Land Rover 5.0 V8 Petrol Engine Repair
Specialist care for the naturally aspirated Discovery V8.
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Naturally Aspirated V8
Specialist AJ133 Support
A Different V8 To The Range Rover Supercharged Engine
This page covers the naturally aspirated 5.0 V8 petrol fitted to the Discovery 3 and Discovery 4, which is a different engine to the supercharged 5.0 V8 found in Range Rover and Range Rover Sport models. Confirming which one you have matters before booking any work.
Owners typically get in touch after noticing a knocking or ticking sound, or while comparing rebuild costs against the more common diesel options fitted to the same vehicles. We treat this petrol V8 on its own terms.
Land Rover 5.0 Engine Codes to Help You Find Your Vehicle
| Make | Model | Engine Code | Actual CC | Power kw / hp | Year Range | |
|---|---|---|---|---|---|---|
| Land Rover | Range Rover Vogue | 508PN | 4999 | 276 kw / 375 hp | 2009-continue | Get Quote |
| Land Rover | Range Rover Vogue | 508PS | 4999 | 375 kw / 510 hp | 2009-continue | Get Quote |
| Land Rover | Range Rover Sport | 508PN | 4999 | 276 kw / 375 hp | 2009-2013 | Get Quote |
| Land Rover | Range Rover Sport | 508PS | 4999 | 375 kw / 510 hp | 2009-2013 | Get Quote |
| Land Rover | Range Rover Sport SVR | AJ133 | 5000 | 429 kw / 575 hp | 2015-continue | Get Quote |
| Land Rover | Discovery 4 | 508PN | 4999 | 276 kw / 375 hp | 2009-2016 | Get Quote |
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Why Choose Us
Confidence Built On Focused AJ133 Experience
Specialist support for the Discovery's naturally aspirated petrol V8
Naturally Aspirated AJ133 Knowledge
Experienced specifically with the Discovery's petrol V8, not just its supercharged Range Rover relative.
Proven Cam Follower Parts
Upgraded cam followers fitted where they offer a genuine improvement over the original component.
Rebuild Standards Matched To The Engine
Work carried out with the same care this V8 would receive on a flagship model.
Warranty On Replacement Engines
Reconditioned and replacement units come with clearly explained warranty cover.
Individually Itemised Quotes
Every quote reflects your specific engine, fault and vehicle rather than a generic figure.
Straightforward Cost Guidance
We explain what genuinely drives the cost of a 5.0 V8 rebuild before you commit.
Naturally Aspirated AJ133 Repair And Rebuild
Cam follower wear is the fault most commonly associated with the AJ133 engine family, and it can occur on the naturally aspirated Discovery version as well as the supercharged variant, though generally less frequently given the lower mechanical load. Left unchecked, worn followers can send debris through the oil system and affect the camshaft.
Where cam follower wear is found, we look at fitting upgraded followers designed to resist the wear pattern responsible for the original failure, rather than simply refitting standard parts. This approach matters on any AJ133 rebuild, regardless of whether the engine is naturally aspirated or supercharged.
Many Discovery 3 and Discovery 4 owners are more familiar with the vehicle's diesel options, so this petrol V8 sometimes gets less routine attention than it should. We diagnose it with the same rigour, and we'll always explain honestly whether a repair, rebuild or replacement is the sensible route for your vehicle's condition and value.
- Diagnosis distinguishing cam follower, timing chain and oil system faults
- Upgraded cam follower parts fitted on rebuilds where appropriate
- Clear distinction from supercharged AJ133 diagnostic considerations
- Cost guidance weighed against your Discovery's overall value
- Transparent parts and labour breakdown before work begins
Engine Work For The Discovery's Petrol V8
Engine Work For The Discovery's Petrol V8
From a cam follower rebuild to a complete engine replacement, our workshop supports the naturally aspirated 5.0 V8.
Frequently Asked Questions
Everything you need to know about our Range Rover and Land Rover engine rebuild, replacement and repair services - answered by our JLR-trained specialists.
Request A Quote01Is the Land Rover Discovery 5.0 V8 petrol reliable?
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Is the Land Rover Discovery 5.0 V8 petrol reliable?
It can be dependable with attentive maintenance, and cam follower wear is generally less frequent here than on the supercharged Range Rover version due to lower mechanical load. Reliability still depends on service history and how quickly early symptoms are investigated.
02Is this the same engine as the Range Rover supercharged 5.0 V8?
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Is this the same engine as the Range Rover supercharged 5.0 V8?
It shares the same AJ133 engine family but is a naturally aspirated version without a supercharger, fitted to the Discovery 3 and Discovery 4. The two variants carry different loads and are covered as separate pages for that reason.
03What are common faults with the naturally aspirated AJ133?
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What are common faults with the naturally aspirated AJ133?
Cam follower wear is the main documented issue, sometimes leading to debris circulating through the oil system if left unresolved. Timing chain condition is also worth checking as part of any thorough diagnosis on this engine.
04Which Discovery models use the 5.0 V8 petrol engine?
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Which Discovery models use the 5.0 V8 petrol engine?
The naturally aspirated 5.0 V8 was fitted to the Discovery 3 and Discovery 4 as a petrol alternative to the more common diesel options. Confirming your exact vehicle and engine helps us give accurate diagnostic and cost advice.
05How much does it cost to rebuild a Discovery 5.0 V8?
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How much does it cost to rebuild a Discovery 5.0 V8?
Cost depends on the extent of cam follower or timing chain wear found during diagnosis, along with whether a targeted repair, rebuild or full replacement is appropriate. We assess each engine individually and provide a clear, itemised quote once diagnosis is complete.
06Should I repair or rebuild a worn AJ133 engine?
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Should I repair or rebuild a worn AJ133 engine?
This depends on what diagnosis finds and your vehicle's overall condition and value. Cam follower wear caught early can often be addressed without a full rebuild, while more extensive damage may call for a more comprehensive repair.
07Do reconditioned Discovery 5.0 V8 engines come with a warranty?
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Do reconditioned Discovery 5.0 V8 engines come with a warranty?
Yes, reconditioned and replacement engines are supplied with warranty cover. We'll confirm the specific terms for your engine and vehicle before any work is booked, so expectations are clear from the outset.
08What areas do you cover for Land Rover V8 engine work?
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What areas do you cover for Land Rover V8 engine work?
We're based in Grays, Essex, and regularly support customers across Essex, London and the wider South East, alongside UK-wide enquiries for engine supply and fitting. Contact us to confirm availability for your location.