2027 head-to-head · Small SUV
2027 GMC Terrain vs Subaru Outback
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
The 2027 Subaru Outback is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas, it costs about $1,722 a year to fuel (27 MPG), versus $1,788 for the 2027 GMC Terrain (26 MPG). That's roughly $66 a year, or about $331 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
- GMC Terrain
- Subaru Outback
Side by side
| GMC Terrain | Subaru Outback | |
|---|---|---|
| $1,788 | Your annual fuel cost | $1,722 |
| 26 MPG | Combined efficiency | 27 MPG |
| 25 MPG | City | 25 MPG |
| 28 MPG | Highway | 31 MPG |
| 342 g/mi | Tailpipe CO₂ (g/mi) | 330 g/mi |
| 5/10 | EPA fuel economy score | 5/10 |
| 5/10 | EPA greenhouse gas score | 5/10 |
| Gas | Powertrain | Gas |
| Regular gasoline | Fuel | Regular gasoline |
| 1.5L 4-cyl turbo | Engine / motor | 2.5L 4-cyl |
| 8-speed automatic | Transmission | CVT |
| FWD | 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.
GMC Terrain vs Subaru Outback across model years
- GMC Terrain
- Subaru Outback
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 48 2027 small SUVs, the GMC Terrain ranks 34th and the Subaru Outback 32nd for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2027 GMC Terrain or the 2027 Subaru Outback?
Measured by cost to drive, the Subaru Outback. The GMC Terrain is rated 26 MPG combined and the Subaru Outback 27 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2027 GMC Terrain vs. the Subaru Outback per year?
At 15,000 miles a year with $3.10/gal regular gas, about $1,788 for the GMC Terrain and $1,722 for the Subaru Outback.
GMC Terrain vs Subaru Outback in other years
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