Hyundai Ioniq 6 vs Mercedes-Benz EQS: Specs Compared
Also searched as Mercedes-Benz EQS vs Hyundai Ioniq 6 specs — both orientations show this same side-by-side comparison.
The Hyundai Ioniq 6 is the more efficient of the two: it reaches 140 mpg combined versus 103 mpg for the Mercedes-Benz EQS, a 37 mpg advantage and costs about $150 less per year to fuel.
Across 4 measured categories, the Hyundai Ioniq 6 leads in 4. Figures are EPA test data, not manufacturer claims.
2023–2027
Hyundai Ioniq 6
Midsize Cars · 16 configurations
2022–2027
Mercedes-Benz EQS
Large Cars · 32 configurations
Head-to-head specifications
| Metric | Hyundai Ioniq 6 | Mercedes-Benz EQS |
|---|---|---|
| Best combined MPG | 140 mpg ✓ | 103 mpg |
| Best city MPG | 153 mpg ✓ | 101 mpg |
| Best highway MPG | 127 mpg ✓ | 105 mpg |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $550 ✓ | $700 |
| Lowest CO2 output | Not available | Not available |
| Engines offered | Not available | Not available |
| Transmissions | Automatic (A1) | Automatic (A1) |
| Drivetrains | All-Wheel Drive, Rear-Wheel Drive | All-Wheel Drive, Rear-Wheel Drive |
| Fuel types | Electricity | Electricity |
| EPA class | Midsize Cars | Large Cars |
| Years covered | 2023–2027 | 2022–2027 |
| Configurations on record | 16 | 32 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
Hyundai Ioniq 6 vs Mercedes-Benz EQS dimensions and size
The Mercedes-Benz EQS is 16.1 inches longer than the Hyundai Ioniq 6 on a wheelbase 10.2 inches longer, and 1,393.3 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.
| Dimension | Hyundai Ioniq 6 (2026) | Mercedes-Benz EQS (2026) | Difference |
|---|---|---|---|
| Length | 190.9 in | 207.1 in | 16.1 in |
| Width (excl. mirrors) | 74 in | 76 in | 2 in |
| Height | 59.1 in | 59.1 in | identical |
| Wheelbase | 116.1 in | 126.4 in | 10.2 in |
| Curb weight | 4,462 lbs | 5,855 lbs | 1,393 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 Ioniq 6 vs Mercedes-Benz EQS: what the numbers mean
Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Hyundai Ioniq 6 burns about $550 of fuel annually against $700 for the Mercedes-Benz EQS. That $150 yearly gap compounds to roughly $750 over five years and $1,200 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 and highway economy: the Hyundai Ioniq 6 leads in both cycles — 153 mpg city and 127 mpg highway against 101 and 105 mpg — so its fuel-efficiency advantage holds whether you commute in traffic or cover long highway miles.
Drivetrain and class: the Hyundai Ioniq 6 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 Midsize Cars and Large Cars respectively — the class drives the interior volume, cargo space and passenger space each one is measured against.
Ioniq 6 vs EQS: common questions
Which is better on gas, the Hyundai Ioniq 6 or the Mercedes-Benz EQS?
The Hyundai Ioniq 6 is the more efficient of the two: it reaches 140 mpg combined versus 103 mpg for the Mercedes-Benz EQS, a 37 mpg advantage and costs about $150 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the Hyundai Ioniq 6 runs about $550 a year in fuel at its most efficient configuration, versus about $700 for the Mercedes-Benz EQS — a difference of roughly $150 per year.
What engines do the Ioniq 6 and EQS offer?
Hyundai Ioniq 6: no engine data on record. Mercedes-Benz EQS: no engine data on record.
Are they in the same vehicle class?
The EPA classifies the Hyundai Ioniq 6 as Midsize Cars and the Mercedes-Benz EQS as Large Cars, so they aren't a like-for-like match on size.
More Ioniq 6 comparisons
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Comparison id: hyundai-ioniq-6-vs-mercedes-benz-eqs