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BMW i4 vs Mercedes GLB comparison

Compare performance (601 HP vs 354 HP), boot space and price (49,400 £ vs 50,600 £ ) at a glance. Find out which car is the better choice for you – BMW i4 or Mercedes GLB?

BMW i4 vs Mercedes GLB: Key differences

BMW i4

4.9 (2 Reviews)
rate
  • barely cheaper
  • substantially more power
  • only slightly more efficient
  • significantly quicker 0–100 km/h
  • marginally lighter

Mercedes GLB

3.6 (4 Reviews)
rate
  • marginally more electric range
  • slightly more trunk space

All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.

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

i4

Costs and Efficiency:

Price and efficiency are key factors when choosing a car – and this is often where the real differences emerge.

BMW i4 is barely cheaper – starting at 49,400 £ , while the Mercedes GLB costs 50,600 £ . That’s a price difference of around 1,241 £.

In terms of energy consumption, the BMW i4 is only slightly more efficient: consuming 14.7 kWh/100km compared to 15.8 kWh/100km for the Mercedes GLB. That’s a difference of about 1.1 kWh/100km.

As for electric range, the Mercedes GLB offers marginally more range – reaching up to 631 km, about 18 km more than the BMW i4.

GLB

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 BMW i4 offers substantially more power – delivering 601 HP compared to 354 HP. That’s roughly 247 HP more horsepower.

When accelerating from 0 to 100 km/h, the BMW i4 is significantly quicker – completing the sprint in 3.7 s, while the Mercedes GLB takes 5.5 s. That’s about 1.8 s quicker.

There’s also a difference in torque: the BMW i4 delivers visibly more torque with 795 Nm compared to 515 Nm. That’s about 280 Nm more.

i4

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 5 people.

In terms of curb weight, BMW i4 is marginally lighter – 2,070 kg compared to 2,200 kg. The difference is around 130 kg.

Looking at boot space, the Mercedes GLB offers slightly more boot space – 540 L compared to 470 L. That’s a difference of about 70 L.

When it comes to payload, the Mercedes GLB carries marginally more – 500 kg compared to 480 kg. That’s a difference of about 20 kg.

Who wins the race in the data check?

The BMW i4 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 £49,400
i4

BMW i4

  • Engine Type : Electric
  • Transmission : Automatic
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 286 - 601 HP
  • Consumption kWh/100km : 14.7 - 16.7 kWh/100km
  • Electric Range : 514 - 613 km
details

Frequently compared as well

BMW i4
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Mercedes GLB
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BMW i4
Mercedes GLB

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

BMW i4

The BMW i4 arrives with the poise of a classic Gran Coupé, marrying BMW's playful handling with a sleek, modern interior that makes switching to electric feel like an upgrade rather than a compromise. For buyers who want a practical daily driver that still enjoys a spirited back-road run, the i4 quietly delivers smiles and a surprising dose of driver engagement.

details
P90439358_highRes_bmw-i4-m50-9-2021
P90439356_highRes_bmw-i4-m50-9-2021
P90439360_highRes_bmw-i4-m50-9-2021
P90439369_highRes_bmw-i4-m50-9-2021
P90422904_highRes_bmw-i4-interieur-6-2

Reviews BMW i4

4.9 (2 Reviews)
rate

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

Mercedes GLB

The Mercedes GLB is a practical compact SUV that mixes boxy, family-friendly space with premium German polish, making it an appealing choice for buyers who want usefulness without pretension. It drives with a confident, composed feel and somehow manages to look both rugged and refined — the grown-up SUV that still likes to have fun.

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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

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BMW i4
Mercedes GLB

Costs and Consumption
Price
49,400 - 62,500 £
Price
50,600 - 62,400 £
Consumption L/100km
-
Consumption L/100km
-
Consumption kWh/100km
14.7 - 16.7 kWh/100km
Consumption kWh/100km
15.8 - 15.9 kWh/100km
Electric Range
514 - 613 km
Electric Range
614 - 631 km
Battery Capacity
-
Battery Capacity
-
co2
0 g/km
co2
0 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Hatchback
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
2,070 - 2,285 kg
Curb weight
2,200 - 2,280 kg
Trunk capacity
470 L
Trunk capacity
540 L
Length
-
Length
-
Width
1,852 mm
Width
1,861 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
445 - 480 kg
Payload
500 kg

Engine and Performance
Engine Type
Electric
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
286 - 601 HP
Power HP
272 - 354 HP
Acceleration 0-100km/h
3.7 - 6 s
Acceleration 0-100km/h
5.5 - 7.4 s
Max Speed
-
Max Speed
-
Torque
400 - 795 Nm
Torque
335 - 515 Nm
Number of Cylinders
-
Number of Cylinders
-
Power kW
210 - 442 kW
Power kW
200 - 260 kW
Engine capacity
-
Engine capacity
-

General
Model Year
2,024 - 2,025
Model Year
2,026
CO2 Efficiency Class
A
CO2 Efficiency Class
A
Brand
BMW
Brand
Mercedes-Benz
Is the BMW i4 offered with different drivetrains?

The BMW i4 is offered with 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.