A6 vs AMG GT 4-Door
Choosing between Audi and Mercedes-Benz often comes down to a specific pair of products. In the midsize luxury car class, that pair is the A6 and the AMG GT 4-Door. Here the verdict on paper is fairly clear. The A6 takes 1 of 2 areas against the AMG GT 4-Door, starting with fuel economy & range.
At a glance
- Fuel Economy & Range A6 wins
- Off-road & Towing Tie
- Fuel Economy & Range4.0
- Fuel Economy & Range0.3
Spec scores (0 to 10) are calculated from manufacturer specs against other models in the same class. See how the formula works. They are not reviews or user ratings.
Key Differences
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The A6 has better fuel economy
When it comes to fuel economy (combined), the A6 wins comfortably with 26 mpg against 21 mpg. Better combined fuel economy lowers your running costs every week, and the savings add up over years of ownership.
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The A6 has better highway fuel economy
It’s a lopsided result (31 mpg for the A6, 24 mpg for the AMG GT 4-Door) and one of the main reasons to choose between them. Highway fuel economy matters if you cover long distances at steady speeds.
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The A6 has better city fuel economy
The spread here is large: 24 mpg on the A6 versus 19 mpg on the AMG GT 4-Door. Expect to notice it. In town, driving style has a big effect, but the A6 starts from a better baseline.
Design & Size
Engine & Performance
In the engine & performance section, the key entries are names rather than numbers, so compare what the A6 and the AMG GT 4-Door list in the table below.
Fuel Economy & Range
A6 leads
The fuel economy & range numbers point firmly in one direction: toward the A6. The A6 scores with better fuel economy. The A6 uses less fuel on the standard combined cycle, which matters most if you drive a lot. Anyone shopping mainly on fuel economy & range should start with the A6.
Fuel economy (combined)
A6: 26 mpg AMG GT 4-Door: 21 mpg Official figures rarely match real-world driving exactly, but the ranking between two cars tends to hold.
Fuel economy (highway)
A6: 31 mpg AMG GT 4-Door: 24 mpg The A6 uses less fuel on the highway, a real saving on road trips and long commutes.
Off-road & Towing
Too close to call
On paper, the off-road & towing comparison ends all square. On off-road & towing alone, you can’t go far wrong with either.
Safety & Tech
This section is descriptive. The A6 and the AMG GT 4-Door list different components for safety & tech, and the table spells them out.
Full Specifications
Engine & Performance
| Spec | A6 | AMG GT 4-Door |
|---|---|---|
| Powertrain | Gas (12V mild hybrid) | Gas (48V mild hybrid) |
| Engine | 2.0L turbo I4 | 3.0L turbo I6 |
| Total system output | 261 hp | N/A (not specified) |
| Torque | 273 lb-ft Least torque in class | N/A (not specified) |
| Transmission | 7-speed dual-clutch (S tronic) | 9-speed automatic (AMG MCT) |
| Drivetrain | AWD (quattro) | AWD (4MATIC+) |
Fuel Economy & Range
| Spec | A6 | AMG GT 4-Door |
|---|---|---|
| Fuel economy (combined)EPA estimate where available | 26 mpg (winner) | 21 mpg |
| Fuel economy (city) | 24 mpg (winner) | 19 mpg |
| Fuel economy (highway) | 31 mpg (winner) | 24 mpg Thirstiest on the highway |
Space & Practicality
| Spec | A6 | AMG GT 4-Door |
|---|---|---|
| Seats | 5 seats | N/A (not specified) |
Off-road & Towing
| Spec | A6 | AMG GT 4-Door |
|---|---|---|
| AWD / 4WD available | Yes | Yes |
Safety & Tech
| Spec | A6 | AMG GT 4-Door |
|---|---|---|
| Basic warranty | 4 yr / 50,000 mi | 4 yr / 50,000 mi |
“N/A” means the manufacturer does not specify the value or we could not confirm it. Figures marked “manufacturer rating” are the maker’s own claims, not our measurements.
Which One Should You Buy?
Choose the A6 if…
- you drive a lot and want lower running costs (26 mpg vs 21 mpg combined)
- you want better highway fuel economy (31 mpg vs 24 mpg)
- you want better city fuel economy (24 mpg vs 19 mpg)
Choose the AMG GT 4-Door if…
- you already know your way around Mercedes-Benz’s products
Also Compared
Frequently Asked Questions
Which is better for most people, the A6 or the AMG GT 4-Door?
On the specs compared here, the A6 makes more sense for most buyers; the AMG GT 4-Door doesn’t win a single measurable area.
Executive Summary
Two companies, two answers to the same question. That’s how I see the A6 from Audi and the AMG GT 4-Door from Mercedes-Benz. Start with the headline difference (the A6 has better fuel economy), and a lot of the decision falls into place. A second point goes to the A6 for better city fuel economy.
The A6 is for you if fuel economy & range tops your list; the AMG GT 4-Door is for you if the things a spec sheet can’t capture does.
My pick: the A6.
Personal opinion based on the data above. Your priorities may differ.