Audi S5 vs BMW 6 Series
The BMW 6 Series is the more efficient of the two: it reaches 25 mpg combined versus 24 mpg for the Audi S5, a 1 mpg advantage and costs about $100 less per year to fuel.
Across 4 measured categories, the BMW 6 Series leads in 4. Figures are EPA test data, not manufacturer claims.
Head-to-head specifications
| Metric | Audi S5 | BMW 6 Series |
|---|---|---|
| Best combined MPG | 24 mpg | 25 mpg ✓ |
| Best city MPG | 21 mpg | 21 mpg |
| Best highway MPG | 30 mpg | 31 mpg ✓ |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $3,150 | $3,050 ✓ |
| Lowest CO2 output | 363 g/mi | 361 g/mi ✓ |
| Engines offered | SIDI | SIDI |
| Transmissions | Automatic (AM-S7), Automatic (S8), Automatic (AM-S8) | Automatic (S8) |
| Drivetrains | All-Wheel Drive, 4-Wheel Drive | Rear-Wheel Drive, All-Wheel Drive |
| Fuel types | Premium | Premium |
| EPA class | Subcompact Cars | Subcompact Cars |
| Years covered | 2015–2026 | 2015–2019 |
| Configurations on record | 33 | 55 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
S5 vs 6 Series: common questions
Which is better on gas, the Audi S5 or the BMW 6 Series?
The BMW 6 Series is the more efficient of the two: it reaches 25 mpg combined versus 24 mpg for the Audi S5, a 1 mpg advantage and costs about $100 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the BMW 6 Series runs about $3,050 a year in fuel at its most efficient configuration, versus about $3,150 for the Audi S5 — a difference of roughly $100 per year.
What engines do the S5 and 6 Series offer?
Audi S5: SIDI. BMW 6 Series: SIDI.
Are they in the same vehicle class?
Yes — the EPA classifies both the Audi S5 and the BMW 6 Series as Subcompact Cars, so they compete directly.
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Comparison id: audi-s5-vs-bmw-6-series