Audi
S8
Porsche
Panamera
Audi S8 vs Porsche Panamera: 2024 Comparison
The short answer
Based on available data, the Porsche Panamera comes out ahead of the Audi S8 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
S8
Overall
Owner sentiment is strongly positive regarding the vehicle's core proposition as a high-performance luxury sedan, described as a "sleeper rocket with insane comfort" and "the best balance of comfort and performance possible." The twin-turbo 4.0L V8 (EA825) engine and ZF 8-speed automatic transmission are very frequently praised for their robust performance, smooth power delivery, and proven long-term reliability when properly maintained, with multiple reports of trouble-free operation beyond 100,000 miles, even on tuned vehicles. The interior build quality, quietness (especially with the optional dual-pane glass), and air suspension are also highlighted as exceptional. However, this enthusiasm is universally tempered by a very frequent and emphatic warning about extremely high ownership costs.
Best version to buy
Insufficient owner data available to declare a specific model year or trim (e.g., S8 Plus) as a definitive "best version." However, there is a strong, recurrent emphasis on seeking out vehicles where the critical turbocharger oil screen recall/service action (TSB 2044640) has been completed. For the D5 generation (post-2019), units produced after late 2018 are noted to have revised engine components (rocker arms) that resolved early issues, and all models are subject to a recall for the faulty Continental BSG (Belt Starter Generator) unit, which should be verified as completed.
Known issues
- ⚠Extremely high maintenance and repair costs: Routine service, tires, and brakes are very expensive; major repairs (turbos, transmission, engine mounts) can cost $5,000-$15,000+. Frequency: very frequent.
- ⚠Turbocharger failure due to oil screen blockage: A known defect in the D4 generation 4.0T engine where a restrictive oil screen can starve the turbos of oil, leading to catastrophic failure.
- ⚠Faulty Belt Starter Generator (BSG): Affects D5 generation models (and other Audis) as part of "Emissions Service Action 27BQ"; the unit can fail without warning around 40,000 miles. Replacement is covered by recall. 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 S8, based on the data above. If power matters more to you than running costs, the Audi S8 is worth a closer look instead.
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Frequently asked questions
Which is more reliable, the Audi S8 or the Porsche Panamera?
Owner reports show similar reliability sentiment for the Audi S8 and the Porsche Panamera. Check the known issues listed above for specific differences between the two.
Which is better for families, the Audi S8 or the Porsche Panamera?
The Audi S8 seats more passengers than the Porsche Panamera on its catalogued best-equipped version. Body type also differs: the Audi S8 is classed as a Sedan, the Porsche Panamera as a Liftback.
Which has better fuel economy, the Audi S8 or the Porsche Panamera?
The Porsche Panamera is more fuel-efficient on paper: 1.4-1.6 L/100km combined versus 10 L/100km for the Audi S8, based on the best-equipped catalogued version of each.
Which is cheaper to maintain, the Audi S8 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 S8. See the known issues comparison above.