2015 head-to-head · Midsize Car
2015 Kia Optima vs Roush Performance Mustang
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 2015 Kia Optima is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas and $3.95/gal premium gas, it costs about $1,788 a year to fuel (26 MPG), versus $3,703 for the 2015 Roush Performance Mustang (16 MPG). That's roughly $1,915 a year, or about $9,573 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 Optima
- Roush Performance Mustang
Side by side
| Kia Optima | Roush Performance Mustang | |
|---|---|---|
| $1,788 | Your annual fuel cost | $3,703 |
| 26 MPG | Combined efficiency | 16 MPG |
| 23 MPG | City | 13 MPG |
| 33 MPG | Highway | 23 MPG |
| 102 cu ft | Passenger volume | 98 cu ft |
| 15 cu ft | Cargo volume | 13 cu ft |
| 334 g/mi | Tailpipe CO₂ (g/mi) | 553 g/mi |
| 7/10 | EPA fuel economy score | 3/10 |
| 7/10 | EPA greenhouse gas score | 3/10 |
| Gas | Powertrain | Gas |
| Regular gasoline | Fuel | Premium gasoline |
| 2.4L 4-cyl | Engine / motor | 5.0L 8-cyl supercharged |
| 6-speed automatic | Transmission | 6-speed automatic |
| FWD | Drivetrain | RWD |
✓ 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 Optima vs Roush Performance Mustang across model years
- Kia Optima
- Roush Performance Mustang
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 Kia Optima has more passenger space (102 vs. 98 cu ft); the Kia Optima has more cargo space (15 vs. 13 cu ft).
Among 69 2015 midsize cars, the Kia Optima ranks 33rd and the Roush Performance Mustang 66th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2015 Kia Optima or the 2015 Roush Performance Mustang?
Measured by cost to drive, the Kia Optima. The Kia Optima is rated 26 MPG combined and the Roush Performance Mustang 16 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2015 Kia Optima vs. the Roush Performance Mustang per year?
At 15,000 miles a year with $3.10/gal regular gas and $3.95/gal premium gas, about $1,788 for the Kia Optima and $3,703 for the Roush Performance Mustang.
Which has more cargo space?
The Kia Optima, with 15 cu ft of luggage volume versus 13 cu ft (EPA interior volume index).
More 2015 comparisons
Kia Optima vs…
Or compare the 2015 Kia Optima with anything else: