Audi S6 vs BMW M3
The Audi S6 carries more luggage, while the BMW M3 starts about $8,900 lower, returns better fuel economy and makes more power. Here is how the two compare on the numbers that decide most purchases.
| Measure | Audi S6 | BMW M3 |
|---|---|---|
| Price rangeOriginal sticker prices across all trims. | $70,900–$81,495 | $62,000–$76,000✓ |
| Years covered | 2015–2025 | 2015–2026 |
| Fuel economyBest figure quoted across the range. | 22 mpg | 26 mpg✓ |
| Power | 450 hp | 543 hp✓ |
| Cargo space | 14.1 cu ft✓ | 13 cu ft |
| Seats | 5 | 5 |
| Fuel types | Petrol | Petrol |
| Drivetrains | AWD, 4WD | RWD, AWD |
| Safety rating | — | Not rated |
| Reliability | — | — |
| Insurance (yr) | — | — |
| Resale value | — | — |
| Recalls | — | — |
Audi S6 vs BMW M3: common questions
Is the Audi S6 cheaper than the BMW M3?
No — the BMW M3 has the lower entry price. The Audi S6 spans $70,900–$81,495 and the BMW M3 spans $62,000–$76,000, based on original sticker prices across all trims.
Which is more fuel efficient, the Audi S6 or the BMW M3?
The BMW M3 is more efficient, quoting 26 mpg against 22 mpg for the other.
Which has more cargo space, the Audi S6 or the BMW M3?
The Audi S6 holds more, at 14.1 cubic feet versus 13.
Which should I buy, the Audi S6 or the BMW M3?
It depends on what you weight most. The Audi S6 carries more luggage, while the BMW M3 starts about $8,900 lower, returns better fuel economy and makes more power. Here is how the two compare on the numbers that decide most purchases. Cars4Real shows both cars' full trim tables, owner reviews, safety records and depreciation so you can judge against your own priorities rather than a generic verdict.