Audi
A6
Infiniti
Q70
Audi A6 vs Infiniti Q70: 2025 Comparison
The short answer
The Audi A6 offers fuel economy, while the Infiniti Q70 excels at power instead. Choose the Audi A6 if you prioritize fuel economy in daily driving, or the Infiniti Q70 if power matters more for your needs. Both are covered by real owner reports on CarWizz.
Specs side by side
What owners say
A6
Overall
Sentiment is sharply divided by generation and powertrain. For the C7 (approx. 2012-2018) and C8 (approx. 2019-2023) generations, owner feedback is generally positive, praising the cars for their refined driving experience, comfortable and quiet ride, spacious interiors, and strong performance from the 3.0-liter engines (both TFSI and TDI). The A6 Allroad variant, in particular, receives high marks for its air suspension comfort, practicality, and impressive highway fuel economy.
Best version to buy
For the C7/C8 generations, the A6 Allroad 55 TDI (in Europe) and the A6 3.0T (55 TFSI) are highly recommended for their robust power delivery, torque, and reported reliability. The Prestige trim is favored for its comprehensive technology and comfort features, including the head-up display, massaging seats, and superior sound insulation.
Known issues
- ⚠High maintenance and repair costs: very frequent. General concerns about long-term reliability and expensive out-of-warranty repairs: very frequent. Wireless CarPlay connectivity issues (dropping, failure to connect): recurrent.
Q70
Overall
Mixed to positive sentiment, heavily dependent on engine choice and model year. The naturally aspirated 3.7L V6 (VQ37VHR) and 5.6L V8 (VK56VD) engines are widely praised for their strong power, reliability, and longevity, with the 3.7L noted as being "rock solid" and the V8 described as "fun as shit to drive." The vehicle is appreciated for its handsome looks, comfortable and capable handling on both back roads and interstates, and spacious interior, particularly in the long-wheelbase (L) models. Significant and consistent criticism is directed at the outdated, overly complicated, and slow infotainment system and gauge cluster, which is described as feeling a generation behind competitors.
Best version to buy
2014 and newer Q70 with the 5.6L V8. This recommendation is based on mechanical quality-of-life updates that addressed known issues from the preceding M56 generation, such as the timing chain and rear-wheel steering.
Known issues
- ⚠Outdated and problematic infotainment system: described as overly complicated, slow, and a generation behind; Bluetooth connectivity issues with multiple phones. Frequency: very frequent.
- ⚠Unresponsive 7-speed automatic transmission: significant lag and delay in kick-down, especially in default and Eco modes; harsh, noticeable shifts; described as having a "dead spot" and being sluggish. Frequency: very frequent.
- ⚠Poor fuel economy: consistently reported as a downside for both the 3.7L V6 and 5.6L V8 engines. Frequency: very frequent.
The verdict
The Audi A6 is the better choice for most buyers.
It has better fuel economy on its best-equipped version than the Infiniti Q70, based on the data above. If power matters more to you than running costs, the Infiniti Q70 is worth a closer look instead.
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Frequently asked questions
Which is more reliable, the Audi A6 or the Infiniti Q70?
Owner reports show similar reliability sentiment for the Audi A6 and the Infiniti Q70. Check the known issues listed above for specific differences between the two.
Which is better for families, the Audi A6 or the Infiniti Q70?
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 Audi A6 or the Infiniti Q70?
The Audi A6 is more fuel-efficient on paper: 6.7-7.8 L/100km combined versus 13.1 L/100km for the Infiniti Q70, based on the best-equipped catalogued version of each.
Which is cheaper to maintain, the Audi A6 or the Infiniti Q70?
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.