Audi
RS5
BMW
M3
Audi RS5 vs BMW M3: 2025 Comparison
The short answer
The Audi RS5 offers fuel economy, while the BMW M3 excels at power instead. Choose the Audi RS5 if you prioritize fuel economy in daily driving, or the BMW M3 if power matters more for your needs. Both are covered by real owner reports on CarWizz.
Specs side by side
What owners say
RS5
Overall
Sentiment is mixed and heavily dependent on the specific generation and powertrain. The naturally aspirated V8 models (B8/B8.5, 2013-2015) are praised for their thrilling, high-revving engine character, exceptional exhaust sound, and perceived build quality, making them desirable for driving enthusiasts. However, they are associated with very high and unpredictable maintenance costs outside of warranty.
Best version to buy
Insufficient owner data available to declare a single "best" version, as preferences are split by generation. Enthusiasts seeking engine character and sound strongly favor the B8/B8.5 generation with the 4.2L FSI V8.
Known issues
- ⚠**B9 Generation (2018+ 2.9L TFSI V6):** Dynamic Ride Control (DRC) suspension leaks: very frequent issue reported at mileage thresholds (often above 60k-70k miles), leading to expensive repairs (~$7k-$11k). Frequency: very frequent.
- ⚠Engine ancillary failures: PCV valve leaks and water pump failures are recurrently mentioned as common points of failure for the EA839 engine. Frequency: recurrent.
- ⚠High cost of consumables: brake pads, rotors, and tires are noted as being exceptionally expensive. Frequency: recurrent.
M3
Overall
Sentiment is highly polarized and varies significantly by generation. For the current G80 generation (2021+), owner feedback is extremely positive regarding performance, engine reliability (S58), and daily driving capability, with many calling it the best car they've ever owned. However, this generation is also the subject of intense and very frequent criticism for its controversial front-end styling, specifically the large kidney grille design, which many find "hideous" or "ugly." For the previous F80 generation (2014-2018), sentiment is overwhelmingly positive, with owners praising its driving dynamics, DCT transmission, reliability as a daily driver, and timeless looks.
Best version to buy
For the F80 generation (2014-2018), the 2016+ model years are highlighted due to an upgraded crank hub friction plate from the factory, which addresses a known concern. A manual transmission is highly desired for engagement, though the DCT is also praised.
Known issues
- ⚠Controversial Styling (G80 Generation): Very frequent and intense criticism of the large kidney grille and front-end design, described as "hideous," "ugly," and incongruous with the rear of the car. Frequency: very frequent.
- ⚠SMG Transmission Reliability & Driveability (E46 Generation): The Sequential Manual Gearbox is cited as a major failure point and the primary element that ages the car, with poor shift quality and reliability concerns.
- ⚠Crank Hub Concern (F80 Generation): Potential for the crank hub to spin on the S55 engine, though widely reported in owner discussions as an overblown issue affecting far less than 1% of vehicles, predominantly those that are heavily tuned…
The verdict
The Audi RS5 is the better choice for most buyers.
It has better fuel economy on its best-equipped version than the BMW M3, based on the data above. If power matters more to you than running costs, the BMW M3 is worth a closer look instead.
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Frequently asked questions
Which is more reliable, the Audi RS5 or the BMW M3?
Owner reports show similar reliability sentiment for the Audi RS5 and the BMW M3. Check the known issues listed above for specific differences between the two.
Which is better for families, the Audi RS5 or the BMW M3?
Both seat a similar number of passengers based on our data. The Audi RS5 is classed as a Fastback, the BMW M3 as a Station wagon, which affects cargo space and ride height for family use.
Which has better fuel economy, the Audi RS5 or the BMW M3?
The Audi RS5 is more fuel-efficient on paper: 9.7-9.8 L/100km combined versus 10.5 L/100km for the BMW M3, based on the best-equipped catalogued version of each.
Which is cheaper to maintain, the Audi RS5 or the BMW M3?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Audi RS5 than the BMW M3. See the known issues comparison above.