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Hyundai IONIQ 9 vs Mercedes GLB comparison

Compare performance (428 HP vs 354 HP), boot space and price (59,900 £ vs 43,200 £ ) at a glance. Find out which car is the better choice for you – Hyundai IONIQ 9 or Mercedes GLB?

Hyundai IONIQ 9 vs Mercedes GLB: Key differences

Hyundai IONIQ 9

  • a bit more power
  • marginally quicker 0–100 km/h
details

Mercedes GLB

3.6 (4 Reviews)
rate
  • markedly cheaper
  • clearly more efficient
  • marginally more electric range
  • significantly lighter
  • visibly more trunk space
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All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.

By Achim Sedelmaier

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

IONIQ 9

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.

Mercedes GLB is markedly cheaper – starting at 43,200 £ , while the Hyundai IONIQ 9 costs 59,900 £ . That’s a price difference of around 16,674 £.

In terms of energy consumption, the Mercedes GLB is clearly more efficient: consuming 15.4 kWh/100km compared to 19.9 kWh/100km for the Hyundai IONIQ 9. That’s a difference of about 4.5 kWh/100km.

As for electric range, the Mercedes GLB offers marginally more range – reaching up to 631 km, about 11 km more than the Hyundai IONIQ 9.

GLB

Engine and Performance:

Power, torque and acceleration are the classic benchmarks for car enthusiasts – and here, some clear differences start to show.

When it comes to engine power, the Hyundai IONIQ 9 offers a bit more power – delivering 428 HP compared to 354 HP. That’s roughly 74 HP more horsepower.

When accelerating from 0 to 100 km/h, the Hyundai IONIQ 9 is marginally quicker – completing the sprint in 5.2 s, while the Mercedes GLB takes 5.5 s. That’s about 0.3 s quicker.

There’s also a difference in torque: the Hyundai IONIQ 9 delivers visibly more torque with 700 Nm compared to 515 Nm. That’s about 185 Nm more.

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.

Seats: Hyundai IONIQ 9 offers more seats – 7 vs 5.

In terms of curb weight, Mercedes GLB is significantly lighter – 1,840 kg compared to 2,594 kg. The difference is around 754 kg.

Looking at boot space, the Mercedes GLB offers visibly more boot space – 540 L compared to 338 L. That’s a difference of about 202 L.

When it comes to payload, the Hyundai IONIQ 9 carries markedly more – 643 kg compared to 505 kg. That’s a difference of about 138 kg.

Who wins the race in the data check?

The Mercedes GLB has the upper hand 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 £43,200
GLB

Mercedes GLB

  • Engine Type Electric, Full Hybrid
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive, All-Wheel Drive
  • Power HP 156 - 354 HP
  • Consumption L/100km 5.7 - 6.1 L/100km
  • Consumption kWh/100km 15.4 - 15.9 kWh/100km
  • Electric Range 431 - 631 km
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

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

No reviews yet. Share your experience and help others decide.

Mercedes GLB

The Mercedes GLB is a compact luxury SUV that blends smart packaging with a polished, composed driving experience. Its flexible interior and premium feel make it a sensible pick for buyers who want Mercedes comfort and practicality in a smaller footprint.

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Reviews Mercedes GLB

3.6 (4 Reviews)
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Hans
19 Feb 2026, 02:39:00

Great car — very satisfied with the GLB 250 4MATIC.

How do you mainly use this car? (optional): Leisure / Weekend driver
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

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Costs and Consumption
Price
59,900 - 75,500 £
Price
43,200 - 62,400 £
Consumption L/100km
-
Consumption L/100km
5.7 - 6.1 L/100km
Consumption kWh/100km
19.9 - 20.6 kWh/100km
Consumption kWh/100km
15.4 - 15.9 kWh/100km
Electric Range
600 - 620 km
Electric Range
431 - 631 km
Battery Capacity
-
Battery Capacity
-
co2
0 g/km
co2
0 - 138 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
SUV
Seats
7
Seats
5
Doors
-
Doors
-
Curb weight
2,594 - 2,689 kg
Curb weight
1,840 - 2,280 kg
Trunk capacity
338 L
Trunk capacity
540 L
Length
-
Length
-
Width
1,980 mm
Width
1,861 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
586 - 643 kg
Payload
485 - 505 kg

Engine and Performance
Engine Type
Electric
Engine Type
Electric, Full Hybrid
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Reduction Gearbox
Transmission Detail
Reduction Gearbox
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
218 - 428 HP
Power HP
156 - 354 HP
Acceleration 0-100km/h
5.2 - 9.4 s
Acceleration 0-100km/h
5.5 - 9.7 s
Max Speed
-
Max Speed
-
Torque
350 - 700 Nm
Torque
280 - 515 Nm
Number of Cylinders
-
Number of Cylinders
4
Power kW
160 - 315 kW
Power kW
115 - 260 kW
Engine capacity
-
Engine capacity
1,499 cm3

General
Model Year
2025
Model Year
2026
CO2 Efficiency Class
A
CO2 Efficiency Class
A, D, E
Brand
Hyundai
Brand
Mercedes-Benz
What drivetrain options does the Hyundai IONIQ 9 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.