BMW
6 Series
Owner report available
BMW
8 Series
Owner report available
BMW 6 Series vs BMW 8 Series
The short answer
The BMW 6 Series offers fuel economy, while the BMW 8 Series excels at power instead. Choose the BMW 6 Series if you prioritize fuel economy in daily driving, or the BMW 8 Series if power matters more for your needs. Both are covered by real owner reports on CarWizz.
Specs side by side
What owners say
6 Series
Overall
Sentiment is mixed and heavily dependent on the specific generation and powertrain. The 6 Series is widely admired for its styling, described as "sexy" and "beautiful," and is considered a desirable, emotional purchase. However, long-term owner reports consistently highlight significant concerns regarding reliability and high maintenance costs, particularly for models equipped with V8 engines (N63).
Best version to buy
Insufficient owner data available to declare a consensus "best" version. Anecdotal praise exists for the post-LCI (Technical Update) F12/F13 650i with the N63TU engine, noted for improved reliability over the pre-LCI N63.
Known issues
- High maintenance and repair costs: very frequent. V8 engine reliability concerns (N63): oil leaks, cooling system failures, requiring tows. Frequency: recurrent.
8 Series
Overall
Insufficient owner data available to determine overall sentiment. The provided community feedback contains only a few isolated, indirect references to the 8 Series. One mention notes it outsells the BMW Z4, indicating it is not the brand's lowest-volume model.
Best version to buy
Insufficient owner data available.
Known issues
- Potential transfer case reliability: A single, second-hand report from a dealership employee suggests the transfer case system (shared with BMW SUVs) could be an issue, with failures most frequently observed between 50,000 and 80,000 miles…
The verdict
The BMW 6 Series is the better choice for most buyers.
It has better fuel economy on its best-equipped version than the BMW 8 Series, based on the data above. If power matters more to you than running costs, the BMW 8 Series is worth a closer look instead.
Explore further
Common problems by model year
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Frequently asked questions
Which is more reliable, the BMW 6 Series or the BMW 8 Series?
Owner reports show similar reliability sentiment for the BMW 6 Series and the BMW 8 Series. Check the known issues listed above for specific differences between the two.
Which is better for families, the BMW 6 Series or the BMW 8 Series?
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 BMW 6 Series or the BMW 8 Series?
The EPA rates the 2019 BMW 6 Series at 20–23 mpg combined and the 2026 BMW 8 Series at 19–24 mpg, depending on the version.
Which is cheaper to maintain, the BMW 6 Series or the BMW 8 Series?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the BMW 6 Series than the BMW 8 Series. See the known issues comparison above.