Two V6 diesel engines sharing the same family heritage but very different displacement, character, and cost to replace. Exactly which Jaguar models got the 276DT 2.7 TDV6, which got the 306DT 3.0 SDV6, how they differ, and how to confirm which one your car actually has.
If your Jaguar is a diesel V6 badged 2.7D, 3.0D, TDV6 or SDV6, it will be one of two closely related but mechanically different engines: the 276DT 2.7 TDV6 or the 306DT 3.0 SDV6 - and the badge alone won't always tell you which one you're looking at.
Full model‑by‑model fitment table below, plus how to confirm which engine your specific vehicle has.
Every Jaguar model that used either the 276DT 2.7 TDV6 or the 306DT 3.0 SDV6, with the years and badges under which each was sold.
| Model | Engine | Badges Used | Years | Notes |
|---|---|---|---|---|
| XF X250 | 276DT (2.7 TDV6) | 2.7D, 3.0D (early) | 2008–2011 | Pre‑facelift XF used the 2.7; some badged 3.0D |
| XF X250 (facelift) | 306DT (3.0 SDV6) | 3.0D, SDV6 | 2011–2015 | Facelift XF moved to 3.0 |
| XF X260 | 306DT (3.0 SDV6) | D300 (later), SDV6 | 2015–2024 | X260 used 306DT until AJ20D6 replaced it from 2020 |
| XJ X351 | 276DT (2.7 TDV6) | 2.7D, TDV6 | 2010–2015 | Early X351 used 2.7 |
| XJ X351 (facelift) | 306DT (3.0 SDV6) | 3.0D, SDV6 | 2015–2019 | Facelift XJ moved to 3.0 |
| F‑Pace X761 | 306DT (3.0 SDV6) | 3.0D, D300 | 2016–present | F‑Pace used 306DT from launch, later badged D300 |
Model years are approximate; exact changeover dates vary by chassis number. The "3.0D" badge was used for both the 276DT and the 306DT on different models and years - always confirm by engine number, not badge.
Same V6 family, but the 306DT is more than just a capacity bump.
The 306DT is a genuine evolution - not just a bored‑out 276DT but a different block casting, different turbo configuration, different timing system, and different ECU strategy. Parts compatibility between the two is minimal [EM-INTERVIEW].
Located on the block, typically on the left‑hand side near the starter motor. The prefix identifies the family - full location diagram on our Engine Number Location guide.
The fastest method. Our Registration Lookup tool cross‑references your plate against build data instantly.
The 306DT has a noticeably different rocker cover and a larger single intercooler pipe arrangement compared to the 276DT's twin‑pipe setup.
The two engines are not interchangeable in any sense that matters to a buyer. Mounting points, ECU calibration, ancillary compatibility and even the physical dimensions differ enough that a supplier quoting for "an XF diesel engine" without confirming which architecture you actually have is quoting blind. Ordering a 306DT for a 276DT car means a return, a delivery delay, and in most cases a second shipping cost on top of the original - entirely avoidable by confirming the exact engine code before requesting a quote.
The replacement cost difference is also significant. A reconditioned 276DT supply‑only sits around £5,000–£7,500 [EM-QUOTE], while a 306DT is typically £6,500–£9,500 [EM-QUOTE] - a difference of up to £2,000 before labour. That alone makes identification worth the effort.
The specific wrong answers people arrive at, and why.
No. They share a V6 layout and the AJD‑V6 family name, but they are different block castings. The 306DT has a different bore/stroke, different turbocharger configuration (sequential vs parallel), a timing chain instead of a belt, and different ECU calibration. Parts are not interchangeable.
Check the engine number stamp. As a rule of thumb: pre‑2011 XF X250 with the 2.7D badge is a 276DT; post‑2011 facelift XF with the 3.0D or SDV6 badge is a 306DT. But always verify - some early cars are mis‑badged. Use our Registration Lookup tool for certainty.
Both have their own documented issues. The 276DT is known for oil pump housing failure (which can kill the engine), while the 306DT has a reputation for crankshaft bearing fatigue, particularly on pre‑2015 units [PATTERN DATA]. Neither is immune, but the 306DT is generally considered the more durable of the two when properly maintained - though it costs significantly more to replace when it does fail.
No. The F‑Pace was launched in 2016 with the 306DT 3.0 SDV6 as its diesel V6 option. All diesel V6 F‑Paces are 306DT. Some later models switched to the AJ20D6 straight‑six from around 2020.
Technically possible but economically unviable. The engines have different mounting points, different ECU and wiring harnesses, different cooling system routing, and different gearbox maps. A full conversion would cost more than buying a car with the correct engine already fitted. If your 276DT has failed, replace it with the same engine code.
No SpeculationWhere a fitment year isn't confirmed, we say so - never a confident guess.
Cross‑ReferencedFitment data checked against multiple independent parts and specialist sources.
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