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Mercedes GLS vs Hyundai IONIQ 9 comparison

Compare performance (634 HP vs 428 HP), boot space and price (191,300 £ vs 58,700 £ ) at a glance. Find out which car is the better choice for you – Mercedes GLS or Hyundai IONIQ 9?

Mercedes GLS vs Hyundai IONIQ 9: Key differences

Mercedes GLS

  • markedly more power
  • noticeably quicker 0–100 km/h
  • barely more trunk space
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Hyundai IONIQ 9

  • considerably cheaper
  • barely lighter
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By Achim Sedelmaier

Here’s where it gets real: The technical differences in detail

GLS

Costs and Efficiency:

Price and efficiency are often the first things buyers look at. Here it becomes clear which model has the long-term edge – whether at the pump, the plug, or in purchase price.

Hyundai IONIQ 9 is considerably cheaper – starting at 58,700 £ , while the Mercedes GLS costs 191,300 £ . That’s a price difference of around 132,546 £.

IONIQ 9

Engine and Performance:

Power, torque and acceleration say a lot about how a car feels on the road. This is where you see which model delivers more driving dynamics.

When it comes to engine power, the Mercedes GLS offers markedly more power – delivering 634 HP compared to 428 HP. That’s roughly 206 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes GLS is noticeably quicker – completing the sprint in 4.2 s, while the Hyundai IONIQ 9 takes 5.2 s. That’s about 1 s quicker.

There’s also a difference in torque: the Mercedes GLS delivers a bit more torque with 850 Nm compared to 700 Nm. That’s about 150 Nm more.

GLS

Space and Everyday Use:

Cabin size, boot volume and payload all play a role in everyday practicality. Here, comfort and flexibility make the difference.

Both vehicles offer seating for 7 people.

In terms of curb weight, Hyundai IONIQ 9 is barely lighter – 2,594 kg compared to 2,700 kg. The difference is around 106 kg.

Looking at boot space, the Mercedes GLS offers barely more boot space – 355 L compared to 338 L. That’s a difference of about 17 L.

When it comes to payload, the Mercedes GLS carries very slightly more – 695 kg compared to 643 kg. That’s a difference of about 52 kg.

Who wins the race in the data check?

The Hyundai IONIQ 9 stands well ahead of its rival in the objective data comparison.
This result only shows which model scores more points on paper – not which of the two cars feels right for you.

from £58,700
IONIQ 9

Hyundai IONIQ 9

  • Engine Type : Electric
  • Transmission : Automatic
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 218 - 428 HP
  • Consumption kWh/100km : 19.9 - 20.6 kWh/100km
  • Electric Range : 600 - 620 km
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Mercedes GLS
Hyundai IONIQ 9

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes GLS

The GLS — usually just called the GLS — is Mercedes' flagship SUV, wrapping limousine-like comfort and commanding road presence into a smart, family-ready package. It pampers occupants with a hushed cabin, premium materials and intuitive tech, while still managing to feel confident and a little indulgent on the daily commute.

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Reviews Mercedes GLS

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Hyundai IONIQ 9

The Hyundai IONIQ 9 is a bold step forward in the automotive world, combining cutting-edge electric technology with a sleek and modern design. This model stands out with its spacious interior and advanced features, ensuring both comfort and convenience for drivers and passengers alike. As Hyundai pushes the envelope in eco-friendly innovation, the IONIQ 9 represents the future of sustainable driving with its impressive range and performance capabilities.

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Reviews Hyundai IONIQ 9

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Mercedes GLS
Hyundai IONIQ 9

Costs and Consumption
Price
191,300 £
Price
58,700 - 74,400 £
Consumption L/100km
13.3 L/100km
Consumption L/100km
-
Consumption kWh/100km
-
Consumption kWh/100km
19.9 - 20.6 kWh/100km
Electric Range
-
Electric Range
600 - 620 km
Battery Capacity
-
Battery Capacity
-
co2
302 g/km
co2
0 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
SUV
Seats
7
Seats
7
Doors
-
Doors
-
Curb weight
2,700 kg
Curb weight
2,594 - 2,689 kg
Trunk capacity
355 L
Trunk capacity
338 L
Length
-
Length
-
Width
1,956 mm
Width
1,980 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
695 kg
Payload
586 - 643 kg

Engine and Performance
Engine Type
Petrol MHEV
Engine Type
Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Reduction Gearbox
Drive Type
All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
634 HP
Power HP
218 - 428 HP
Acceleration 0-100km/h
4.2 s
Acceleration 0-100km/h
5.2 - 9.4 s
Max Speed
-
Max Speed
-
Torque
850 Nm
Torque
350 - 700 Nm
Number of Cylinders
8
Number of Cylinders
-
Power kW
466 kW
Power kW
160 - 315 kW
Engine capacity
3,982 cm3
Engine capacity
-

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
G
CO2 Efficiency Class
A
Brand
Mercedes-Benz
Brand
Hyundai
Is the Mercedes GLS offered with different drivetrains?

The Mercedes GLS is available as All-Wheel Drive.

DriveDuel uses data analysis and artificial intelligence to evaluate vehicle data and create content. Content is regularly reviewed and improved. The displayed prices are estimates based on German list prices, adjusted to the respective country’s VAT. Country-specific registration taxes are not included. This information is not legally binding.