2021 head-to-head · Midsize Car
2021 Kia Stinger vs Mazda 6
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 2021 Mazda 6 is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas and $3.10/gal regular gas, it costs about $1,603 a year to fuel (29 MPG), versus $2,370 for the 2021 Kia Stinger (25 MPG). That's roughly $767 a year, or about $3,833 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
- Kia Stinger
- Mazda 6
Side by side
| Kia Stinger | Mazda 6 | |
|---|---|---|
| $2,370 | Your annual fuel cost | $1,603 |
| 25 MPG | Combined efficiency | 29 MPG |
| 22 MPG | City | 26 MPG |
| 29 MPG | Highway | 35 MPG |
| 95 cu ft | Passenger volume | 100 cu ft |
| 23 cu ft | Cargo volume | 15 cu ft |
| 365 g/mi | Tailpipe CO₂ (g/mi) | 302 g/mi |
| 5/10 | EPA fuel economy score | 6/10 |
| 5/10 | EPA greenhouse gas score | 6/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Regular gasoline |
| 2.0L 4-cyl turbo | Engine / motor | 2.5L 4-cyl |
| 8-speed automatic | Transmission | 6-speed automatic |
| RWD | Drivetrain | FWD |
✓ 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.
Kia Stinger vs Mazda 6 across model years
- Kia Stinger
- Mazda 6
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
Per EPA interior volume figures, the Mazda 6 has more passenger space (100 vs. 95 cu ft); the Kia Stinger has more cargo space (23 vs. 15 cu ft).
Among 54 2021 midsize cars, the Kia Stinger ranks 42nd and the Mazda 6 23rd for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2021 Kia Stinger or the 2021 Mazda 6?
Measured by cost to drive, the Mazda 6. The Kia Stinger is rated 25 MPG combined and the Mazda 6 29 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2021 Kia Stinger vs. the Mazda 6 per year?
At 15,000 miles a year with $3.95/gal premium gas and $3.10/gal regular gas, about $2,370 for the Kia Stinger and $1,603 for the Mazda 6.
Which has more cargo space?
The Kia Stinger, with 23 cu ft of luggage volume versus 15 cu ft (EPA interior volume index).
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