Porsche 911 vs Aston Martin DB11
The Porsche 911 is the more efficient of the two: it reaches 25 mpg combined versus 20 mpg for the Aston Martin DB11, a 5 mpg advantage and costs about $750 less per year to fuel.
Across 5 measured categories, the Porsche 911 leads in 5. Figures are EPA test data, not manufacturer claims.
2017–2023
Aston Martin DB11
Minicompact Cars · 13 configurations
Head-to-head specifications
| Metric | Porsche 911 | Aston Martin DB11 |
|---|---|---|
| Best combined MPG | 25 mpg ✓ | 20 mpg |
| Best city MPG | 22 mpg ✓ | 18 mpg |
| Best highway MPG | 30 mpg ✓ | 24 mpg |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $3,050 ✓ | $3,800 |
| Lowest CO2 output | 355 g/mi ✓ | 431 g/mi |
| Engines offered | SIDI | SIDI, 5.2, 4.0 |
| Transmissions | Automatic (AM-S8), Manual 6-spd, Automatic (AM-S7) | Automatic 8-spd, Automatic (S8) |
| Drivetrains | Rear-Wheel Drive, All-Wheel Drive, 4-Wheel Drive | Rear-Wheel Drive |
| Fuel types | Premium | Premium |
| EPA class | Minicompact Cars | Minicompact Cars |
| Years covered | 2015–2026 | 2017–2023 |
| Configurations on record | 361 | 13 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
911 vs DB11: common questions
Which is better on gas, the Porsche 911 or the Aston Martin DB11?
The Porsche 911 is the more efficient of the two: it reaches 25 mpg combined versus 20 mpg for the Aston Martin DB11, a 5 mpg advantage and costs about $750 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the Porsche 911 runs about $3,050 a year in fuel at its most efficient configuration, versus about $3,800 for the Aston Martin DB11 — a difference of roughly $750 per year.
What engines do the 911 and DB11 offer?
Porsche 911: SIDI. Aston Martin DB11: SIDI, 5.2, 4.0.
Are they in the same vehicle class?
Yes — the EPA classifies both the Porsche 911 and the Aston Martin DB11 as Minicompact Cars, so they compete directly.
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Comparison id: porsche-911-vs-aston-martin-db11