2018 head-to-head · Midsize Car
2018 Hyundai Ioniq Plug-in Hybrid vs Toyota Prius Prime
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
FWD · 1.6L 4-cyl · 6-speed dual-clutch · 119 MPGe + 52 MPG
FWD · 1.8L 4-cyl · CVT · 133 MPGe + 54 MPG
On fuel costs these two are nearly tied. Driving 15,000 miles a year with 18¢/kWh electricity and $3.10/gal regular gas, the most efficient 2018 Hyundai Ioniq Plug-in Hybrid (119 MPGe + 52 MPG) costs about $815 a year to fuel and the 2018 Toyota Prius Prime (133 MPGe + 54 MPG) about $763.
Your numbers
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Fuel cost over 10 years
- Hyundai Ioniq Plug-in Hybrid
- Toyota Prius Prime
Side by side
| Hyundai Ioniq Plug-in Hybrid | Toyota Prius Prime | |
|---|---|---|
| $815 | Your annual fuel cost | $763 |
| 119 MPGe + 52 MPG | Combined efficiency | 133 MPGe + 54 MPG |
| 123 MPGe / 53 MPG | City | 145 MPGe / 55 MPG |
| 114 MPGe / 52 MPG | Highway | 121 MPGe / 53 MPG |
| 28 kWh | Electricity use (kWh/100 mi) | 25 kWh |
| 630 mi | Driving range | 640 mi |
| 29 mi | All-electric range | 25 mi |
| 96 cu ft | Passenger volume | 91 cu ft |
| 23 cu ft | Cargo volume | 20 cu ft |
| 75 g/mi | Tailpipe CO₂ (g/mi) | 78 g/mi |
| 10/10 | EPA fuel economy score | 10/10 |
| 10/10 | EPA greenhouse gas score | 10/10 |
| 2.3 hrs | Charge time at 240V | 2 hrs |
| Plug-in hybrid | Powertrain | Plug-in hybrid |
| Regular gas + electricity | Fuel | Regular gas + electricity |
| 1.6L 4-cyl | Engine / motor | 1.8L 4-cyl |
| 6-speed dual-clutch | 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.
Hyundai Ioniq Plug-in Hybrid vs Toyota Prius Prime across model years
- Hyundai Ioniq Plug-in Hybrid
- Toyota Prius Prime
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
The Toyota Prius Prime goes farther between stops: about 640 miles on a full tank and charge, compared with 630 miles for the Hyundai Ioniq Plug-in Hybrid.
Per EPA interior volume figures, the Hyundai Ioniq Plug-in Hybrid has more passenger space (96 vs. 91 cu ft); the Hyundai Ioniq Plug-in Hybrid has more cargo space (23 vs. 20 cu ft).
Among 74 2018 midsize cars, the Hyundai Ioniq Plug-in Hybrid ranks 6th and the Toyota Prius Prime 3rd for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2018 Hyundai Ioniq Plug-in Hybrid or the 2018 Toyota Prius Prime?
Measured by cost to drive, the Toyota Prius Prime. The Hyundai Ioniq Plug-in Hybrid is rated 119 MPGe + 52 MPG combined and the Toyota Prius Prime 133 MPGe + 54 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2018 Hyundai Ioniq Plug-in Hybrid vs. the Toyota Prius Prime per year?
At 15,000 miles a year with 18¢/kWh electricity and $3.10/gal regular gas, about $815 for the Hyundai Ioniq Plug-in Hybrid and $763 for the Toyota Prius Prime.
Which has more range?
The Toyota Prius Prime: about 640 miles versus 630 miles.
Which has more cargo space?
The Hyundai Ioniq Plug-in Hybrid, with 23 cu ft of luggage volume versus 20 cu ft (EPA interior volume index).
Hyundai Ioniq Plug-in Hybrid vs Toyota Prius Prime in other years
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