A8 vs AMG GT 4-Door
Two makers, one class, one decision: the A8 from Audi or the AMG GT 4-Door from Mercedes-Benz. The data points to two closely matched options rather than a clear favorite.
At a glance
- Fuel Economy & Range A8 wins
- Off-road & Towing Tie
- Fuel Economy & Range1.3
- 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
-
The A8 has better highway fuel economy
Slight advantage to the A8: 26 mpg compared with 24 mpg. Speed, wind and load affect highway use a lot, but the official rating is a fair comparison point.
-
The A8 has better city fuel economy
On fuel economy (city), the A8 edges out the AMG GT 4-Door, 20 mpg to 19 mpg. In town, driving style has a big effect, but the A8 starts from a better baseline.
Design & Size
Engine & Performance
This area doesn’t reduce to a single number. The table shows the engine & performance details for both, so you can judge what matters to you.
Fuel Economy & Range
A8 leads
If you’re keeping score, the fuel economy & range point goes narrowly to the A8. Here the A8 offers better highway fuel economy. Highway fuel economy matters if you cover long distances at steady speeds. If fuel economy & range is your priority, the A8 is the car to pick.
Fuel economy (highway)
A8: 26 mpg AMG GT 4-Door: 24 mpg The A8 uses less fuel on the highway, a real saving on road trips and long commutes.
Fuel economy (city)
A8: 20 mpg AMG GT 4-Door: 19 mpg Hybrids often shine in the city, and the A8 has the better rating here.
Off-road & Towing
Too close to call
Swap one for the other and you’d lose nothing on off-road & towing. Either car will serve you equally well on off-road & towing.
Safety & Tech
In the safety & tech section, the key entries are names rather than numbers, so compare what the A8 and the AMG GT 4-Door list in the table below.
Full Specifications
Engine & Performance
| Spec | A8 | AMG GT 4-Door |
|---|---|---|
| Powertrain | Gas (48V mild hybrid) | Gas (48V mild hybrid) |
| Engine | 3.0L turbo V6 | 3.0L turbo I6 |
| Total system output | 335 hp | N/A (not specified) |
| Torque | 369 lb-ft | N/A (not specified) |
| Transmission | 8-speed automatic | 9-speed automatic (AMG MCT) |
| Drivetrain | AWD (quattro) | AWD (4MATIC+) |
Fuel Economy & Range
| Spec | A8 | AMG GT 4-Door |
|---|---|---|
| Fuel economy (combined)EPA estimate where available | 22 mpg | 21 mpg |
| Fuel economy (city) | 20 mpg (winner) | 19 mpg |
| Fuel economy (highway) | 26 mpg (winner) | 24 mpg Thirstiest on the highway |
Space & Practicality
| Spec | A8 | AMG GT 4-Door |
|---|---|---|
| Seats | 5 seats | N/A (not specified) |
Off-road & Towing
| Spec | A8 | AMG GT 4-Door |
|---|---|---|
| AWD / 4WD available | Yes | Yes |
Safety & Tech
| Spec | A8 | 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 A8 if…
- you want better highway fuel economy (26 mpg vs 24 mpg)
- you mostly drive in town (20 mpg vs 19 mpg in the city)
- you already use other Audi products
Also Compared
Frequently Asked Questions
Should I buy the A8 or the AMG GT 4-Door?
On the specs compared here, the A8 makes more sense for most buyers; the AMG GT 4-Door doesn’t win a single measurable area.
Executive Summary
I read both spec sheets (the A8’s and the AMG GT 4-Door’s) so you don’t have to. Here’s what matters most to me: the A8 offers better highway fuel economy.
For fuel economy & range, the A8 fits better. For the things a spec sheet can’t capture, the AMG GT 4-Door is the better match.
My pick: the A8.
Personal opinion based on the data above. Your priorities may differ.