1996–2006
2006–2015
Two generations of Jaguar's iconic grand tourer. The X100 is a classic with timeless curves and V8 power; the X150 brought modern aluminium construction, sharper handling, and more performance. Here's which generation makes sense for your budget and driving style.
The X150 is the better buy for most buyers - it's more modern, offers better performance and handling, and its AJ133 engines are well‑supported. The X100 is a classic with timeless styling and a more traditional GT feel, but it's ageing and parts are becoming harder to find. For everyday luxury and modern performance, the X150 wins; for a classic Jaguar GT experience on a budget, the X100 is still a compelling choice.
Full comparison, five‑year cost projection, and which generation fits your driving below.
| XK X100 (1996–2006) | XK X150 (2006–2015) | |
|---|---|---|
| Construction | Steel monocoque | Aluminium‑intensive (lighter, more rigid) |
| Key Engines | AJ‑V8 4.0 · AJ‑V8 4.2 | AJ‑V8 4.2 (early) · AJ133 5.0 V8 SC |
| Power (range) | 290–400 PS | 300–550 PS |
| 2025 UK Enquiries | [ESTIMATED] ~30 | [ESTIMATED] ~40 |
| Typical Recon Fitted Cost | AJ‑V8: £3,000–£5,500 | AJ‑V8: £3,000–£5,500; AJ133: £5,500–£9,000 |
| Defining Failure | AJ‑V8 chain guide wear | AJ133 pre‑2013 tensioner / AJ‑V8 chain wear |
| Best For | Classic GT styling, value, traditional feel | Modern performance, handling, newer tech |
Enquiry volumes from 2025 Engine Failure Index. Costs are independent specialist supply‑and‑fit.
The X150 is the better choice for most buyers. It offers a more modern driving experience, better performance, and a more refined chassis – the aluminium construction makes it lighter and more agile than the X100. The X150 also benefits from stronger parts availability and a more extensive specialist network. The X100 is a classic – its timeless design and more traditional V8 character are still appealing – but it's older, thirstier, and its parts are becoming scarcer. If you want the latest XK experience, choose the X150; if you're after a classic on a budget and can handle older car maintenance, the X100 is a great buy.
The X100 (1996–2006) was the first modern XK, a car that revived Jaguar's grand touring heritage. Its engine range included the AJ‑V8 4.0‑litre (290 PS) and 4.2‑litre (300–400 PS) naturally aspirated and supercharged versions. The AJ‑V8 is known for timing chain guide wear, which if ignored can lead to catastrophic failure – see our AJ‑V8 Chain Guide Wear page. Replacement costs are moderate at £3,000–£5,500. The X100's interior is more traditional, with a wood‑heavy dashboard and analogue dials, appealing to those who prefer classic Jaguar luxury. The X100 is also significantly cheaper to buy – a good example can be found for £8,000–£15,000, compared to £12,000–£25,000 for an X150. Full specs on the AJ‑V8 Knowledge Centre.
The X150 (2006–2015) was a radical redesign – aluminium construction, sharper styling, and a focus on performance. Early cars used the AJ‑V8 4.2‑litre (300–420 PS), while later models (from 2009) featured the AJ133 5.0‑litre supercharged V8 (up to 550 PS in XKR‑S). The AJ133 pre‑2013 has timing chain tensioner risks – details on AJ133 Chain Tensioner Failure. Replacement costs: AJ‑V8 £3,000–£5,500, AJ133 £5,500–£9,000. The X150 benefits from a 190kg weight reduction over the X100, improving handling and fuel economy. The X150 also has a more modern interior and better tech. Full specs on the AJ133 Knowledge Centre and AJ‑V8 Knowledge Centre.
The X100's strengths are timeless design, value, and character. Its styling is widely regarded as one of Jaguar's most elegant modern designs, and it offers a more traditional, cosseting interior that many classic car enthusiasts prefer. The X100 is significantly cheaper to buy, and its AJ‑V8 engine is simpler and cheaper to replace than the newer supercharged units. The X100's chain guide wear is a known, manageable issue, and the car's simpler electronics mean fewer age‑related problems. For those who want a classic grand tourer and are happy to maintain an older car, the X100 offers incredible value for money. However, parts availability is a growing concern, and fuel economy is notably worse than the X150.
Over a typical 5‑year ownership period, the X150 is roughly £1,500–£2,500 cheaper to run than the X100, despite its higher purchase price. This is driven by better fuel economy (the X150's lighter body and more efficient engines save 10–15% on fuel), lower maintenance costs (parts are more readily available and specialists have more experience with the newer engines), and stronger residual values. The X100's lower purchase price can offset this for the first few years, but after five years, the X150 typically holds its value better, making it the more cost‑effective long‑term choice. For a detailed breakdown, see our engine replacement cost guide.
Choose the X100. It offers timeless looks and a traditional GT feel at a bargain price. Buy a well‑maintained AJ‑V8 car and budget for chain guide inspection.
Choose the X150. The AJ133 V8 delivers thunderous performance, and the car's sharper handling and modern interior make it the better everyday GT.
The X100 is simpler to work on and has a classic feel, but parts are getting harder to find. If you're handy, the X100 can be a rewarding project; otherwise, the X150 is the safer bet.
Whichever you choose, always apply the repair vs replace framework before committing to a major repair – the 60% scrap threshold applies to both.
Generally, yes – the X150's engines (AJ‑V8, AJ133) are more modern and better supported, especially post‑2013 AJ133 units. The X100's AJ‑V8 is simpler but older, and its chain guide wear is a known issue. The X150 also benefits from better electronics and fewer age‑related problems.
The X100's AJ‑V8 is cheaper at £3,000–£5,500. The X150's AJ‑V8 is similar, but its AJ133 is £5,500–£9,000. Labour times are similar. The X100's older design can sometimes make parts easier to find, but availability is declining.
Yes – if you appreciate classic Jaguar styling and a traditional GT feel, the X100 offers incredible value. Just be prepared for higher fuel consumption and potential parts scarcity. A well‑maintained example can be a joy to own.
Jaguar uses a 60% scrap threshold: if the cost of a replacement engine exceeds 60% of the vehicle's market value, it's usually cheaper to scrap the car. We explain this in our repair‑or‑replace framework.
Real UK Enquiries - data from 2025.
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