Hyundai Sonata vs Toyota Prius Prime: Specs Compared
Also searched as Toyota Prius Prime vs Hyundai Sonata specs — both orientations show this same side-by-side comparison.
The Toyota Prius Prime is the more efficient of the two: it reaches 54 mpg combined versus 52 mpg for the Hyundai Sonata, a 2 mpg advantage and costs about $50 less per year to fuel.
Across 5 measured categories, the Toyota Prius Prime leads in 4. Figures are EPA test data, not manufacturer claims.
2017–2024
Toyota Prius Prime
Midsize Cars · 10 configurations
Head-to-head specifications
| Metric | Hyundai Sonata | Toyota Prius Prime |
|---|---|---|
| Best combined MPG | 52 mpg | 54 mpg ✓ |
| Best city MPG | 50 mpg | 55 mpg ✓ |
| Best highway MPG | 56 mpg ✓ | 53 mpg |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $1,200 | $1,150 ✓ |
| Lowest CO2 output | 100 g/mi | 50 g/mi ✓ |
| Engines offered | SIDI; Hybrid, SIDI & PFI, SIDI & PFI; with Stop-Start, SIDI & PFI; Stop-Start | SIDI & PFI; PHEV, PHEV |
| Transmissions | Automatic (AM-S6), Automatic (AM-S8), Automatic (S8) | Automatic (variable gear ratios) |
| Drivetrains | Front-Wheel Drive, All-Wheel Drive | Front-Wheel Drive |
| Fuel types | Regular, Regular Gas and Electricity | Regular Gas and Electricity |
| EPA class | Large Cars | Midsize Cars |
| Years covered | 2015–2027 | 2017–2024 |
| Configurations on record | 81 | 10 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
Hyundai Sonata vs Toyota Prius Prime dimensions and size
The Hyundai Sonata is 14.6 inches longer than the Toyota Prius Prime on a wheelbase 5.5 inches longer, and 169.8 lbs heavier. Both clear the roughly 200 inches of usable length in a standard single garage bay.
| Dimension | Hyundai Sonata (2026) | Toyota Prius Prime (2023) | Difference |
|---|---|---|---|
| Length | 193.3 in | 178.7 in | 14.6 in |
| Width (excl. mirrors) | 73.2 in | 69.3 in | 3.9 in |
| Height | 56.7 in | 57.9 in | 1.2 in |
| Wheelbase | 111.8 in | 106.3 in | 5.5 in |
| Curb weight | 3,534 lbs | 3,364 lbs | 170 lbs |
Width excludes mirrors; add 8–12 inches for mirrors out. Figures are for the newest model year on record for each vehicle. See both drawn to scale.
Hyundai Sonata vs Toyota Prius Prime: what the numbers mean
Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Toyota Prius Prime burns about $1,150 of fuel annually against $1,200 for the Hyundai Sonata. That $50 yearly gap compounds to roughly $250 over five years and $400 over eight — often more than the price difference between two trims of the same vehicle, and the single largest running-cost line item separating these two.
City versus highway split: the Toyota Prius Prime is the stronger commuter at 55 mpg city, while the Hyundai Sonata pulls ahead on the interstate at 56 mpg highway. If most of your driving is stop-and-go traffic the city figure is the one to weigh; for long-distance highway mileage the reverse is true, and the two vehicles effectively swap places depending on how you drive.
Powertrain choice: the Hyundai Sonata is recorded with 4 distinct engine configurations (SIDI; Hybrid, SIDI & PFI, SIDI & PFI; with Stop-Start), the Toyota Prius Prime with 2 (SIDI & PFI; PHEV, PHEV). Across 81 recorded Hyundai Sonata configurations and 10 for the Toyota Prius Prime, the wider the engine spread the more the real-world fuel efficiency depends on which version you actually buy, so check the specific model year and drivetrain rather than the headline number.
Drivetrain and class: the Hyundai Sonata is offered with Front-Wheel Drive, All-Wheel Drive, the Toyota Prius Prime with Front-Wheel Drive. All-wheel drive typically costs one to two mpg combined against the same vehicle in front- or rear-wheel drive, which is worth remembering when the gap between these two is small. The EPA classes them as Large Cars and Midsize Cars respectively — the class drives the interior volume, cargo space and passenger space each one is measured against.
Tailpipe emissions: at their cleanest configurations the Toyota Prius Prime emits 50 g/mile of CO2 versus 100 g/mile for the Hyundai Sonata. Emissions track fuel consumption almost exactly, so the cleaner vehicle here is also the cheaper one to fuel.
Sonata vs Prius Prime: common questions
Which is better on gas, the Hyundai Sonata or the Toyota Prius Prime?
The Toyota Prius Prime is the more efficient of the two: it reaches 54 mpg combined versus 52 mpg for the Hyundai Sonata, a 2 mpg advantage and costs about $50 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the Toyota Prius Prime runs about $1,150 a year in fuel at its most efficient configuration, versus about $1,200 for the Hyundai Sonata — a difference of roughly $50 per year.
What engines do the Sonata and Prius Prime offer?
Hyundai Sonata: SIDI; Hybrid, SIDI & PFI, SIDI & PFI; with Stop-Start, SIDI & PFI; Stop-Start. Toyota Prius Prime: SIDI & PFI; PHEV, PHEV.
Are they in the same vehicle class?
The EPA classifies the Hyundai Sonata as Large Cars and the Toyota Prius Prime as Midsize Cars, so they aren't a like-for-like match on size.
More Sonata comparisons
More Prius Prime comparisons
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