Which engine is in your Jaguar? Our complete guide covers every Jaguar engine code — where to find the engine number, how to read it, and how to confirm fitment before buying a replacement.
Your Jaguar's engine code is the single most important piece of information for ordering a replacement or confirming fitment. The code is stamped on the engine block and embedded in your VIN — and our guide shows you exactly how to find and read both.
Use our free registration lookup tool to confirm your engine instantly.
Every Jaguar engine code from the modern era, with model fitment and key identifiers.
| Engine Code | Type | Displacement | Models | Years |
|---|---|---|---|---|
| AJ133 | V8 Petrol SC | 5.0L | XF, XJ, F-Type, XK | 2009–2015 |
| AJ126 | V6 Petrol SC | 3.0L | XF, XJ, F-Type, F-Pace | 2012–2021 |
| 306DT | V6 Diesel | 3.0L | XF, XJ, F-Pace | 2010–2021 |
| 276DT | V6 Diesel | 2.7L | XF, XJ, S-Type | 2004–2010 |
| AJ20D6 | Straight-6 Diesel | 3.0L | XF, F-Pace, XJ | 2020–present |
| 204DTD | 4-cyl Diesel | 2.0L | XE, XF, F-Pace, E-Pace | 2015–present |
| 204PT | 4-cyl Petrol | 2.0L | XE, XF, F-Pace, E-Pace | 2015–present |
| 224DT | 4-cyl Diesel | 2.2L | X-Type, S-Type | 2004–2009 |
| Duratorq 2.0 | 4-cyl Diesel | 2.0L | X-Type | 2003–2009 |
| AJ-V8 | V8 Petrol | 4.0L / 4.2L | XK, XJ, S-Type | 1996–2009 |
| AJ6 / AJ16 | Straight-6 Petrol | 3.6L / 4.0L | XJ, XJS | 1986–1996 |
| XK6 | Straight-6 Petrol | 2.8L / 3.4L / 3.8L / 4.2L | XK, Mark 2, E-Type | 1948–1992 |
| V12 | V12 Petrol | 5.3L / 6.0L | XJS, XJ | 1971–1997 |
| GTDi 2.0 | 4-cyl Petrol | 2.0L | XF, XJ | 2011–2015 |
Not every engine code appears in every model year — use the full fitment matrix for detailed chassis-level coverage.
The 8th character of your Jaguar VIN is your engine code — once you know what to look for, it takes seconds to confirm.
Your Jaguar's VIN (Vehicle Identification Number) is a 17-character code that encodes everything about your car, including the engine. The 8th character — sometimes called the "engine code digit" — maps directly to a specific engine type. For example, an 8th character of 5 often indicates a 3.0 V6 diesel, while 8 might indicate a 5.0 V8. However, the exact mapping varies by model and year, so we've built a dedicated VIN Decoder tool that handles the complexity for you.
Example: VIN SAJWA1EN8G8V12345 — the 8th character is 8, which may indicate a 5.0 V8. Always confirm with our decoder, as multiple codes can share the same digit across different model years.
Where to find the engine number stamp on the block.
Stamped on the cylinder block near the thermostat housing, visible from the top with the engine cover removed.
Located on the left-hand side of the block, below the exhaust manifold — often requires a torch and mirror to read.
Stamped on the front of the block, behind the alternator — visible from above on most models.
Found on the rear of the block, near the bellhousing — often requires a mirror and good lighting.
For a detailed diagram per engine family, see our Engine Number Location Technical Reference.
Every Jaguar model, its chassis code, and the engine codes you'll find under the bonnet.
| Model | Chassis | Engine Codes |
|---|---|---|
| XE | X760 | 204DTD, 204PT, AJ126 |
| XF | X250 | 276DT, AJ-V8, AJ126 |
| XF | X260 | 204DTD, 204PT, 306DT, AJ126, AJ20D6 |
| XJ | X350 | AJ-V8, 276DT |
| XJ | X351 | 306DT, AJ126, AJ133, AJ20D6 |
| F-Pace | X761 | 204DTD, 204PT, 306DT, AJ126, AJ20D6 |
| E-Pace | X540 | 204DTD, 204PT |
| F-Type | X152 | AJ126, AJ133 |
| XK | X100 | AJ-V8 |
| XK | X150 | AJ133 |
| S-Type | X200 | 276DT, AJ-V8 |
| X-Type | X400 | 224DT, Duratorq 2.0 |
This table is a summary — for full cross-generation coverage, see the complete fitment matrix.
The mistakes that cost Jaguar owners time, money and the wrong engine delivery.
Pro tip: Use our free registration lookup — it pulls your exact engine code from the VIN in seconds, with zero risk of misreading a stamped number.
You have three options: (1) The 8th character of your VIN is the engine code digit — use our VIN decoder to map it. (2) The engine number is stamped on the block; location varies by engine type, with a full guide above. (3) Our free registration lookup tool pulls your engine code instantly from the DVLA database.
No. The engine code identifies the type (e.g., AJ126, 306DT), while the engine number is a unique serial number for your specific unit. The code is what you need for ordering a replacement or confirming fitment — the serial number is for vehicle registration and provenance.
Absolutely — the engine code is the minimum required specification. However, you should also confirm the year and any revision markers, as some engines have pre- and post-revision variants (e.g., AJ133 timing chain tensioner was revised in 2013). Our specialist network uses the engine code plus model year to source the exact matching unit.
Jaguar regularly updates engines within a model lifecycle — for example, the XF X260 started with the 306DT V6 diesel and later switched to the AJ20D6 straight-six. Both are D300-badged but are mechanically unrelated. Always use the engine code, not the badge, to identify your engine.
We've covered the most common Jaguar engines. If your code isn't listed, it may be a rare or older unit — please contact us and we'll add it to our reference database. Alternatively, check our full fitment matrix, which includes all Jaguar engines from the 1990s onward.
Verified DataEngine codes and fitment data cross-referenced from multiple independent sources.
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