2026 head-to-head · Midsize & Large SUV
2026 Aston Martin DBX 707 vs Bentley Bentayga
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
4WD · 4.0L 8-cyl turbo · 9-speed automatic · 17 MPG
AWD · 4.0L 8-cyl turbo · 8-speed automatic · 16 MPG
The 2026 Aston Martin DBX 707 is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $3,485 a year to fuel (17 MPG), versus $3,703 for the 2026 Bentley Bentayga (16 MPG). That's roughly $218 a year, or about $1,089 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- Aston Martin DBX 707
- Bentley Bentayga
Side by side
| Aston Martin DBX 707 | Bentley Bentayga | |
|---|---|---|
| $3,485 | Your annual fuel cost | $3,703 |
| 17 MPG | Combined efficiency | 16 MPG |
| 15 MPG | City | 14 MPG |
| 20 MPG | Highway | 21 MPG |
| 105 cu ft | Passenger volume | — |
| 29 cu ft | Cargo volume | — |
| 537 g/mi | Tailpipe CO₂ (g/mi) | 553 g/mi |
| 3/10 | EPA fuel economy score | 3/10 |
| 3/10 | EPA greenhouse gas score | 3/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 4.0L 8-cyl turbo | Engine / motor | 4.0L 8-cyl turbo |
| 9-speed automatic | Transmission | 8-speed automatic |
| 4WD | Drivetrain | AWD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
Aston Martin DBX 707 vs Bentley Bentayga across model years
- Aston Martin DBX 707
- Bentley Bentayga
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Among 91 2026 midsize & large SUVs, the Aston Martin DBX 707 ranks 85th and the Bentley Bentayga 86th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2026 Aston Martin DBX 707 or the 2026 Bentley Bentayga?
Measured by cost to drive, the Aston Martin DBX 707. The Aston Martin DBX 707 is rated 17 MPG combined and the Bentley Bentayga 16 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2026 Aston Martin DBX 707 vs. the Bentley Bentayga per year?
At 15,000 miles a year with $3.95/gal premium gas, about $3,485 for the Aston Martin DBX 707 and $3,703 for the Bentley Bentayga.
Aston Martin DBX 707 vs Bentley Bentayga in other years
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