2027 head-to-head · Midsize & Large SUV
2027 Audi Q8 vs Mercedes-Benz GLS-Class Hybrid
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
AWD · 3.0L 6-cyl turbo · 8-speed automatic · 19 MPG
AWD · 3.0L 6-cyl turbo · 9-speed automatic · 21 MPG
The 2027 Mercedes-Benz GLS-Class Hybrid is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,821 a year to fuel (21 MPG), versus $3,118 for the 2027 Audi Q8 (19 MPG). That's roughly $297 a year, or about $1,485 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
- Audi Q8
- Mercedes-Benz GLS-Class Hybrid
Side by side
| Audi Q8 | Mercedes-Benz GLS-Class Hybrid | |
|---|---|---|
| $3,118 | Your annual fuel cost | $2,821 |
| 19 MPG | Combined efficiency | 21 MPG |
| 17 MPG | City | 19 MPG |
| 23 MPG | Highway | 24 MPG |
| 459 g/mi | Tailpipe CO₂ (g/mi) | 424 g/mi |
| 4/10 | EPA fuel economy score | 4/10 |
| 4/10 | EPA greenhouse gas score | 4/10 |
| Hybrid | Powertrain | Hybrid |
| Premium gasoline | Fuel | Premium gasoline |
| 3.0L 6-cyl turbo | Engine / motor | 3.0L 6-cyl turbo |
| 8-speed automatic | Transmission | 9-speed automatic |
| AWD | 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.
Audi Q8 vs Mercedes-Benz GLS-Class Hybrid across model years
- Audi Q8
- Mercedes-Benz GLS-Class Hybrid
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 58 2027 midsize & large SUVs, the Audi Q8 ranks 49th and the Mercedes-Benz GLS-Class Hybrid 48th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2027 Audi Q8 or the 2027 Mercedes-Benz GLS-Class Hybrid?
Measured by cost to drive, the Mercedes-Benz GLS-Class Hybrid. The Audi Q8 is rated 19 MPG combined and the Mercedes-Benz GLS-Class Hybrid 21 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2027 Audi Q8 vs. the Mercedes-Benz GLS-Class Hybrid per year?
At 15,000 miles a year with $3.95/gal premium gas, about $3,118 for the Audi Q8 and $2,821 for the Mercedes-Benz GLS-Class Hybrid.
Audi Q8 vs Mercedes-Benz GLS-Class Hybrid in other years
More 2027 comparisons
Audi Q8 vs…
Or compare the 2027 Audi Q8 with anything else: