Audi RS7 vs Audi S8
The short answer
Based on available data, the Audi RS7 comes out ahead of the Audi S8 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.
Specs side by side
What owners say
RS7
Overall
Owner sentiment is generally positive, with the RS7 praised as a fast, comfortable, and capable grand tourer that blends performance with daily usability. The twin-turbo 4.0L V8 engine is frequently highlighted for its immense power and linear delivery, providing a "blazing fast" and "spectacularly fast" experience. The car is consistently described as comfortable for long-distance cruising, with a refined interior and a balance of luxury and sportiness.
Best version to buy
Insufficient owner data available to declare a consensus "best" version. Discussions reference various model years and trims (e.g., 2016 RS7 Performance, 2024 RS7 Performance with increased power) without a clear preference emerging from the community feedback.
Known issues
- High Cost of Maintenance and Repairs: Very expensive routine maintenance, brake jobs (cited at ~$4,000 USD), and part replacements. Owners note a significant "RS Tax" on model-specific components. Frequency: very frequent.
- Turbo Oil Screen/Strainer Failure: A major, widespread issue primarily affecting the C7/C7.5 generation's 4.0T V8. Faulty screens can clog, leading to turbocharger failure and catastrophic engine damage.
- Suspension Comfort Degradation: Owners report the adaptive suspension in Comfort mode losing its plush, "gliding" quality over time, becoming noticeably firmer. Potential causes include worn components or calibration issues.
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.
The verdict
The Audi RS7 is the better choice for most buyers.
It has more power on its best-equipped version than the Audi S8, based on the data above. If efficiency matters more to you than outright power, the Audi S8 is worth a closer look instead.
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Frequently asked questions
Which is more reliable, the Audi RS7 or the Audi S8?
Owner reports show similar reliability sentiment for the Audi RS7 and the Audi S8. Check the known issues listed above for specific differences between the two.
Which is better for families, the Audi RS7 or the Audi S8?
Both seat a similar number of passengers based on our data. The Audi RS7 is classed as a Liftback, the Audi S8 as a Sedan, which affects cargo space and ride height for family use.
Which has better fuel economy, the Audi RS7 or the Audi S8?
Fuel consumption data is limited for one or both models. Check the specs table above for the figures available on each catalogued version.
Which is cheaper to maintain, the Audi RS7 or the Audi S8?
Exact maintenance costs aren't in our data, but reliability signals above are the closest proxy: fewer reported issues generally means lower repair costs over time.