2018 head-to-head · Large Car
2018 Buick Regal vs Kia K900
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 2018 Buick Regal is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas, it costs about $2,114 a year to fuel (22 MPG), versus $2,325 for the 2018 Kia K900 (20 MPG). That's roughly $211 a year, or about $1,057 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
- Buick Regal
- Kia K900
Side by side
| Buick Regal | Kia K900 | |
|---|---|---|
| $2,114 | Your annual fuel cost | $2,325 |
| 22 MPG | Combined efficiency | 20 MPG |
| 19 MPG | City | 17 MPG |
| 27 MPG | Highway | 25 MPG |
| 98 cu ft | Passenger volume | 110 cu ft |
| 25 cu ft | Cargo volume | 16 cu ft |
| 403 g/mi | Tailpipe CO₂ (g/mi) | 448 g/mi |
| 4/10 | EPA fuel economy score | 4/10 |
| 4/10 | EPA greenhouse gas score | 4/10 |
| Gas | Powertrain | Gas |
| Regular gasoline | Fuel | Regular gasoline |
| 3.6L 6-cyl | Engine / motor | 3.8L 6-cyl |
| 9-speed automatic | Transmission | 8-speed automatic |
| AWD | 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.
Buick Regal vs Kia K900 across model years
- Buick Regal
- Kia K900
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 K900 has more passenger space (110 vs. 98 cu ft); the Buick Regal has more cargo space (25 vs. 16 cu ft).
Among 31 2018 large cars, the Buick Regal ranks 14th and the Kia K900 22nd for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2018 Buick Regal or the 2018 Kia K900?
Measured by cost to drive, the Buick Regal. The Buick Regal is rated 22 MPG combined and the Kia K900 20 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2018 Buick Regal vs. the Kia K900 per year?
At 15,000 miles a year with $3.10/gal regular gas, about $2,114 for the Buick Regal and $2,325 for the Kia K900.
Which has more cargo space?
The Buick Regal, with 25 cu ft of luggage volume versus 16 cu ft (EPA interior volume index).
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