Genesis G80 vs Mercedes-Benz EQS: Specs Compared

Also searched as Mercedes-Benz EQS vs Genesis G80 specs — both orientations show this same side-by-side comparison.

The Mercedes-Benz EQS is the more efficient of the two: it reaches 103 mpg combined versus 97 mpg for the Genesis G80, a 6 mpg advantage and costs about $50 less per year to fuel.

Across 4 measured categories, the Mercedes-Benz EQS leads in 3. Figures are EPA test data, not manufacturer claims.

2017–2027

Genesis G80

Large Cars · 43 configurations

97mpg combined (best)
All Genesis G80 specs

2022–2027

Mercedes-Benz EQS

Large Cars · 32 configurations

103mpg combined (best)
All Mercedes-Benz EQS specs

Head-to-head specifications

MetricGenesis G80Mercedes-Benz EQS
Best combined MPG97 mpg103 mpg ✓
Best city MPG105 mpg ✓101 mpg
Best highway MPG93 mpg105 mpg ✓
Lowest annual fuel costEPA estimate at 15,000 miles per year$750$700 ✓
Lowest CO2 output345 g/miNot available
Engines offeredSIDI & PFI, SIDINot available
TransmissionsAutomatic (S8), Automatic (A1)Automatic (A1)
DrivetrainsAll-Wheel Drive, Rear-Wheel DriveAll-Wheel Drive, Rear-Wheel Drive
Fuel typesPremium, Electricity, RegularElectricity
EPA classLarge CarsLarge Cars
Years covered2017–20272022–2027
Configurations on record4332

Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.

Genesis G80 vs Mercedes-Benz EQS dimensions and size

The Mercedes-Benz EQS is 10.6 inches longer than the Genesis G80 on a wheelbase 7.9 inches longer, and 1,560.9 lbs heavier. At over 200 inches, the larger of the two is past the comfortable limit of a standard 192-inch single garage bay once you allow walking room.

Genesis G80 versus Mercedes-Benz EQS exterior dimensions
DimensionGenesis G80 (2026)Mercedes-Benz EQS (2026)Difference
Length196.5 in207.1 in10.6 in
Width (excl. mirrors)75.6 in76 in0.4 in
Height57.9 in59.1 in1.2 in
Wheelbase118.5 in126.4 in7.9 in
Curb weight4,295 lbs5,855 lbs1,561 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 Mercedes-Benz EQS: what the numbers mean

Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Mercedes-Benz EQS burns about $700 of fuel annually against $750 for the Genesis G80. 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 Genesis G80 is the stronger commuter at 105 mpg city, while the Mercedes-Benz EQS pulls ahead on the interstate at 105 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 Genesis G80 is recorded with 2 distinct engine configurations (SIDI & PFI, SIDI), the Mercedes-Benz EQS with no. Across 43 recorded Genesis G80 configurations and 32 for the Mercedes-Benz EQS, 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 Mercedes-Benz EQS with All-Wheel Drive, Rear-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 Large Cars respectively — the class drives the interior volume, cargo space and passenger space each one is measured against.

G80 vs EQS: common questions

Which is better on gas, the Genesis G80 or the Mercedes-Benz EQS?

The Mercedes-Benz EQS is the more efficient of the two: it reaches 103 mpg combined versus 97 mpg for the Genesis G80, a 6 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 Mercedes-Benz EQS runs about $700 a year in fuel at its most efficient configuration, versus about $750 for the Genesis G80 — a difference of roughly $50 per year.

What engines do the G80 and EQS offer?

Genesis G80: SIDI & PFI, SIDI. Mercedes-Benz EQS: no engine data on record.

Are they in the same vehicle class?

Yes — the EPA classifies both the Genesis G80 and the Mercedes-Benz EQS as Large Cars, so they compete directly.

More G80 comparisons

More EQS comparisons

Comparison id: genesis-g80-vs-mercedes-benz-eqs