DecodedCarsAston Martin DBX 707 vs Bentley Bentayga
2026 Aston Martin DBX 707 vs 2026 Bentley Bentayga — two standard SUVs compared on efficiency, size, safety and reliability.
The short version
The Bentley Bentayga is more fuel-efficient: 21 vs 17 MPG combined in its best version.
That works out to about $950 a year less in fuel for the Bentley Bentayga (EPA estimate, 15,000 miles).
Across all model years since 2005, the Aston Martin DBX 707 has had fewer recall campaigns (6 vs 16).
The two cars
The 2026 Aston Martin DBX 707 is a standard SUV offered with a 4.0L 8-cyl turbo engine and 4-wheel drive. EPA rates its most efficient version at 17 MPG combined (15 city / 20 highway), 15% worse than the 2026 standard SUV average of 20 MPG, for an estimated $4,850 a year in fuel.
The 2026 Bentley Bentayga is a standard SUV offered with 2 engines (3.0L 6-cyl turbo and 4.0L 8-cyl turbo), including a hybrid version and all-wheel drive. It measures about 202 inches long and 79 inches wide on a 118-inch wheelbase, with a curb weight of roughly 5,838 lb (Hybrid 4dr SUV).
Buying used? The 2023 DBX 707 and the 2024 Bentayga have the fewest problems in our data; avoid the 2021 Bentayga.
Basics
Efficiency
Performance & space
Safety & reliability
Interest
Green = clearly better. Prices are not included. How we calculate this →
Which one should you choose?
Choose the Aston Martin DBX 707 if…
- You put reliability history first (6 vs 16 recalls since 2005)
Choose the Bentley Bentayga if…
- You want lower fuel bills (21 vs 17 MPG)
- You want a hybrid or electric option
Pros & cons of each
2026 Aston Martin DBX 707
- Below-average fuel economyBest version gets 17 MPG combined, 15% below the 2026 standard SUV average of 20 MPG.
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
2026 Bentley Bentayga
- Plug-in hybrid version availableOffered as a plug-in hybrid as well as gas.
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
Full 2026 Aston Martin DBX 707 specs →Full 2026 Bentley Bentayga specs →Compare fuel costs for your driving →Compare size & garage fit →