2026 head-to-head · Midsize & Large SUV
2026 Audi RS Q8 vs Lexus GX
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 · 4.0L 8-cyl turbo · 8-speed automatic · 16 MPG
4WD · 3.4L 6-cyl turbo · 10-speed automatic · 17 MPG
The 2026 Lexus GX 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 Audi RS Q8 (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
- Audi RS Q8
- Lexus GX
Side by side
| Audi RS Q8 | Lexus GX | |
|---|---|---|
| $3,703 | Your annual fuel cost | $3,485 |
| 16 MPG | Combined efficiency | 17 MPG |
| 14 MPG | City | 15 MPG |
| 20 MPG | Highway | 21 MPG |
| 547 g/mi | Tailpipe CO₂ (g/mi) | 505 g/mi |
| 3/10 | EPA fuel economy score | 3/10 |
| 3/10 | EPA greenhouse gas score | 3/10 |
| Hybrid | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 4.0L 8-cyl turbo | Engine / motor | 3.4L 6-cyl turbo |
| 8-speed automatic | Transmission | 10-speed automatic |
| AWD | Drivetrain | 4WD |
✓ 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 RS Q8 vs Lexus GX across model years
- Audi RS Q8
- Lexus GX
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 Audi RS Q8 ranks 87th and the Lexus GX 84th for lowest fuel cost.
The powertrains differ: the Audi RS Q8 is a full hybrid, while the Lexus GX is a conventional gas model.
Frequently asked questions
Which is more fuel-efficient, the 2026 Audi RS Q8 or the 2026 Lexus GX?
Measured by cost to drive, the Lexus GX. The Audi RS Q8 is rated 16 MPG combined and the Lexus GX 17 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2026 Audi RS Q8 vs. the Lexus GX per year?
At 15,000 miles a year with $3.95/gal premium gas, about $3,703 for the Audi RS Q8 and $3,485 for the Lexus GX.
Audi RS Q8 vs Lexus GX in other years
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