
Land Rover Discovery 5 L462 Engines — The Complete UK Guide
Every engine fitted to the Discovery 5 L462 — from the Ingenium 2.0-litre diesel four to the 3.0-litre supercharged V6 and the limited-run 5.0-litre SVX V8. Real UK costs, honest failure data, and the Ingenium timing-chain question that defines this generation's ownership experience. Backed by 292+ real UK Discovery 5 enquiries in 2025 [EM-VERIFIED].
Explore L462 EnginesLand Rover Discovery 5 L462 Engine Codes — The Complete Database
Every engine fitted to the Discovery 5 specifically — from launch in 2016 through the 2020 facelift and current mild-hybrid models.

Overview
Land Rover Discovery 5 L462 — Overview
The Discovery 5 L462 is the fifth generation of Land Rover's family SUV, launched in December 2016.
It abandoned the body-on-frame construction of the Discovery 3 and 4 for an aluminium unitary platform shared with the Range Rover L405 and Range Rover Sport L494, delivering a significantly lighter, more road-focused vehicle while retaining genuine off-road capability. The engine line-up spans 2.0-litre Ingenium four-cylinder diesels, a 3.0-litre V6 diesel, 2.0-litre and 3.0-litre petrol options, and a limited-run 5.0-litre supercharged V8 in the SVX. A 2020 facelift introduced mild-hybrid six-cylinder petrol engines (P360, P400).
Key Facts
Platform
Aluminium D7u (shared with Range Rover L405, Range Rover Sport L494)
Predecessor
Discovery 4 (L319)
Successor
Current model — on sale
Sibling body styles
None — L462 is sole Discovery 5 body style
Market Intelligence
The Discovery 5 L462 generated real UK engine enquiries in 2025, with the Ingenium 2.0-litre diesel (204DTD/204DTA) accounting for the largest share of the 1,150 JLR-wide figure, followed by the 3.0-litre V6 diesel (<a href='https://landroverengine.uk/engine/306dt'>306DT</a>) at 980 enquiries.
Best & Worst Engines

Best Diesel Overall
204DTA 2.0-litre Ingenium SD4 (241 bhp) — The higher-output Ingenium diesel delivers 241 bhp and 500 Nm of torque, making the L462 genuinely brisk despite its 2.2-tonne kerb weight. Later (post-2019) units benefit from revised timing-chain tensioners that address the pre-2019 failure risk.
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Who it's for: buyers who want diesel economy without the V6's fuel consumption.

Best Petrol Overall
PT204 2.0-litre Ingenium P300 — The 300 bhp four-cylinder petrol is the most reliable petrol in the L462 line-up. No turbocharger complexity beyond a single unit, no supercharger cooling system to manage, and a simpler overall architecture than the V6 and V8 options.
“”
Who it's for: buyers who want petrol reliability without the V6's fuel consumption.

Highest Risk
306DT 3.0-litre V6 Diesel — The AJD V6 diesel suffers from crankshaft bearing failure (tin-aluminium coating fatigue) at 80,000–140,000 miles, often preceded by cold-start knock. A bottom-end rebuild costs £5,500–£7,000; a full reconditioned replacement runs £6,500–£9,500.
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Who it's for: only buyers with full service history and a warranty.

Most Expensive Failure
AJ133 5.0-litre Supercharged V8 (SVX) — The limited-run SVX V8 is the most expensive engine in the L462 line-up to replace, with reconditioned units costing £5,500–£9,000 supply-only. Timing-chain guide wear is the primary risk, similar to other Jaguar-Land Rover V8s.
“”
Who it's for: collectors and enthusiasts who accept the premium.

Best Value
204DTA 2.0-litre Ingenium SD4 — The 241 bhp diesel four offers the best balance of performance, economy, and running costs. Post-2019 units are significantly more reliable than the V6 diesel, and the recon cost is substantially lower than the 306DT.
“”
Who it's for: the majority of Discovery 5 buyers.

Most Overlooked
PT306 (AJ20P6) 3.0-litre P360 MHEV — The mild-hybrid six-cylinder petrol, introduced with the 2020 facelift, delivers 360 bhp with significantly better fuel economy than the supercharged AJ126 it replaced. Too new for major failure patterns to have emerged.
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Who it's for: buyers who want six-cylinder petrol refinement without the AJ126's cooling-system concerns.

Land Rover Discovery 5 L462 — Ownership Economics
The L462 rule
A £6,500–£9,500 306DT recon against a £10,000–£14,000 early Discovery 5 sits at 46–95% of the car's value. On a sub-£12,000 L462, that brushes our 60% Land Rover threshold — we'll honestly tell you to walk away. Against a well-kept £18,000+ example, the same recon drops to a routine 36–53% — a repair decision, not a financial one. Value the car first.
Key Takeaways
Which L462 Costs Least To Own?
PT204 2.0-litre petrol — cheapest recon, simplest architecture.
Which L462 Costs Most To Own?
306DT V6 diesel — crankshaft bearing failure is catastrophic and expensive.
Which L462 Is Best Value?
204DTA 2.0-litre SD4 diesel — best balance of performance, economy, and running costs.
Common Problems

L462 Engine Replacement Costs — By Engine and Condition
Core Variants
Core Variants
Scope note: All variants listed are L462 Discovery 5 only. Engine fitment varies by year — the 2020 facelift introduced P360 and P400 mild-hybrid six-cylinder petrol units (PT306/306PS), while the SVX (AJ133 V8) was a limited-run model.
Market Intelligence
Most Requested E90 Engines (2025)
- 1.1. 204DTD/204DTA 2.0 Ingenium Diesel (1,150 JLR-wide enquiries)
- 2.2. 306DT 3.0 V6 Diesel (980)
- 3.3. AJ126 3.0 V6 Supercharged Petrol (560)
Most Requested E90 Variants
- 1.1. TD4 (2.0 diesel)
- 2.2. SD4 (2.0 high-output diesel)
- 3.3. TD6 (3.0 V6 diesel)
Average E90 Replacement Cost
£1,500–£9,500 supply-only [EM-QUOTE]
Most Common E90 Failures
- 1.1. Ingenium 2.0 diesel timing chain tensioner
- 2.2. 306DT V6 diesel crankshaft bearing failure
- 3.3. AJ126 V6 petrol cooling system leaks

Land Rover Discovery 5 TD4 (204DTD)
5
enquiries

Land Rover Discovery 5 TD6 (306DT)
3
enquiries

Land Rover Discovery 5 Si6 (AJ126)
2
enquiries
FAQ

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