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Mazda MX-5 Roadster vs Mercedes GLB comparison

Compare performance (132 HP vs 354 HP), boot space and price (28,400 £ vs 50,600 £ ) at a glance. Find out which car is the better choice for you – Mazda MX-5 Roadster or Mercedes GLB?

Mazda MX-5 Roadster vs Mercedes GLB: Key differences

Mazda MX-5 Roadster

  • significantly cheaper
  • considerably lighter

Mercedes GLB

3.2 (3 Reviews)
rate
  • considerably more power
  • considerably quicker 0–100 km/h
  • considerably 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

MX-5 Roadster

Costs and Efficiency:

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

Mazda MX-5 Roadster is significantly cheaper – starting at 28,400 £ , while the Mercedes GLB costs 50,600 £ . That’s a price difference of around 22,164 £.

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 Mercedes GLB offers considerably more power – delivering 354 HP compared to 132 HP. That’s roughly 222 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes GLB is considerably quicker – completing the sprint in 5.5 s, while the Mazda MX-5 Roadster takes 8.3 s. That’s about 2.8 s quicker.

There’s also a difference in torque: the Mercedes GLB delivers clearly more torque with 515 Nm compared to 152 Nm. That’s about 363 Nm more.

MX-5 Roadster

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: Mercedes GLB offers more seats – 5 vs 2.

In terms of curb weight, Mazda MX-5 Roadster is considerably lighter – 1,078 kg compared to 2,200 kg. The difference is around 1,122 kg.

Looking at boot space, the Mercedes GLB offers considerably more boot space – 540 L compared to 130 L. That’s a difference of about 410 L.

When it comes to payload, the Mercedes GLB carries considerably more – 500 kg compared to 152 kg. That’s a difference of about 348 kg.

Who wins the race in the data check?

The Mercedes GLB 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 £50,600
GLB

Mercedes GLB

  • Engine Type : Electric
  • Transmission : Automatic
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 272 - 354 HP
  • Consumption kWh/100km : 15.8 - 15.9 kWh/100km
  • Electric Range : 614 - 631 km
details

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Mazda MX-5 Roadster
Mercedes GLB

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mazda MX-5 Roadster

The Mazda MX-5 is a featherweight, open-top sports car that turns ordinary roads into a grin-inducing playground thanks to razor-sharp steering and an engaging, tactile gearbox. It won’t swallow the weekly shopping or ski bags, but for anyone after pure driving fun and sun-on-your-face weekends, few cars match its sheer charm and value.

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Reviews Mazda MX-5 Roadster

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

3.2 (3 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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Mazda MX-5 Roadster
Mercedes GLB

Costs and Consumption
Price
28,400 - 33,800 £
Price
50,600 - 62,400 £
Consumption L/100km
6.2 L/100km
Consumption L/100km
-
Consumption kWh/100km
-
Consumption kWh/100km
15.8 - 15.9 kWh/100km
Electric Range
-
Electric Range
614 - 631 km
Battery Capacity
-
Battery Capacity
-
co2
140 g/km
co2
0 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Roadster
Body Type
SUV
Seats
2
Seats
5
Doors
-
Doors
-
Curb weight
1,078 kg
Curb weight
2,200 - 2,280 kg
Trunk capacity
130 L
Trunk capacity
540 L
Length
-
Length
-
Width
1,735 mm
Width
1,861 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
152 kg
Payload
500 kg

Engine and Performance
Engine Type
Petrol
Engine Type
Electric
Transmission
Manuel
Transmission
Automatic
Transmission Detail
Manual Gearbox
Transmission Detail
Reduction Gearbox
Drive Type
Rear-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
132 HP
Power HP
272 - 354 HP
Acceleration 0-100km/h
8.3 s
Acceleration 0-100km/h
5.5 - 7.4 s
Max Speed
-
Max Speed
-
Torque
152 Nm
Torque
335 - 515 Nm
Number of Cylinders
4
Number of Cylinders
-
Power kW
97 kW
Power kW
200 - 260 kW
Engine capacity
1,496 cm3
Engine capacity
-

General
Model Year
2,025
Model Year
2,026
CO2 Efficiency Class
E
CO2 Efficiency Class
A
Brand
Mazda
Brand
Mercedes-Benz
What drive types are available for the Mazda MX-5 Roadster?

The Mazda MX-5 Roadster is available as 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.