Audi
A8
Jaguar
XJ
Audi A8 vs Jaguar XJ: 2024 Comparison
The short answer
Based on available data, the Jaguar XJ comes out ahead of the Audi A8 on fuel economy and power. Check the specs table and owner sentiment below for the full comparison before deciding between the two. Both are covered by real owner reports on CarWizz.
Specs side by side
What owners say
A8
Overall
Sentiment is generally positive among long-term owners, particularly for the D5 generation (2018+), which is praised for its exceptional ride comfort, quiet cabin, advanced technology, and strong value proposition on the used market. The D5 is frequently described as a "hovercraft" for its sublime, non-floating air suspension and is noted for being significantly lighter than its rivals due to its aluminum construction, contributing to better handling and fuel economy. Owner satisfaction is often tied to purchasing the vehicle as a lightly used or CPO example at a steep discount from MSRP, where its blend of luxury, technology, and driving dynamics presents a compelling alternative to the Mercedes S-Class and BMW 7 Series.
Best version to buy
For the D5 generation (2018+), a well-optioned example is highly recommended. Key desired options include the Executive Package (22-way seats with ventilation/massage, head-up display), Driver Assistance Package (adaptive cruise with traffic jam assist), dual-pane acoustic glass, the premium lighting package (HD Matrix LED, OLED taillights), and the Bowers & Wilkins audio system.
Known issues
- ⚠High maintenance and repair costs: very expensive parts (e.g., air struts ~$2,200 each, headlights ~$3,000) and labor, leading to high annual ownership costs. Frequency: very frequent.
- ⚠Mild Hybrid System (Belt Starter Generator/BSG) failures: a known issue on D5 (2018+) models with the 48V system, potentially leading to expensive repairs; subject to a technical service campaign (27BQ). Frequency: recurrent.
- ⚠Electronic gremlins: concerns over long-term reliability of complex infotainment, driver aids, and other electronic systems; some isolated reports of issues requiring multiple resets. Frequency: recurrent.
XJ
Overall
Sentiment is deeply divided and heavily dependent on the specific generation and powertrain. For the classic X300/X308 (mid-1990s to early 2000s) and the Ford-era X350/X358 (2003-2009), long-term owner feedback is mixed, with strong praise for their distinctive styling, luxurious interiors, and driving experience, but severe criticism for reliability, aging poorly after high mileage, and costly repairs. The aluminum-bodied X350/X358 generation, in particular, is noted for its rust-free construction and more reliable naturally-aspirated 4.2L V8, with some owners reporting affordable maintenance using common Ford/Lincoln parts.
Best version to buy
For the X350/X358 generation (2003-2009), the 2006-2009 model years with the naturally-aspirated 4.2L V8 are recommended to avoid early issues present in 2004-2005 models. The Super V8 (SV8) trim is highlighted as a particularly good example.
Known issues
- ⚠Cooling system failures: plastic pipes, thermostat housings, water pumps, and crossover pipes become brittle and leak, requiring comprehensive replacement. Frequency: very frequent (across multiple generations).
- ⚠Electrical and infotainment problems: from blue-screen failures requiring a full reboot in older models to pervasive electronic component failures (instrument clusters, battery drains) in newer ones. Frequency: very frequent.
- ⚠Aging interior materials: door handle cables breaking, adhesive failing on trim, leather and wood deteriorating, especially in high-mileage examples. Frequency: recurrent.
The verdict
The Jaguar XJ is the better choice for most buyers.
It has better fuel economy on its best-equipped version than the Audi A8, based on the data above. If power matters more to you than running costs, the Audi A8 is worth a closer look instead.
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Frequently asked questions
Which is more reliable, the Audi A8 or the Jaguar XJ?
Owner reports show similar reliability sentiment for the Audi A8 and the Jaguar XJ. Check the known issues listed above for specific differences between the two.
Which is better for families, the Audi A8 or the Jaguar XJ?
Data on family-specific factors like cargo space is limited for one or both models, but based on available reports, both are positioned as practical daily drivers. Check the specs table above for seating and body type.
Which has better fuel economy, the Audi A8 or the Jaguar XJ?
The Jaguar XJ is more fuel-efficient on paper: 11.1 L/100km combined versus 11.3 L/100km for the Audi A8, based on the best-equipped catalogued version of each.
Which is cheaper to maintain, the Audi A8 or the Jaguar XJ?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Jaguar XJ than the Audi A8. See the known issues comparison above.