 4.2 SC (AJ34S, 2005-2009)
Typical failure mileage: 60,000-120,000 miles

Root cause

The supercharged AJ-V8 family is susceptible to timing chain tensioner fatigue and supercharger isolator coupler wear 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 & Coupler Kit Replacement	£3,500-£5,500	£2,500-£4,000
Full Replacement - rebuilt/reconditioned engine	£8,000-£12,000	£5,500-£9,000 [ESTIMATED - using AJ133 5.0L V8 SC as proxy]

Our recommendation

If caught early, a specialist timing chain and supercharger coupler service is the most cost-effective route. However, if the engine has suffered catastrophic failure due to neglected chain wear or overheating, investing in a fully rebuilt unit with upgraded components is the only way to guarantee long-term reliability for this classic SUV.

-> Compare rebuilt AJ34S Range Rover 4.2 SC engine prices

Cooling System & Coolant Crossover Leaks

Affected: Range Rover 4.2 SC (AJ34S, 2005-2009)
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	£8,000-£12,000	£5,500-£9,000 [ESTIMATED - using AJ133 5.0L V8 SC as proxy]

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 AJ34S Range Rover 4.2 SC engine prices

Don't Let Engine Failure Write Off Your Range Rover 4.2 SC

Protect your classic investment with a fully rebuilt Range Rover 4.2 SC 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 Range Rover 4.2 SC Engine Replacement Prices Now ->

FAQ

Range Rover 4.2 SC Engine ReplacementFrequently Asked Questions

Everything Range Rover 4.2 SC owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Yes, for well-maintained examples. The Range Rover 4.2 SC is a highly capable classic luxury SUV with current market values ranging from £4,000 to over £12,000 [THIRD-PARTY].

A rebuilt engine cost is a sensible fraction of the vehicle's total value if the chassis and electronics are solid.
It preserves the car's heritage, performance, and resale value.
Upgraded rebuilt units address known factory cooling and timing weaknesses.

-> Secure your investment with a rebuilt Range Rover 4.2 SC engine.

Yes, reputable specialists rebuilding a Range Rover 4.2 SC engine will address known weak points.

Plastic coolant crossover pipes are replaced with updated components.
Timing chain tensioners and supercharger isolator couplers are inspected and upgraded as standard.
This ensures the engine remains reliable under the thermal stress of supercharged operation.

-> Enter your registration to confirm component upgrades for your Range Rover 4.2 SC.

Why Choose Us

Compare Range Rover 4.2 SC Engine Prices Today

Comparing quotes for your Range Rover 4.2 SC is completely free and carries no obligation. By entering your registration, you ensure that every quote you receive is precisely matched to your specific AJ34S engine code, guaranteeing compatibility and peace of mind from vetted UK premium Land Rover specialists.

100+100+ Range Rover 4.2 SC engines supplied through our network

12-Month12-Month Warranty on every rebuilt Range Rover 4.2 SC engine

NationwideNationwide UK delivery

Get Free Range Rover 4.2 SC Engine Quotes ->

Compare quotes from trusted UK Range Rover 4.2 SC engine specialists with warranty-backed rebuilt, reconditioned and used options nationwide.