The XJ8 was a key part of Jaguar's XJ range through the late 1990s and 2000s, offering V8 power in a more accessible package than the supercharged XJR. It used the naturally aspirated AJ-V8 engine across two generations — the X308 (1997–2003) and the X350 (2002–2009) — with capacities ranging from 3.2 litres to 4.0 litres depending on the market and specification. The AJ-V8 was Jaguar's first all-new V8 design, and while it's a robust engine overall, timing chain components and valve seals are common service items at higher mileage. The XJ8 is no longer in production, but we continue to rebuild and replace engines for every one still on the road. Jaguar XJ8 Engine Codes AJ-V8 (X308, X350) A naturally aspirated V8 fitted to the XJ8 from 1997 to 2009 across two generations. The X308 generation used the 3.2-litre and 4.0-litre versions of the AJ-V8, while the later X350 generation continued with the 4.0-litre AJ-V8 before being replaced by the 4.2-litre unit in some markets. We replace timing chains, tensioners, valve seals and gaskets as standard on every AJ-V8 rebuild. Check Your AJ-V8 XJ8 → [link to quote form] Jaguar XJ8 Engine Compatibility The XJ8 spans two chassis generations with the same engine family, but there are differences between early and later AJ-V8 units. Before we quote or supply anything, we confirm: Your exact engine code via registration or VIN Your generation (X308 or X350) Your engine capacity (3.2L or 4.0L) Any ancillary or ECU variations specific to your exact build This is why we always start with your registration rather than a generic XJ8 quote — it protects you from paying for parts that don't fit your actual car. Jaguar XJ8 Applications by Generation Generation Chassis Years Engine Code Fuel X308 X308 1997–2003 AJ-V8 (3.2L/4.0L) Petrol X350 X350 2002–2009 AJ-V8 (4.0L) Petrol Jaguar XJ8 Engines by Year Year Generation Engine Code Fuel Service 1997 X308 AJ-V8 Petrol Rebuild / Replacement 1998 X308 AJ-V8 Petrol Rebuild / Replacement 1999 X308 AJ-V8 Petrol Rebuild / Replacement 2000 X308 AJ-V8 Petrol Rebuild / Replacement 2001 X308 AJ-V8 Petrol Rebuild / Replacement 2002 X308/X350 AJ-V8 Petrol Rebuild / Replacement 2003 X308/X350 AJ-V8 Petrol Rebuild / Replacement 2004 X350 AJ-V8 Petrol Rebuild / Replacement 2005 X350 AJ-V8 Petrol Rebuild / Replacement 2006 X350 AJ-V8 Petrol Rebuild / Replacement 2007 X350 AJ-V8 Petrol Rebuild / Replacement 2008 X350 AJ-V8 Petrol Rebuild / Replacement 2009 X350 AJ-V8 Petrol Rebuild / Replacement 2002 and 2003 were transition years between the X308 and X350 generations — if your registration falls in either, we'll confirm your exact specification before quoting. We Cover Every Jaguar XJ8 Model Year: ✓ Jaguar XJ8 1999 Engine Rebuild ✓ Jaguar XJ8 2002 Engine Rebuild ✓ Jaguar XJ8 2005 Engine Rebuild ✓ Jaguar XJ8 2007 Engine Rebuild ✓ Jaguar XJ8 2009 Engine Rebuild If your registration year isn't listed above, get in touch — we'll confirm availability directly against your reg. Jaguar XJ8 Engine Sizes ✓ Jaguar XJ8 3.2 Litre Engine (AJ-V8) ✓ Jaguar XJ8 4.0 Litre Engine (AJ-V8) Jaguar XJ8 Fuel Types ✓ Jaguar XJ8 Petrol Engine Rebuilds Jaguar XJ8 Engine Costs A Jaguar XJ8 engine rebuild starts from £4,500. A full replacement engine and fitting service is also available. Exact pricing depends on the condition of your existing engine and the parts required — submit your registration for a fixed-price quote within 30 minutes. Related Jaguar XJ Variants Looking for a different XJ engine? We also cover: [Jaguar XJ6 Engine →] · [Jaguar XJR Engine →] · [Jaguar XJ Super V8 Engine →] · [Jaguar XJ 3.0d Engine →] · [Jaguar XJ 3.0 V6 Supercharged Engine →] · [Jaguar XJ 5.0 V8 Engine →] · [Jaguar XJ 5.0 V8 Supercharged Engine →] [← View All Jaguar XJ Engines] Frequently Asked Questions What engine does the Jaguar XJ8 use? The XJ8 uses the naturally aspirated AJ-V8 engine, available in 3.2-litre and 4.0-litre capacities across the X308 (1997–2003) and X350 (2002–2009) generations. How much does a Jaguar XJ8 engine rebuild cost? Rebuilds start from £4,500. Exact price depends on condition and parts required — submit your reg for a fixed-price quote. Which engine code is fitted to my XJ8? Enter your registration on this page and we'll confirm your exact AJ-V8 specification before you're quoted anything. Do you rebuild AJ-V8 XJ8 engines? Yes. We replace timing chains, tensioners, valve seals and gaskets as standard on every AJ-V8 rebuild. Do you supply used XJ8 engines? Yes, in some cases a matched low-mileage used engine is the right option. Our team will advise honestly once we've matched your registration and understood your situation. Can you recover my XJ8 if the engine has failed? Yes — nationwide recovery is available from £70, and most vehicles are collected within a few hours of booking. How long does an XJ8 engine rebuild take? Most rebuilds are completed within 3-5 working days from the time your car arrives at our workshop. Is rebuilding better than fitting a used engine? For most XJ8 owners, yes. A rebuild removes the compatibility risk that comes with an unknown used unit's history, and comes with a 12-month unlimited-mileage warranty — often longer and more comprehensive than what a used engine supplier offers. <a name="quote-form"></a> Get Your Free Jaguar XJ8 Fixed-Price Quote [Quote Form: Registration Number | Postcode | Name | Phone | Email | Issue/Enquiry Type (dropdown: Engine Failure / Replacement Needed / General Enquiry) | Submit] Most quotes returned within 30 minutes during working hours. json { "@context": "https://schema.org", "@graph": [ { "@type": "Organization", "@id": "https://jaguargarage.uk#organization", "name": "Jaguar Garage", "url": "https://jaguargarage.uk", "email": "info@jaguargarage.uk", "telephone": "+44 01268 944 234", "sameAs": [ "https://facebook.com/jaguarrebuildgarageuk", "https://twitter.com/jaguarrebuildgarageuk", "https://instagram.com/jaguarrebuildgarageuk", "https://tiktok.com/@jaguarrebuildgarageuk" ] }, { "@type": "AutoRepair", "@id": "https://jaguargarage.uk#autorepair", "name": "Jaguar Garage – XJ8 Engine Rebuild Specialists", "url": "https://jaguargarage.uk/jaguar-xj8-engines", "telephone": "+44 01268 944 234", "email": "info@jaguargarage.uk", "priceRange": "£££", "address": { "@type": "PostalAddress", "streetAddress": "Unit A5 Windsor Road, Commercial Estate, Ramsden Heath", "addressLocality": "Billericay", "postalCode": "CM11 1QE", "addressCountry": "GB" }, "openingHours": "Mo-Fr 09:00-18:00, Sa 11:00-14:00", "areaServed": "GB", "parentOrganization": { "@id": "https://jaguargarage.uk#organization" }, "brand": { "@type": "Brand", "name": "Jaguar" } }, { "@type": "Service", "serviceType": "Jaguar XJ8 Engine Rebuild & Replacement", "provider": { "@type": "AutoRepair", "name": "Jaguar Garage" }, "areaServed": "GB", "offers": { "@type": "Offer", "priceCurrency": "GBP", "price": "4500", "description": "Jaguar XJ8 engine rebuild starting price, AJ-V8" } }, { "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "What engine does the Jaguar XJ8 use?", "acceptedAnswer": { "@type": "Answer", "text": "The XJ8 uses the naturally aspirated AJ-V8 engine, available in 3.2-litre and 4.0-litre capacities across the X308 (1997\u20132003) and X350 (2002\u20132009) generations." } }, { "@type": "Question", "name": "How much does a Jaguar XJ8 engine rebuild cost?", "acceptedAnswer": { "@type": "Answer", "text": "Rebuilds start from £4,500. 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We continue to rebuild and replace AJ-V8 (naturally aspirated) engines for every XJ8 on the road.