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BMW 8 Series Coupé vs Mercedes GLB comparison

Compare performance (625 HP vs 354 HP), boot space and price (90,000 £ vs 43,200 £ ) at a glance. Find out which car is the better choice for you – BMW 8 Series Coupé or Mercedes GLB?

BMW 8 Series Coupé vs Mercedes GLB: Key differences

BMW 8 Series Coupé

  • substantially more power
  • significantly quicker 0–100 km/h
  • very slightly lighter
details

Mercedes GLB

3.6 (4 Reviews)
rate
  • substantially cheaper
  • somewhat more efficient
  • somewhat more trunk space
details

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

8 Series Coupé

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 substantially cheaper – starting at 43,200 £ , while the BMW 8 Series Coupé costs 90,000 £ . That’s a price difference of around 46,803 £.

Fuel consumption also shows a difference: the Mercedes GLB uses 5.7 L/100km and is somewhat more efficient than the BMW 8 Series Coupé with 6.7 L/100km. The difference is about 1 L/100km.

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 BMW 8 Series Coupé offers substantially more power – delivering 625 HP compared to 354 HP. That’s roughly 271 HP more horsepower.

When accelerating from 0 to 100 km/h, the BMW 8 Series Coupé is significantly quicker – completing the sprint in 3.2 s, while the Mercedes GLB takes 5.5 s. That’s about 2.3 s quicker.

There’s also a difference in torque: the BMW 8 Series Coupé delivers clearly more torque with 750 Nm compared to 515 Nm. That’s about 235 Nm more.

8 Series Coupé

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 8 Series Coupé is very slightly lighter – 1,805 kg compared to 1,840 kg. The difference is around 35 kg.

Looking at boot space, the Mercedes GLB offers somewhat more boot space – 540 L compared to 440 L. That’s a difference of about 100 L.

When it comes to payload, the BMW 8 Series Coupé carries very slightly more – 545 kg compared to 505 kg. That’s a difference of about 40 kg.

Who wins the race in the data check?

The BMW 8 Series Coupé is decisively ahead 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 £90,000
8 Series Coupé

BMW 8 Series Coupé

  • Engine Type : Diesel MHEV, Petrol
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive, Rear-Wheel Drive
  • Power HP : 333 - 625 HP
  • Consumption L/100km : 6.7 - 11.5 L/100km
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

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BMW 8 Series Coupé

The BMW 8 Series Coupé blends elegant, low-slung coupé looks with a purposeful, athletic stance that hints at both comfort and serious driving fun. Inside it feels indulgent and driver-focused, the sort of car that turns motorway miles into a breeze while quietly daring you to chase a twisty back road — and yes, it photographs magnificently.

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P90348805_highRes_the-all-new-bmw-m8-c

Reviews BMW 8 Series Coupé

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)
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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Costs and Consumption
Price
90,000 - 158,900 £
Price
43,200 - 62,400 £
Consumption L/100km
6.7 - 11.5 L/100km
Consumption L/100km
5.7 - 6.1 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
15.4 - 15.9 kWh/100km
Electric Range
-
Electric Range
431 - 631 km
Battery Capacity
-
Battery Capacity
-
co2
176 - 263 g/km
co2
0 - 138 g/km
Fuel tank capacity
66 - 68 L
Fuel tank capacity
-

Dimensions and Body
Body Type
Coupe
Body Type
SUV
Seats
4 - 5
Seats
5
Doors
2 - 4
Doors
-
Curb weight
1,805 - 2,085 kg
Curb weight
1,840 - 2,280 kg
Trunk capacity
420 - 440 L
Trunk capacity
540 L
Length
4,851 - 5,098 mm
Length
-
Width
1,902 - 1,943 mm
Width
1,861 mm
Height
1,346 - 1,420 mm
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
370 - 545 kg
Payload
485 - 505 kg

Engine and Performance
Engine Type
Diesel MHEV, Petrol
Engine Type
Electric, Full Hybrid
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Reduction Gearbox
Drive Type
All-Wheel Drive, Rear-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
333 - 625 HP
Power HP
156 - 354 HP
Acceleration 0-100km/h
3.2 - 5.4 s
Acceleration 0-100km/h
5.5 - 9.7 s
Max Speed
250 km/h
Max Speed
-
Torque
500 - 750 Nm
Torque
280 - 515 Nm
Number of Cylinders
6 - 8
Number of Cylinders
4
Power kW
245 - 460 kW
Power kW
115 - 260 kW
Engine capacity
2,993 - 4,395 cm3
Engine capacity
1,499 cm3

General
Model Year
2024
Model Year
2026
CO2 Efficiency Class
G
CO2 Efficiency Class
A, D, E
Brand
BMW
Brand
Mercedes-Benz
What drive types are available for the BMW 8 Series Coupé?

The BMW 8 Series Coupé is offered with All-Wheel Drive or Rear-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.