Audi
A8
Porsche
Panamera
Audi A8 vs Porsche Panamera: 2024 Comparison
The short answer
Based on available data, the Porsche Panamera 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.
Panamera
Overall
Sentiment is deeply divided and heavily dependent on model year, powertrain, and ownership expectations. Long-term owners of V8-powered models, particularly the GTS and Turbo variants from the second generation (2017+), frequently praise them as among the best daily drivers they have ever owned, citing a blend of exceptional performance, practicality, safety, and surprising reliability with proper maintenance. However, significant and severe criticism is directed at the E-Hybrid models, especially first-generation examples, which are described as profoundly unreliable with catastrophic electrical failures, frequent breakdowns, and extremely short hybrid battery life (reportedly 3-5 years).
Best version to buy
Second-generation (2017+) V8 models, specifically the GTS and Turbo variants. The GTS is highlighted for its intoxicating engine character and as a sweet spot in the lineup.
Known issues
- ⚠Catastrophic E-Hybrid system failures: including complete electrical system failures, stranding owners, requiring frequent towing, and very short hybrid battery life (3-5 years). Frequency: very frequent for first-generation hybrids.
- ⚠Air suspension failures: compressor and component failures, typically occurring after 50,000-70,000 miles, with repairs costing several thousand dollars. Frequency: very frequent.
- ⚠High maintenance and repair costs: extremely expensive parts (e.g., tyres, brakes), dealer service, and repairs; described as "running a £70,000 car" even when purchased used. Frequency: very frequent.
The verdict
The Porsche Panamera 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 Porsche Panamera?
Owner reports show similar reliability sentiment for the Audi A8 and the Porsche Panamera. Check the known issues listed above for specific differences between the two.
Which is better for families, the Audi A8 or the Porsche Panamera?
The Audi A8 seats more passengers than the Porsche Panamera on its catalogued best-equipped version. Body type also differs: the Audi A8 is classed as a Sedan, the Porsche Panamera as a Liftback.
Which has better fuel economy, the Audi A8 or the Porsche Panamera?
The Porsche Panamera is more fuel-efficient on paper: 1.4-1.6 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 Porsche Panamera?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Porsche Panamera than the Audi A8. See the known issues comparison above.