2027 head-to-head · Midsize Car
2027 Kia K4 vs Toyota Prius
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 Toyota Prius is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas, it costs about $845 a year to fuel (55 MPG), versus $1,409 for the 2027 Kia K4 (33 MPG). That's roughly $564 a year, or about $2,818 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 K4
- Toyota Prius
Side by side
| Kia K4 | Toyota Prius | |
|---|---|---|
| $1,409 | Your annual fuel cost | $845 |
| 33 MPG | Combined efficiency | 55 MPG |
| 29 MPG | City | 59 MPG |
| 39 MPG | Highway | 50 MPG |
| 99 cu ft | Passenger volume | 91 cu ft |
| 15 cu ft | Cargo volume | 24 cu ft |
| 269 g/mi | Tailpipe CO₂ (g/mi) | 148 g/mi |
| 6/10 | EPA fuel economy score | 8/10 |
| 6/10 | EPA greenhouse gas score | 8/10 |
| Gas | Powertrain | Hybrid |
| Regular gasoline | Fuel | Regular gasoline |
| 2.0L 4-cyl | Engine / motor | 2.0L 4-cyl |
| CVT | Transmission | CVT |
| FWD | 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 K4 vs Toyota Prius across model years
- Kia K4
- Toyota Prius
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 K4 has more passenger space (99 vs. 91 cu ft); the Toyota Prius has more cargo space (24 vs. 15 cu ft).
Among 12 2027 midsize cars, the Kia K4 ranks 5th and the Toyota Prius 2nd for lowest fuel cost.
The powertrains differ: the Kia K4 is a conventional gas model, while the Toyota Prius is a full hybrid.
Frequently asked questions
Which is more fuel-efficient, the 2027 Kia K4 or the 2027 Toyota Prius?
Measured by cost to drive, the Toyota Prius. The Kia K4 is rated 33 MPG combined and the Toyota Prius 55 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2027 Kia K4 vs. the Toyota Prius per year?
At 15,000 miles a year with $3.10/gal regular gas, about $1,409 for the Kia K4 and $845 for the Toyota Prius.
Which has more cargo space?
The Toyota Prius, with 24 cu ft of luggage volume versus 15 cu ft (EPA interior volume index).
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