Every Jaguar engine ever fitted to a production model, explained in one place. From the classic XK6 straight‑six to the modern Ingenium four‑cylinder and the thunderous AJ‑V8. Get specifications, reliability verdicts, real‑world cost data, and links to in‑depth knowledge centres.
This database covers every Jaguar engine family, from the 1940s XK6 to today's Ingenium range. We break down each engine's specifications, known weaknesses, replacement costs, and reliability verdict - all drawn from our proprietary 24,650+ enquiry database and verified specialist interviews.
JAG‑VERIFIED to PATTERN DATA.Use this index to navigate to the engine you need, then explore its reliability, costs, and common failures.
Jaguar's modern modular engine range, introduced in 2015. Available in diesel (AJ200D/204DTD) and petrol (AJ200P/204PT) variants, with later revisions carrying new codes.
Learn more about Ingenium reliability in our 204DTD failure rate and 204PT failure rate pages.
Jaguar's V6 engines, spanning the older AJ‑V6 (used in S‑Type, X‑Type) and the modern 3.0 supercharged AJ126 (used in XF, XJ, F‑Type, F‑Pace).
For detailed cost analysis, see our AJ126 failure rate and Is an AJ126 failure a write‑off?
Jaguar's iconic V8 engines, from the early 4.0 and 4.2 to the 5.0 naturally aspirated and supercharged (AJ133). Fitted to XF, XJ, XK, F‑Type, and F‑Pace SVR.
Explore our AJ133 failure rate and AJ126 vs AJ133 comparison.
The engines that defined Jaguar's heritage: the legendary XK6 straight‑six and the V12 that powered the XJS and early XJ models.
For classic Jaguar enthusiasts, see our engine code decoder and fitment guide.
During the Ford ownership era, Jaguar used several Ford‑derived engines, primarily diesels, in the X‑Type and early XF.
Ford‑sourced engines are covered in our 224DT failure rate and X‑Type replacement verdict.
We cover 17 distinct engine families on this site, spanning from the 1940s XK6 to the latest Ingenium 2.0. Each has its own Knowledge Centre with full details.
Based on our data, the post‑2013 AJ133 V8 and the later Ingenium petrol (204PT, AJ20P6) show the fewest reported failures. However, reliability depends heavily on maintenance history. See our failure rate by engine for the full picture.
Check your VIN or the engine code stamped on the block. Our engine code guide and engine number location pages will help you confirm.
Each engine's Knowledge Centre includes a cost table for used, reconditioned, and rebuilt units, plus labour hours. You can also visit our economics centre for per‑model verdicts.
15+ vetted specialists - every engine page is informed by real workshop expertise.
9,000+ enquiries - our data is drawn from real UK owner quotes, not guesswork.
Independent editorial - we are not a garage. We research and route to specialists.
All data tagged - every figure carries a source badge for full transparency.
Use our engine database to find your engine, then get a real quote from a vetted specialist.
ENGINE COMPATIBILITY CHECKER OUR VETTED SPECIALISTS