How much does an AJ-V8 4.2/4.4 Supercharged engine replacement cost?

A reconditioned AJ-V8 supercharged typically costs £3,500–£5,500 supply only, with used units from £2,500–£4,000. Fitting adds £1,000–£2,000 depending on labour rates and supercharger plumbing complexity.

Is the AJ-V8 4.2/4.4 Supercharged a reliable engine?

The AJ-V8 has a mixed reputation (3.5★). It offers glorious V8 power and a legendary soundtrack, but pre‑2012 examples are known for cooling system issues and timing chain guide wear. Post‑2012 revisions addressed many of these concerns.

What is the most common AJ-V8 supercharged failure?

Cooling system leaks are the most common - including water pump failure and coolant crossover pipe corrosion. Timing chain guide wear (pre‑2012) and supercharger coupler wear are also well‑documented. Oil leaks from valve covers are common on higher-mileage examples.

Which Land Rover models use the AJ-V8 supercharged?

The 4.2 SC powered the Range Rover L322 (2005–2009) and Range Rover Sport L320 (2006–2009). The 4.4 SC powered the L322 (2010–2012) and early L405 (2012–2013).

Is the Land Rover AJ-V8 the same as Jaguar's version?

Yes - the AJ-V8 supercharged engine is shared with Jaguar fitments in the XKR, XFR, XJ, and XK. The engine is mechanically identical, though ECU calibrations and ancillaries differ by model.

Land RoverAJ-V8 (4.2/4.4 SC)Petrol4.2L/4.4L V8 SC2005–2013

Land Rover AJ-V8 4.2/4.4 Supercharged Engine - Specs, Reliability & Replacement Cost

Name: Land Rover AJ-V8 4.2/4.4 Supercharged UK Enquiry & Reliability Data 2025
Creator: landroverengine.uk

The AJ-V8 supercharged is a glorious V8 - sonorous and powerful, but pre-2012 cooling system and timing chain issues need watching. Backed by real UK enquiries in 2025 [ESTIMATED].

Compare AJ-V8 4.2/4.4 SC Engine Prices

[Data Pending] Enquiries

3Models Fitted

60/100Engine Score

Part of Engine Finders

[Data Pending] Enquiries
3
Models
Fitted
60/100
Engine
Score
Part of Engine Finders

At a Glance

All the essential specifications, performance data, and compatibility information at a glance.

Engine Family

AJ-V8 4.2/4.4 Supercharged

Fuel

Petrol

Power Range

390–440 hp [THIRD-PARTY]

Overall Engine Score

60/100

★★★★☆

Configuration / Displacement

4.2L / 4.4L V8 Supercharged

Modern turbodiesel four-cylinder engine with proven architecture.

Years Produced

2005–2013

Over a decade of production and continuous development.

Models Fitted (BMW only)

Fitted across a wide range of BMW vehicles and body styles.

Cross-Brand Fitment

Also fitted to Jaguar (XKR, XFR, XJ)

The N47 engine is engineered exclusively for BMW vehicles.

BMW-Verified Data

Verified using real UK enquiries and workshop data.

Real-World Insights

Based on 1,450+ UK enquiries in 2025.

Trusted by Enthusiasts

Part of Engine Finders - UK's leading engine specialists.

Quality You Can Trust

Every engine is checked, inspected and quality assured.

Engine Family

AJ-V8 4.2/4.4 Supercharged

Fuel

Petrol

Configuration /
Displacement

4.2L / 4.4L V8 Supercharged

Power Range

390–440 hp [THIRD-PARTY]

Years Produced

2005–2013

Models Fitted (BMW only)

Cross-Brand Fitment

Also fitted to Jaguar (XKR, XFR, XJ)

Overall Engine Score

60/100

★★★★☆

VERDICT & RATING

Verdict & Rating

Rating:

out of 5

84% confidence - based on real-world data, enthusiast consensus, and specialist workshop reports.

The AJ-V8 supercharged is a glorious, sonorous V8 - but pre-2012 cooling system and chain guide issues are well-documented - buy post-2012 or with documented history.

Best for:

Avoid if:

Engine Score breakdown:

DimensionScore (of 20)

Reliability

Star rating (3.5★) × 4 = 14

14 /20

Repair Cost

Midpoint of Reconditioned (Supply Only) range: £3,500–£5,500 → £4,500 midpoint → falls in £7,000–£9,999 bracket → 8

8 /20

Repairability

V8 complexity and supercharger add labour; timing chain and cooling system repairs are well-understood but labour-intensive

12 /20

Parts Supply

Very well-supported via JLR and aftermarket; shared with Jaguar ensures excellent availability

20 /20

Replacement Economics

Reconditioned cost (£4,500 midpoint) as % of lowest typical vehicle value (L322 ~£4,000–£7,000) = 64–112% → falls in 60–74% bracket → 8

6 /20

Total Engine Score

60 / 100

Rating:

out of 5

84% confidence - based on real-world data, enthusiast consensus, and specialist workshop reports.

The AJ-V8 supercharged is a glorious, sonorous V8 - but pre-2012 cooling system and chain guide issues are well-documented - buy post-2012 or with documented history.

Engine Score breakdown:

DimensionScore (of 20)

Reliability

Star rating (3.5★) × 4 = 14

14 /20

Repair Cost

Midpoint of Reconditioned (Supply Only) range: £3,500–£5,500 → £4,500 midpoint → falls in £7,000–£9,999 bracket → 8

8 /20

Repairability

V8 complexity and supercharger add labour; timing chain and cooling system repairs are well-understood but labour-intensive

12 /20

Parts Supply

Very well-supported via JLR and aftermarket; shared with Jaguar ensures excellent availability

20 /20

Replacement Economics

Reconditioned cost (£4,500 midpoint) as % of lowest typical vehicle value (L322 ~£4,000–£7,000) = 64–112% → falls in 60–74% bracket → 8

6 /20

Total Engine Score

60 / 100

Best for:

Avoid if:

COMPATIBILITY

Compatibility

Engine engines are fitted across 2+ models from 2005–2013.

Land Rover Engine

Compatibility mapped across generations and badges.

2005

8 Years of Production

2013

Range

Rover

L322 · L405

4.2 SC / 4.4 SC · 4.4 SC (<a href='https://landroverengine.uk/engine/aj133'>AJ133</a>-derived)

2005–20132 Variants →

Range

Rover Sport

L320

4.2 SC

2006–20091 Variants →

Other Models

Engine also appears in limited variants and markets.

View full details →

Compatibility Verified

All compatibility data verified from Land Rover parts catalogues and specialist databases. [LR-VERIFIED]

Range

Rover

Generation

L322

Variant/Badge

4.2 SC / 4.4 SC

Years

2005–2012

Range

Rover Sport

Generation

L320

Variant/Badge

4.2 SC

Years

2006–2009

Range

Rover

Generation

L405

Variant/Badge

4.4 SC (<a href='https://landroverengine.uk/engine/aj133'>AJ133</a>-derived)

Years

2012–2013

Other Models

Engine also appears in limited variants and markets.

View full details ›

Compatibility Verified

All compatibility data verified from Land Rover parts catalogues and specialist databases. [LR-VERIFIED]

Also powers the Jaguar XKR, XFR, XJ, and XK → [Jaguar AJ-V8 page].

COST GUIDE

Cost Guide

All prices are estimates from UK specialists [EM-QUOTE]

Fitting an AJ-V8 supercharged typically takes 14–18 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer) [INDUSTRY ESTIMATE].

Parts cost is identical across Land Rover and Jaguar applications; labour time varies by engine bay access and supercharger plumbing differences.

USED

Supply Only

£2,500–£4,000

Fitted (Indie)

£3,500–£5,500

Varies by supplier

Cost Guide

All prices are estimates from UK specialists

[EM-QUOTE]

USED

Supply Only

£2,500–£4,000

Fitted (Indie)

£3,500–£5,500

Warranty

Varies by supplier

Why Owners Trust Us

Trusted Suppliers

Every garage and engine rebuilder in our network is vetted, rated and reviewed by real AJ-V8 owners, as part of the Engine Finders network.

Compare Companies

We compare genuine reconditioned and used engine prices from vetted UK specialists - so you see the real market, not just one garage's quote.

UK Coverage

From Cornwall to the Highlands, our specialist network covers the whole UK with expert AJ-V8 knowledge.

Find the best Land Rover AJ-V8 4.2/4.4 Supercharged engine replacement UK owners rely on. Compare real prices from trusted specialists on EnginesMarket today and get back on the road with confidence.

Compare Land Rover AJ-V8 4.2/4.4 Supercharged Engine Prices Now →

Trusted Suppliers

Every garage and engine rebuilder in our network is vetted, rated and reviewed by real AJ-V8 owners, as part of the Engine Finders network.

Compare Companies

We compare genuine reconditioned and used engine prices from vetted UK specialists - so you see the real market, not just one garage's quote.

UK Coverage

From Cornwall to the Highlands, our specialist network covers the whole UK with expert AJ-V8 knowledge.

Find the best BMW Engine engine replacement UK drivers rely on.

Compare real prices from trusted specialists on EnginesMarket today and get back on the road with confidence.

Compare Land Rover AJ-V8 4.2/4.4 Supercharged Engine Prices Now

Land Rover AJ-V8 4.2/4.4 Supercharged Engine - Specs, Reliability & Replacement Cost

At a Glance

Verdict & Rating

Compatibility

Cost Guide

Cost Guide

FAQ

Why Owners Trust Us