Audi A3 vs Mercedes-Benz AMG GT
The Audi A3 is the more efficient of the two: it reaches 39 mpg combined versus 22 mpg for the Mercedes-Benz AMG GT, a 17 mpg advantage and costs about $1,550 less per year to fuel.
Across 5 measured categories, the Audi A3 leads in 5. Figures are EPA test data, not manufacturer claims.
2016–2027
Mercedes-Benz AMG GT
Two Seaters · 67 configurations
Head-to-head specifications
| Metric | Audi A3 | Mercedes-Benz AMG GT |
|---|---|---|
| Best combined MPG | 39 mpg ✓ | 22 mpg |
| Best city MPG | 37 mpg ✓ | 20 mpg |
| Best highway MPG | 41 mpg ✓ | 27 mpg |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $1,900 ✓ | $3,450 |
| Lowest CO2 output | 138 g/mi ✓ | 397 g/mi |
| Engines offered | SIDI, SIDI; Mild Hybrid, SIDI; PHEV, 2.0 | SIDI, SIDI; Mild Hybrid, SIDI; PHEV |
| Transmissions | Automatic (AM-S7), Automatic (AM-S6) | Automatic 9-spd, Automatic (AM7), Automatic (AM-S7) |
| Drivetrains | All-Wheel Drive, Front-Wheel Drive, 4-Wheel Drive | All-Wheel Drive, Rear-Wheel Drive, 4-Wheel Drive |
| Fuel types | Premium, Regular, Premium and Electricity | Premium, Premium and Electricity |
| EPA class | Subcompact Cars | Two Seaters |
| Years covered | 2015–2026 | 2016–2027 |
| Configurations on record | 36 | 67 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
A3 vs AMG GT: common questions
Which is better on gas, the Audi A3 or the Mercedes-Benz AMG GT?
The Audi A3 is the more efficient of the two: it reaches 39 mpg combined versus 22 mpg for the Mercedes-Benz AMG GT, a 17 mpg advantage and costs about $1,550 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the Audi A3 runs about $1,900 a year in fuel at its most efficient configuration, versus about $3,450 for the Mercedes-Benz AMG GT — a difference of roughly $1,550 per year.
What engines do the A3 and AMG GT offer?
Audi A3: SIDI, SIDI; Mild Hybrid, SIDI; PHEV, 2.0. Mercedes-Benz AMG GT: SIDI, SIDI; Mild Hybrid, SIDI; PHEV.
Are they in the same vehicle class?
The EPA classifies the Audi A3 as Subcompact Cars and the Mercedes-Benz AMG GT as Two Seaters, so they aren't a like-for-like match on size.
More A3 comparisons
Comparison id: audi-a3-vs-mercedes-benz-amg-gt