REAL MPG:
Audi A6 (2018 on)
000010
40–55
Real MPG
49.2
Average
Extremely comfortable and upmarket cabin. Lots of technology including mild hybrid system helping fuel economy.
Not the most daring styling, just more of the same. Unresponsive 8-speed torque converter auto with 3.0 V6 TDI.
Select engine for more Real MPG information:
| Engine | Official MPG | Real MPG Avg. | Real MPG % | |
| 40 TDI quattro S tronic | 61.4–64.2 mpg | - | - |  |
| 40 TDI S tronic | 60.1–62.8 mpg | 49.2 mpg | 80% | |
| 45 TFSI quattro S tronic | 42.2–42.8 mpg | - | - | |
| 50 TDI quattro S tronic | 49.6 mpg | - | - | |
| 50 TDI quattro tiptronic | 49.6–50.4 mpg | - | - | |
| 55 TFSI quattro S tronic | 38.2–39.2 mpg | - | - | |
| S6 | 44.8–45.6 mpg | - | - | |
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Audi A6 (2018 on)
Extremely comfortable and upmarket cabin. Lots of technology including mild hybrid system helping fuel economy.
Rivals
| Audi A6 (2018 on) | 49.2 | avg mpg |
| Volkswagen Arteon (2017 on) | 44.0 | avg mpg |
| BMW 5 Series (2017 on) | 43.8 | avg mpg |
| Jaguar F-Pace (2016 on) | 37.7 | avg mpg |
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