VS

Fiat 500 Convertible vs Mercedes GLB comparison

Compare performance (118 HP vs 354 HP), boot space and price (19,700 £ vs 43,200 £ ) at a glance. Find out which car is the better choice for you – Fiat 500 Convertible or Mercedes GLB?

Fiat 500 Convertible vs Mercedes GLB: Key differences

Fiat 500 Convertible

  • significantly cheaper
  • only slightly more efficient
  • somewhat more efficient
  • significantly lighter
details

Mercedes GLB

3.6 (4 Reviews)
rate
  • considerably more power
  • considerably more electric range
  • significantly quicker 0–100 km/h
  • clearly 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

500 Convertible

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.

Fiat 500 Convertible is significantly cheaper – starting at 19,700 £ , while the Mercedes GLB costs 43,200 £ . That’s a price difference of around 23,492 £.

Fuel consumption also shows a difference: the Fiat 500 Convertible uses 5.2 L/100km and is only slightly more efficient than the Mercedes GLB with 5.7 L/100km. The difference is about 0.5 L/100km.

In terms of energy consumption, the Fiat 500 Convertible is somewhat more efficient: consuming 13 kWh/100km compared to 15.4 kWh/100km for the Mercedes GLB. That’s a difference of about 2.4 kWh/100km.

As for electric range, the Mercedes GLB offers considerably more range – reaching up to 631 km, about 318 km more than the Fiat 500 Convertible.

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 118 HP. That’s roughly 236 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes GLB is significantly quicker – completing the sprint in 5.5 s, while the Fiat 500 Convertible takes 9 s. That’s about 3.5 s quicker.

There’s also a difference in torque: the Mercedes GLB delivers clearly more torque with 515 Nm compared to 220 Nm. That’s about 295 Nm more.

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, Fiat 500 Convertible is significantly lighter – 1,150 kg compared to 1,840 kg. The difference is around 690 kg.

Looking at boot space, the Mercedes GLB offers clearly more boot space – 540 L compared to 183 L. That’s a difference of about 357 L.

When it comes to payload, the Mercedes GLB carries visibly more – 505 kg compared to 325 kg. That’s a difference of about 180 kg.

Who wins the race in the data check?

The Mercedes GLB is far ahead overall 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
details

Frequently compared as well

Mercedes GLB
smart #5
VS
The Mercedes GLB is a sensible, slightly boxy premium compact SUV that delivers real-world space, family practicality and a composed long-distance ride, while the smart #5 is a punchy electric crossover that trades rear-seat room for sharp styling, low running costs and urban agility. If you …
Mercedes EQB
Mercedes GLB
VS
The Mercedes EQB and Mercedes GLB target the same compact‑SUV buyers but take very different routes: the EQB is the all‑electric choice while the GLB relies on conventional petrol/diesel and mild‑hybrid engines. This quick comparison looks at driving character, interior practicality, range and …
Fiat 500 Convertible
Mercedes GLB

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Fiat 500 Convertible

The Fiat 500 Convertible is a cheeky, retro-styled roof-down city car that turns heads and makes short trips feel like mini vacations. It’s more about charm and personality than practicality, ideal for style-conscious buyers who prefer fun and flair over brute practicality.

details
serpimg_y1nmRB

Reviews Fiat 500 Convertible

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.

details
19C0853_001
19C0853_003
19C0853_015
19C0853_069
19C0797_007

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

Frequently compared as well

BMW iX3
Mercedes GLB
VS
The BMW iX3 and Mercedes GLB go head-to-head as two very different takes on the premium compact SUV: the iX3 is BMW’s electric, efficiency-focused offering while the GLB is Mercedes’ practical, multi‑seat family SUV. This comparison will help you weigh the iX3’s EV range, refinement and tech …
Mercedes GLB
VW Tayron
VS
The Mercedes GLB and VW Tayron are compact SUVs that both promise roomy cabins and practical versatility, but they take different routes — the GLB pushes a more premium, flexible interior with optional third-row seating, while the Tayron focuses on solid value and straightforward Volkswagen …
Mercedes GLB
Volvo EX60
VS
Line up the pragmatic, boxy Mercedes GLB — a family-friendly compact SUV that prides itself on space and sensible engineering — against the sleek, tech-forward Volvo EX60 with its unmistakable Scandinavian design and safety-first instincts. It’s a clash of personalities: German practicality and …
Mercedes GLB
Mercedes GLE
VS
In the competitive luxury SUV segment, the Mercedes GLB stands out with its compact dimensions and versatile interior, making it an ideal choice for urban drivers seeking practicality without sacrificing style. In contrast, the Mercedes GLE offers a more spacious cabin and robust performance, …
Mercedes GLB
Skoda Kodiaq
VS
The Mercedes GLB dresses up compact practicality in a premium suit, with crisp tech and city-friendly manners, while the Skoda Kodiaq goes full-on family hauler, offering cavernous space and sensible value. Choose the GLB for style and badge appeal; pick the Kodiaq if you need seats, luggage and a …
Mercedes CLA Shooting Brake
Mercedes GLB
VS
The Mercedes CLA Shooting Brake and the Mercedes GLB take two very different approaches to compact premium motoring: the CLA Shooting Brake pairs coupe-like styling with an estate’s practicality, while the GLB is a boxy, family-focused compact SUV that emphasizes space and versatility. If you …
Mercedes B Class
Mercedes GLB
VS
When pitting the Mercedes B-Class against the Mercedes GLB, one quickly notices the distinct personalities of these two models. The B-Class offers a compact, agile experience perfect for urban environments, while the GLB combines that agility with a more spacious, SUV-like presence, making it ideal …
Mercedes GLB
Skoda Enyaq
VS
Mercedes GLB and Skoda Enyaq go head-to-head: compare performance, space, features and price in one quick overview to see which model suits your daily driving, budget and lifestyle better. A clear, side-by-side look helps you make the smarter choice. || Unsure whether the Mercedes GLB or the Skoda …
Fiat 500 Convertible
Mercedes GLB

Costs and Consumption
Price
19,700 - 28,300 £
Price
43,200 - 62,400 £
Consumption L/100km
5.2 - 5.3 L/100km
Consumption L/100km
5.7 - 6.1 L/100km
Consumption kWh/100km
13 - 14.9 kWh/100km
Consumption kWh/100km
15.4 - 15.9 kWh/100km
Electric Range
190 - 313 km
Electric Range
431 - 631 km
Battery Capacity
-
Battery Capacity
-
co2
0 - 123 g/km
co2
0 - 138 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Convertible
Body Type
SUV
Seats
4
Seats
5
Doors
-
Doors
-
Curb weight
1,150 - 1,480 kg
Curb weight
1,840 - 2,280 kg
Trunk capacity
183 L
Trunk capacity
540 L
Length
-
Length
-
Width
1,683 - 1,684 mm
Width
1,861 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
250 - 325 kg
Payload
485 - 505 kg

Engine and Performance
Engine Type
Electric, Petrol MHEV
Engine Type
Electric, Full Hybrid
Transmission
Automatic, Manuel
Transmission
Automatic
Transmission Detail
Reduction Gearbox, Manual Gearbox
Transmission Detail
Reduction Gearbox
Drive Type
Front-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
65 - 118 HP
Power HP
156 - 354 HP
Acceleration 0-100km/h
9 - 17.3 s
Acceleration 0-100km/h
5.5 - 9.7 s
Max Speed
-
Max Speed
-
Torque
92 - 220 Nm
Torque
280 - 515 Nm
Number of Cylinders
3
Number of Cylinders
4
Power kW
48 - 87 kW
Power kW
115 - 260 kW
Engine capacity
999 cm3
Engine capacity
1,499 cm3

General
Model Year
2,025 - 2,026
Model Year
2026
CO2 Efficiency Class
A, D
CO2 Efficiency Class
A, D, E
Brand
Fiat
Brand
Mercedes-Benz
What drive types are available for the Fiat 500 Convertible?

The Fiat 500 Convertible is available as Front-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.