Genesis G80 vs Toyota Mirai: Specs Compared
Also searched as Toyota Mirai vs Genesis G80 specs — both orientations show this same side-by-side comparison.
The Genesis G80 is the more efficient of the two: it reaches 97 mpg combined versus 74 mpg for the Toyota Mirai, a 23 mpg advantage.
Across 3 measured categories, the Genesis G80 leads in 3. Figures are EPA test data, not manufacturer claims.
Head-to-head specifications
| Metric | Genesis G80 | Toyota Mirai |
|---|---|---|
| Best combined MPG | 97 mpg ✓ | 74 mpg |
| Best city MPG | 105 mpg ✓ | 76 mpg |
| Best highway MPG | 93 mpg ✓ | 71 mpg |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $750 | Not available |
| Lowest CO2 output | 345 g/mi | Not available |
| Engines offered | SIDI & PFI, SIDI | PEFC |
| Transmissions | Automatic (S8), Automatic (A1) | Automatic (variable gear ratios) |
| Drivetrains | All-Wheel Drive, Rear-Wheel Drive | Rear-Wheel Drive, Front-Wheel Drive |
| Fuel types | Premium, Electricity, Regular | Hydrogen |
| EPA class | Large Cars | Compact Cars |
| Years covered | 2017–2027 | 2016–2026 |
| Configurations on record | 43 | 17 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
Genesis G80 vs Toyota Mirai dimensions and size
The Genesis G80 is 0.8 inches longer than the Toyota Mirai on a wheelbase 3.5 inches longer, and 39.7 lbs heavier. Both clear the roughly 200 inches of usable length in a standard single garage bay.
| Dimension | Genesis G80 (2026) | Toyota Mirai (2026) | Difference |
|---|---|---|---|
| Length | 196.5 in | 195.7 in | 0.8 in |
| Width (excl. mirrors) | 75.6 in | 74 in | 1.6 in |
| Height | 57.9 in | 57.9 in | identical |
| Wheelbase | 118.5 in | 115 in | 3.5 in |
| Curb weight | 4,295 lbs | 4,255 lbs | 40 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.
Genesis G80 vs Toyota Mirai: what the numbers mean
City and highway economy: the Genesis G80 leads in both cycles — 105 mpg city and 93 mpg highway against 76 and 71 mpg — so its fuel-efficiency advantage holds whether you commute in traffic or cover long highway miles.
Powertrain choice: the Genesis G80 is recorded with 2 distinct engine configurations (SIDI & PFI, SIDI), the Toyota Mirai with 1 (PEFC). Across 43 recorded Genesis G80 configurations and 17 for the Toyota Mirai, 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 Genesis G80 is offered with All-Wheel Drive, Rear-Wheel Drive, the Toyota Mirai with Rear-Wheel Drive, 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 Compact Cars respectively — the class drives the interior volume, cargo space and passenger space each one is measured against.
G80 vs Mirai: common questions
Which is better on gas, the Genesis G80 or the Toyota Mirai?
The Genesis G80 is the more efficient of the two: it reaches 97 mpg combined versus 74 mpg for the Toyota Mirai, a 23 mpg advantage.
What engines do the G80 and Mirai offer?
Genesis G80: SIDI & PFI, SIDI. Toyota Mirai: PEFC.
Are they in the same vehicle class?
The EPA classifies the Genesis G80 as Large Cars and the Toyota Mirai as Compact Cars, so they aren't a like-for-like match on size.
More G80 comparisons
More Mirai comparisons
Comparison id: genesis-g80-vs-toyota-mirai