The short answer
Based on available data, the Audi A8 comes out ahead of the Lexus LS on 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.
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
Overall
The sentiment is overwhelmingly positive, characterized by deep owner loyalty and satisfaction with the vehicle's core mission of providing unparalleled long-term comfort, refinement, and reliability. The LS is consistently described as a benchmark for a "decade-plus" ownership experience with minimal drama, offering a sense of solidity, quietness, and effortless power that makes other vehicles feel "a bit cheap by comparison." While there is strong consensus on its supreme comfort and build quality, nuanced criticisms exist regarding specific model years and components. The LS460 (2007-2017) is praised for its bulletproof V8 but noted for expensive wear items like control arms and air suspension.
Best version to buy
For the LS460 generation, later model years (e.g., 2017) are implied to be more refined and reliable than early first-year models (e.g., 2007), which are described as "Toyota's bastard child for reliability." For the current LS500 generation, the LS500h AWD with the "Teammate" advanced driver-assist system is mentioned as a highly capable but rare and expensive configuration. There is no single trim consensus, but the underlying recommendation is to seek well-maintained examples with full service histories, regardless of specific year or trim.
Known issues
The verdict
The Lexus LS is the better choice for most buyers.
It has stronger reliability sentiment in owner reports than the Audi A8, based on the data above. If the specific known issues on the Lexus LS are a dealbreaker, the Audi A8 is worth a closer look instead.
Common problems by model year
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Owner reports lean more positive on reliability for the Lexus LS than the Audi A8. See the known issues comparison above for the specific concerns owners report on each.
The Audi A8 seats more passengers than the Lexus LS on its catalogued best-equipped version. Body type also differs: the Audi A8 is classed as a Sedan, the Lexus LS as a Sedan.
The EPA rates the 2027 Audi A8 at 22 mpg combined and the 2026 Lexus LS at 21 mpg, depending on the version.
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Audi A8 than the Lexus LS. See the known issues comparison above.