Aston Martin DB11 vs Porsche 911
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 | Aston Martin DB11 | Porsche 911 |
|---|---|---|
| Best combined MPG | 20 mpg | 25 mpg ✓ |
| Best city MPG | 18 mpg | 22 mpg ✓ |
| Best highway MPG | 24 mpg | 30 mpg ✓ |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $3,800 | $3,050 ✓ |
| Lowest CO2 output | 431 g/mi | 355 g/mi ✓ |
| Engines offered | SIDI, 5.2, 4.0 | SIDI |
| Transmissions | Automatic 8-spd, Automatic (S8) | Automatic (AM-S8), Manual 6-spd, Automatic (AM-S7) |
| Drivetrains | Rear-Wheel Drive | Rear-Wheel Drive, All-Wheel Drive, 4-Wheel Drive |
| Fuel types | Premium | Premium |
| EPA class | Minicompact Cars | Minicompact Cars |
| Years covered | 2017–2023 | 2015–2026 |
| Configurations on record | 13 | 361 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
DB11 vs 911: common questions
Which is better on gas, the Aston Martin DB11 or the Porsche 911?
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 DB11 and 911 offer?
Aston Martin DB11: SIDI, 5.2, 4.0. Porsche 911: SIDI.
Are they in the same vehicle class?
Yes — the EPA classifies both the Aston Martin DB11 and the Porsche 911 as Minicompact Cars, so they compete directly.
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Comparison id: aston-martin-db11-vs-porsche-911