Land RoverAJ20P6 / P400 (Ingenium 3.0 I6)Petrol3.0L I6 MHEV Turbo2019–present

Land Rover AJ20P6 (Ingenium 3.0 I6 Petrol / P400) Engine - Specs, Reliability & Replacement Cost

The AJ20P6 is JLR's modern straight-six petrol - smooth, powerful and efficient, but cooling system monitoring is essential. Backed by 160+ real UK enquiries in 2025 [EM-VERIFIED].

Compare AJ20P6 (Ingenium 3.0 I6 Petrol) Engine Prices
160+Enquiries
3Models Fitted
72/100Engine Score
Part of Engine Finders

At a Glance

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

Engine Family

AJ20P6 / P400 (Ingenium 3.0 I6 Petrol)

Fuel

Petrol

Configuration /
Displacement

3.0L I6 MHEV Turbo

Power Range

400 hp [THIRD-PARTY]

Years Produced

2019–present

Models Fitted (BMW only)

Cross-Brand Fitment

Also fitted to Jaguar (F-Pace, XF, XJ)

Overall Engine Score

72/100

★★★★☆

VERDICT & RATING

Verdict & Rating

Rating:

5

out of 5

82% confidence - based on 160+ real UK enquiries, specialist workshop reports, and JLR service data for this relatively new engine family.

The AJ20P6 is a refined, powerful modern straight-six petrol - cooling system vigilance is the key to longevity - buy with full JLR service history and enjoy the power.

Engine Score breakdown:

DimensionScore (of 20)

Reliability

Star rating (4.0★) × 4 = 16

16 /20

Repair Cost

Midpoint of Reconditioned (Supply Only) range: £4,500–£7,500 → £6,000 midpoint → falls in £5,000–£6,999 bracket → 12

12 /20

Repairability

Modern I6 with 48V MHEV adds complexity; repairs require specialist knowledge and diagnostic equipment

12 /20

Parts Supply

AJ20P6 parts availability improving but some components are JLR-specific; shared with Jaguar aids supply chain

12 /20

Replacement Economics

Reconditioned cost (£6,000 midpoint) as % of lowest typical vehicle value (Defender L663 ~£35,000+) = 17% → falls under 30% → 20

20 /20

Total Engine Score

72 / 100

Best for:

Avoid if:

COMPATIBILITY

Compatibility

Engine engines are fitted across 3+ models from 2020–2022.

Land Rover Engine

Compatibility mapped across generations and badges.

2020
2 Years of Production
2022

Range

Rover

Generation

L460

Variant/Badge

P400 (AJ20P6)

Years

2022–present

Range

Rover Sport

Generation

L461

Variant/Badge

P400 (AJ20P6)

Years

2022–present

Defender

Generation

L663

Variant/Badge

P400 (AJ20P6)

Years

2020–present

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 F-Pace, XF, and XJ → [Jaguar AJ20P6 page].

COST GUIDE

Cost Guide

All prices are estimates from UK specialists

[EM-QUOTE]

USED

Supply Only

£2,500–£4,500

Fitted (Indie)

£3,500–£5,900

Warranty

Varies by supplier
Most Popular

RECONDITIONED

Supply Only

£4,500–£7,500

Fitted (Indie)

£5,500–£9,000

Warranty

12 months typical

REBUILT

Supply Only

£6,500–£10,000

Fitted (Indie)

£7,500–£11,500

Warranty

12–24 months typical

Fitting an AJ20P6 typically takes 12–16 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer) [EM-QUOTE].

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

Compare AJ20P6 (Ingenium 3.0 I6 Petrol) engine prices from UK specialists

FAQ

FAQ

TRUST & PROOF

Why Owners Trust Us

Trusted Suppliers

Every garage and engine rebuilder in our network is vetted, rated and reviewed by real AJ20P6 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 AJ20P6 knowledge.