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Mercedes GLB vs Hyundai IONIQ 9 comparison

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

Mercedes GLB vs Hyundai IONIQ 9: Key differences

Mercedes GLB

3.6 (4 Reviews)
rate
  • noticeably cheaper
  • markedly more efficient
  • very slightly more electric range
  • considerably lighter
  • visibly more trunk space
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Hyundai IONIQ 9

  • somewhat more power
  • only slightly quicker 0–100 km/h
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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

GLB

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.

Mercedes GLB is noticeably 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 markedly 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 very slightly more range – reaching up to 631 km, about 11 km more than the Hyundai IONIQ 9.

IONIQ 9

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 somewhat 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 only slightly 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.

GLB

Space and Everyday Use:

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

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

In terms of curb weight, Mercedes GLB is considerably 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 clearly 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 holds a narrow overall lead 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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Frequently compared as well

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Mercedes GLB
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

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)
rate
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

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.

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Hyundai IONIQ 9

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

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

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

General
Model Year
2026
Model Year
2025
CO2 Efficiency Class
A, D, E
CO2 Efficiency Class
A
Brand
Mercedes-Benz
Brand
Hyundai
What drive types are available for the Mercedes GLB?

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.