The XK8 was Jaguar's V8 grand tourer, launched in 1996 and produced through to 2006. The XK8 specifically uses the 4.0-litre AJ-V8 family — the AJ26 from 1996 to 1999, and the AJ27 from 1999 to 2006 — both naturally aspirated petrol V8s. The AJ27 was an evolution of the AJ26, bringing improvements to the engine management and some internal components, but both engines share the same basic architecture and the same known wear pattern around the timing chain tensioners. The XK8 is no longer in production, but we continue to rebuild and replace engines for every one still on the road. Jaguar XK8 Engine Codes AJ26 A 4.0-litre V8 fitted to the XK8 from 1996 to 1999 (X100). Known for timing chain tensioner wear — see the callout above. We replace the timing chain, tensioners, and guides as standard on every AJ26 rebuild. Check Your AJ26 XK8 → [link to quote form] AJ27 A 4.0-litre V8 fitted to the XK8 from 1999 to 2006 (X100). The later evolution of the AJ26, it shares the same known pattern around timing chain tensioner wear. We replace the timing chain, tensioners, and guides as standard on every AJ27 rebuild. Check Your AJ27 XK8 → [link to quote form] Jaguar XK8 Engine Compatibility The XK8's AJ26 and AJ27 engines are both 4.0-litre V8s, and they share most major dimensions and ancillaries, but there are differences in engine management and some internal components that mean the two are not fully interchangeable. Before we quote or supply anything, we confirm: - Your exact engine code (AJ26 or AJ27) via registration or VIN - Your generation (X100) - Drivetrain and ancillary specification - Any electronics or ECU considerations specific to your exact build This is why we always start with your registration rather than a generic XK8 quote — it protects you from paying for parts that don't fit your actual car. Jaguar XK8 Applications by Generation Generation Chassis Years Engine Code Fuel X100 X100 1996–2006 AJ26/AJ27 Petrol Jaguar XK8 Engines by Year Year Generation Engine Code Fuel Service 1996 X100 AJ26 Petrol Rebuild / Replacement 1997 X100 AJ26 Petrol Rebuild / Replacement 1998 X100 AJ26 Petrol Rebuild / Replacement 1999 X100 AJ26/AJ27 Petrol Rebuild / Replacement 2000 X100 AJ27 Petrol Rebuild / Replacement 2001 X100 AJ27 Petrol Rebuild / Replacement 2002 X100 AJ27 Petrol Rebuild / Replacement 2003 X100 AJ27 Petrol Rebuild / Replacement 2004 X100 AJ27 Petrol Rebuild / Replacement 2005 X100 AJ27 Petrol Rebuild / Replacement 2006 X100 AJ27 Petrol Rebuild / Replacement *1999 was a transition year between the AJ26 and AJ27 — if your registration falls in this year, we'll confirm your exact engine code before quoting.* We Cover Every Jaguar XK8 Model Year: ✓ Jaguar XK8 1996 Engine Rebuild ✓ Jaguar XK8 1999 Engine Rebuild ✓ Jaguar XK8 2002 Engine Rebuild ✓ Jaguar XK8 2005 Engine Rebuild ✓ Jaguar XK8 2006 Engine Rebuild If your registration year isn't listed above, get in touch — we'll confirm availability directly against your reg. Jaguar XK8 Engine Sizes ✓ Jaguar XK8 4.0 Litre Engine (AJ26, V8) ✓ Jaguar XK8 4.0 Litre Engine (AJ27, V8) Jaguar XK8 Fuel Types ✓ Jaguar XK8 Petrol Engine Rebuilds Jaguar XK8 Engine Costs A Jaguar XK8 engine rebuild starts from £4,500, whether your car has the AJ26 or the AJ27. 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 XK Variants Looking for a different XK engine? We also cover: [Jaguar XKR (X100) Engine →] · [Jaguar XK 4.2 V8 Engine →] · [Jaguar XK 5.0 V8 Engine →] · [Jaguar XKR (X150) Engine →] · [Jaguar XKR-S Engine →] [← View All Jaguar XK Engines] Frequently Asked Questions What engine does the Jaguar XK8 use? The Jaguar XK8 uses a 4.0-litre V8 from the AJ-V8 family. From 1996 to 1999, it used the AJ26. From 1999 to 2006, it used the AJ27 — an evolution of the earlier unit. How much does a Jaguar XK8 engine rebuild cost? Rebuilds start from £4,500, for either engine code. Exact price depends on condition and parts required — submit your reg for a fixed-price quote. Which engine code is fitted to my XK8? Enter your registration on this page and we'll confirm whether you have the AJ26 or the AJ27 before you're quoted anything. Do you rebuild AJ26 XK8 engines? Yes. We replace the timing chain, tensioners, and guides as standard on every AJ26 rebuild. Do you rebuild AJ27 XK8 engines? Yes. The AJ27 shares the same known pattern around timing chain tensioner wear, and we service it to the same standard as the AJ26. Do you supply used XK8 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 XK8 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 XK8 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 XK8 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 XK8 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 – XK8 Engine Rebuild Specialists", "url": "https://jaguargarage.uk/jaguar-xk8-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 XK8 Engine Rebuild & Replacement", "provider": { "@type": "AutoRepair", "name": "Jaguar Garage" }, "areaServed": "GB", "offers": { "@type": "Offer", "priceCurrency": "GBP", "price": "4500", "description": "Jaguar XK8 engine rebuild starting price, AJ26 and AJ27" } }, { "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "What engine does the Jaguar XK8 use?", "acceptedAnswer": { "@type": "Answer", "text": "The Jaguar XK8 uses a 4.0-litre V8 from the AJ-V8 family. From 1996 to 1999, it used the AJ26. From 1999 to 2006, it used the AJ27 — an evolution of the earlier unit." } }, { "@type": "Question", "name": "How much does a Jaguar XK8 engine rebuild cost?", "acceptedAnswer": { "@type": "Answer", "text": "Rebuilds start from £4,500, for either engine code. Exact price depends on condition and parts required — submit your reg for a fixed-price quote." } }, { "@type": "Question", "name": "Which engine code is fitted to my XK8?", "acceptedAnswer": { "@type": "Answer", "text": "Enter your registration on this page and we'll confirm whether you have the AJ26 or the AJ27 before you're quoted anything." } }, { "@type": "Question", "name": "Do you rebuild AJ26 XK8 engines?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. We replace the timing chain, tensioners, and guides as standard on every AJ26 rebuild." } }, { "@type": "Question", "name": "Do you rebuild AJ27 XK8 engines?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. 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Our team will advise honestly once we've matched your registration and understood your situation." } }, { "@type": "Question", "name": "Can you recover my XK8 if the engine has failed?", "acceptedAnswer": { "@type": "Answer", "text": "Yes — nationwide recovery is available from £70, and most vehicles are collected within a few hours of booking." } }, { "@type": "Question", "name": "How long does an XK8 engine rebuild take?", "acceptedAnswer": { "@type": "Answer", "text": "Most rebuilds are completed within 3-5 working days from the time your car arrives at our workshop." } }, { "@type": "Question", "name": "Is rebuilding better than fitting a used engine?", "acceptedAnswer": { "@type": "Answer", "text": "For most XK8 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." } } ] } ] }

We continue to rebuild and replace engine engines for every XK8 on the road.