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BMW 8 Series Convertible vs Mercedes GLB comparison
Compare performance (625 HP vs 354 HP), boot space and price (99,400 £ vs 43,200 £ ) at a glance. Find out which car is the better choice for you – BMW 8 Series Convertible or Mercedes GLB?
BMW 8 Series Convertible vs Mercedes GLB: Key differences
All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.
8 Series Convertible
Costs and Efficiency:
Price and efficiency are key factors when choosing a car – and this is often where the real differences emerge.
Mercedes GLB is clearly cheaper – starting at 43,200 £ , while the BMW 8 Series Convertible costs 99,400 £ . That’s a price difference of around 56,231 £.
Fuel consumption also shows a difference: the Mercedes GLB uses 5.7 L/100km and is noticeably more efficient than the BMW 8 Series Convertible with 6.9 L/100km. The difference is about 1.2 L/100km.
GLB
Engine and Performance:
Power, torque and acceleration say a lot about how a car feels on the road. This is where you see which model delivers more driving dynamics.
When it comes to engine power, the BMW 8 Series Convertible offers clearly 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 Convertible is substantially quicker – completing the sprint in 3.3 s, while the Mercedes GLB takes 5.5 s. That’s about 2.2 s quicker.
There’s also a difference in torque: the BMW 8 Series Convertible delivers markedly more torque with 750 Nm compared to 515 Nm. That’s about 235 Nm more.
8 Series Convertible
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: Mercedes GLB offers more seats – 5 vs 4.
In terms of curb weight, Mercedes GLB is very slightly lighter – 1,840 kg compared to 1,915 kg. The difference is around 75 kg.
Looking at boot space, the Mercedes GLB offers visibly more boot space – 540 L compared to 350 L. That’s a difference of about 190 L.
When it comes to payload, the Mercedes GLB carries a bit more – 505 kg compared to 425 kg. That’s a difference of about 80 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
Mercedes GLB
BMW 8 Series Convertible
Mercedes GLB
Costs and Consumption
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Engine and Performance
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Dimensions and Body
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BMW 8 Series Convertible
The BMW 8 Series Convertible is a head-turning grand tourer that drops its roof with the kind of theatrical flourish you expect from a modern Bavarian showboat. It wraps occupants in sumptuous materials and driver-focused polish, offering effortless long-distance comfort and just enough drama to make every arrival feel like an occasion.
details
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.
details
BMW 8 Series Convertible
Mercedes GLB
Costs and Consumption |
|
|---|---|
|
Price
99,400 - 165,800 £
|
Price
43,200 - 62,400 £
|
|
Consumption L/100km
6.9 - 11.2 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
180 - 255 g/km
|
co2
0 - 138 g/km
|
|
Fuel tank capacity
66 - 68 L
|
Fuel tank capacity
-
|
Dimensions and Body |
|
|---|---|
|
Body Type
Convertible
|
Body Type
SUV
|
|
Seats
4
|
Seats
5
|
|
Doors
2
|
Doors
-
|
|
Curb weight
1,915 - 2,125 kg
|
Curb weight
1,840 - 2,280 kg
|
|
Trunk capacity
350 L
|
Trunk capacity
540 L
|
|
Length
4,851 - 4,867 mm
|
Length
-
|
|
Width
1,902 - 1,907 mm
|
Width
1,861 mm
|
|
Height
1,345 - 1,353 mm
|
Height
-
|
|
Max trunk capacity
-
|
Max trunk capacity
-
|
|
Payload
340 - 425 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
3.3 - 5.5 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
|
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.