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Kia EV9 vs Mercedes GLS comparison

Compare performance (508 HP vs 404 HP), boot space and price (54,600 £ vs 92,700 £ ) at a glance. Find out which car is the better choice for you – Kia EV9 or Mercedes GLS?

Kia EV9 vs Mercedes GLS: Key differences

Kia EV9

5 (1 Reviews)
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  • substantially cheaper
  • noticeably more power
  • visibly quicker 0–100 km/h
  • very slightly lighter
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Mercedes GLS

  • barely more trunk space
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By Achim Sedelmaier

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

EV9

Costs and Efficiency:

When it comes to price and running costs, the biggest differences usually appear. This is often where you see which car fits your budget better in the long run.

Kia EV9 is substantially cheaper – starting at 54,600 £ , while the Mercedes GLS costs 92,700 £ . That’s a price difference of around 38,071 £.

GLS

Engine and Performance:

Under the bonnet, it becomes clear which model is tuned for sportiness and which one takes the lead when you hit the accelerator.

When it comes to engine power, the Kia EV9 offers noticeably more power – delivering 508 HP compared to 404 HP. That’s roughly 104 HP more horsepower.

When accelerating from 0 to 100 km/h, the Kia EV9 is visibly quicker – completing the sprint in 4.6 s, while the Mercedes GLS takes 5.6 s. That’s about 1 s quicker.

There’s also a difference in torque: the Mercedes GLS delivers marginally more torque with 750 Nm compared to 740 Nm. That’s about 10 Nm more.

EV9

Space and Everyday Use:

Beyond pure performance, interior space and usability matter most in daily life. This is where you see which car is more practical and versatile.

Both vehicles offer seating for 7 people.

In terms of curb weight, Kia EV9 is very slightly lighter – 2,392 kg compared to 2,580 kg. The difference is around 188 kg.

Looking at boot space, the Mercedes GLS offers barely more boot space – 355 L compared to 333 L. That’s a difference of about 22 L.

When it comes to payload, the Mercedes GLS carries clearly more – 820 kg compared to 615 kg. That’s a difference of about 205 kg.

Who wins the race in the data check?

The Kia EV9 is far ahead overall 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 £54,600
EV9

Kia EV9

  • Engine Type Electric
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive, All-Wheel Drive
  • Power HP 204 - 508 HP
  • Consumption kWh/100km 19.5 - 22.8 kWh/100km
  • Electric Range 443 - 563 km
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Frequently compared as well

Kia EV9
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The Kia EV9 and Kia EV5 are Kia's all-electric SUVs aimed at different buyers: the EV9 is a larger, three-row flagship built for family space and long-distance comfort, while the EV5 is a smaller, more city-oriented crossover that focuses on efficiency and value. I’ll compare their key differences …
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Kia EV9
Mercedes GLS

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Kia EV9

The Kia EV9 is a bold, boxy electric SUV that looks like it could swallow your luggage and the in‑laws, with an interior that feels more lounge than cockpit and a presence that makes smaller rivals suddenly feel shy. On the road it delivers calm long‑distance composure with enough shove to keep overtakes effortless, and its tech and practicality make it an easy, sensible choice for buyers who want electric without compromise.

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Reviews Kia EV9

5 (1 Reviews)
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No reviews yet. Share your experience and help others decide.

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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Mercedes GLS

Costs and Consumption
Price
54,600 - 78,400 £
Price
92,700 - 104,600 £
Consumption L/100km
-
Consumption L/100km
7.9 - 9.9 L/100km
Consumption kWh/100km
19.5 - 22.8 kWh/100km
Consumption kWh/100km
-
Electric Range
443 - 563 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
0 g/km
co2
206 - 226 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
SUV
Seats
6 - 7
Seats
7
Doors
-
Doors
-
Curb weight
2,392 - 2,664 kg
Curb weight
2,580 - 2,670 kg
Trunk capacity
333 L
Trunk capacity
355 L
Length
-
Length
-
Width
1,980 mm
Width
1,956 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
542 - 615 kg
Payload
810 - 820 kg

Engine and Performance
Engine Type
Electric
Engine Type
Petrol MHEV, Diesel MHEV
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Reduction Gearbox
Transmission Detail
Automatic Gearbox
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
All-Wheel Drive
Power HP
204 - 508 HP
Power HP
336 - 404 HP
Acceleration 0-100km/h
4.6 - 9.4 s
Acceleration 0-100km/h
5.6 - 6.2 s
Max Speed
-
Max Speed
-
Torque
350 - 740 Nm
Torque
560 - 750 Nm
Number of Cylinders
-
Number of Cylinders
6
Power kW
150 - 374 kW
Power kW
247 - 297 kW
Engine capacity
-
Engine capacity
2,989 - 2,999 cm3

General
Model Year
2025
Model Year
2026
CO2 Efficiency Class
A
CO2 Efficiency Class
G
Brand
Kia
Brand
Mercedes-Benz
What drivetrain options does the Kia EV9 have?

Available configurations include Rear-Wheel Drive or 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.