BMW 6 Series vs Audi S5
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 | BMW 6 Series | Audi S5 |
|---|---|---|
| Best combined MPG | 25 mpg ✓ | 24 mpg |
| Best city MPG | 21 mpg | 21 mpg |
| Best highway MPG | 31 mpg ✓ | 30 mpg |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $3,050 ✓ | $3,150 |
| Lowest CO2 output | 361 g/mi ✓ | 363 g/mi |
| Engines offered | SIDI | SIDI |
| Transmissions | Automatic (S8) | Automatic (AM-S7), Automatic (S8), Automatic (AM-S8) |
| Drivetrains | Rear-Wheel Drive, All-Wheel Drive | All-Wheel Drive, 4-Wheel Drive |
| Fuel types | Premium | Premium |
| EPA class | Subcompact Cars | Subcompact Cars |
| Years covered | 2015–2019 | 2015–2026 |
| Configurations on record | 55 | 33 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
6 Series vs S5: common questions
Which is better on gas, the BMW 6 Series or the Audi S5?
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 6 Series and S5 offer?
BMW 6 Series: SIDI. Audi S5: SIDI.
Are they in the same vehicle class?
Yes — the EPA classifies both the BMW 6 Series and the Audi S5 as Subcompact Cars, so they compete directly.
More 6 Series comparisons
Comparison id: bmw-6-series-vs-audi-s5