Audi
A3
Infiniti
Q30
Audi A3 vs Infiniti Q30: 2025 Comparison
The short answer
Based on available data, the Audi A3 comes out ahead of the Infiniti Q30 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
A3
Overall
Sentiment is mixed and heavily dependent on generation, engine choice, and maintenance expectations. For the 8V generation (approx. 2013-2020), owner feedback is generally positive regarding driving dynamics, fuel efficiency (particularly with the 1.4 TFSI petrol and 2.0 TDI diesel), and interior quality for its class. These models are often described as comfortable, nice to drive, and reliable when properly maintained.
Best version to buy
Insufficient owner data available to declare a single "best" version, but strong preferences are indicated for specific powertrains. For the 8V generation, the 2.0 TDI diesel and 1.8/2.0 TFSI petrol engines are cited as the most robust.
Known issues
- ⚠High and unpredictable maintenance/repair costs: very frequent criticism across all generations and a primary driver of negative sentiment.
- ⚠Engine-specific problems: including timing chain issues on some engines, turbocharger failures on higher-mileage diesels (around 150k miles/240k km), and plastic water/coolant pump failures (requiring replacement with a metal unit).
- ⚠DSG (S-Tronic) transmission concerns: reports of rough shifting, hesitations, and reliability worries, particularly in early iterations or when paired with smaller engines. Frequency: recurrent.
Q30
Overall
Owner sentiment is mixed, with a clear divide between appreciation for its driving dynamics, fuel economy, and perceived value, and significant criticism regarding reliability, maintenance costs, and brand support. The vehicle is frequently praised for its Mercedes-Benz-sourced 2.0-liter turbocharged engine and AWD system, which contribute to a driving experience described as responsive and enjoyable, particularly in Sport mode. Fuel economy is noted as a strong point, with diesel models reportedly achieving 60-65 MPG (UK) on short drives and 40-55 MPG on longer journeys.
Best version to buy
Insufficient owner data available to designate a specific trim as "best." Discussions suggest the 2.0-liter turbocharged petrol and diesel engines are the primary powertrains of interest. The Sport trim is mentioned for its driving mode, but no trim-level consensus emerges from the available feedback.
Known issues
- ⚠Major electrical/system failures: simultaneous failure of power steering, 4WD, ABS, and emergency brake systems with multiple warning lights; suspected software glitch or wiring harness issue. Frequency: isolated.
- ⚠Expensive and frequent mechanical repairs: reports include cracked coolant pipes (£2,800 / ~$3,500 USD), complete A/C system failure (£3,400 / ~$4,300 USD), and persistent headlight issues that could not be resolved even after replacement…
- ⚠Engine reliability concerns: the Mercedes-sourced 2.0L turbocharged (M274) engine is noted as being prone to piston failures, turbo issues, and water pump failures by those familiar with the platform.
The verdict
The Audi A3 is the better choice for most buyers.
It has better fuel economy on its best-equipped version than the Infiniti Q30, based on the data above. If power matters more to you than running costs, the Infiniti Q30 is worth a closer look instead.
Explore further
Other comparisons
Not sure which one fits you?
Answer a few questions and get a personalized recommendation.
Frequently asked questions
Which is more reliable, the Audi A3 or the Infiniti Q30?
Owner reports show similar reliability sentiment for the Audi A3 and the Infiniti Q30. Check the known issues listed above for specific differences between the two.
Which is better for families, the Audi A3 or the Infiniti Q30?
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 A3 or the Infiniti Q30?
The Audi A3 is more fuel-efficient on paper: 0.3-0.4 L/100km combined versus 6.7 L/100km for the Infiniti Q30, based on the best-equipped catalogued version of each.
Which is cheaper to maintain, the Audi A3 or the Infiniti Q30?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Infiniti Q30 than the Audi A3. See the known issues comparison above.