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Fiat 600 vs Mercedes GLB comparison

Compare performance (156 HP vs 354 HP), boot space and price (21,000 £ vs 43,200 £ ) at a glance. Find out which car is the better choice for you – Fiat 600 or Mercedes GLB?

Fiat 600 vs Mercedes GLB: Key differences

Fiat 600

4.8 (3 Reviews)
rate
  • substantially cheaper
  • a bit more efficient
  • marginally more efficient
  • substantially lighter
details

Mercedes GLB

3.6 (4 Reviews)
rate
  • substantially more power
  • visibly more electric range
  • substantially quicker 0–100 km/h
  • noticeably 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

600

Costs and Efficiency:

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

Fiat 600 is substantially cheaper – starting at 21,000 £ , while the Mercedes GLB costs 43,200 £ . That’s a price difference of around 22,206 £.

Fuel consumption also shows a difference: the Fiat 600 uses 4.8 L/100km and is a bit more efficient than the Mercedes GLB with 5.7 L/100km. The difference is about 0.9 L/100km.

In terms of energy consumption, the Fiat 600 is marginally more efficient: consuming 15.1 kWh/100km compared to 15.4 kWh/100km for the Mercedes GLB. That’s a difference of about 0.3 kWh/100km.

As for electric range, the Mercedes GLB offers visibly more range – reaching up to 631 km, about 222 km more than the Fiat 600.

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 substantially more power – delivering 354 HP compared to 156 HP. That’s roughly 198 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes GLB is substantially quicker – completing the sprint in 5.5 s, while the Fiat 600 takes 8.5 s. That’s about 3 s quicker.

There’s also a difference in torque: the Mercedes GLB delivers considerably more torque with 515 Nm compared to 260 Nm. That’s about 255 Nm more.

600

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.

Both vehicles offer seating for 5 people.

In terms of curb weight, Fiat 600 is substantially lighter – 1,265 kg compared to 1,840 kg. The difference is around 575 kg.

Looking at boot space, the Mercedes GLB offers noticeably more boot space – 540 L compared to 385 L. That’s a difference of about 155 L.

When it comes to payload, the Fiat 600 carries barely more – 517 kg compared to 505 kg. That’s a difference of about 12 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

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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Fiat 600

The Fiat 600 is small, cheeky and utterly charming, a pocket-sized Italian that packs more personality than its size suggests. Ideal for city buyers who want fuss-free motoring with a playful driving character, it puts smiles ahead of spreadsheets.

details
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Reviews Fiat 600

4.8 (3 Reviews)
rate
Jos van der kolk
20 Jan 2026, 21:23:37

Lovely car — one thing they forgot: the 600 has a heat pump and, as far as I know, the 500 doesn’t, which is quite an important detail.

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

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
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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

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Mercedes GLB

Costs and Consumption
Price
21,000 - 31,300 £
Price
43,200 - 62,400 £
Consumption L/100km
4.8 - 5.7 L/100km
Consumption L/100km
5.7 - 6.1 L/100km
Consumption kWh/100km
15.1 kWh/100km
Consumption kWh/100km
15.4 - 15.9 kWh/100km
Electric Range
409 km
Electric Range
431 - 631 km
Battery Capacity
-
Battery Capacity
-
co2
0 - 129 g/km
co2
0 - 138 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,265 - 1,595 kg
Curb weight
1,840 - 2,280 kg
Trunk capacity
360 - 385 L
Trunk capacity
540 L
Length
-
Length
-
Width
1,779 mm
Width
1,861 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
427 - 517 kg
Payload
485 - 505 kg

Engine and Performance
Engine Type
Petrol MHEV, Electric, Petrol
Engine Type
Electric, Full Hybrid
Transmission
Automatic, Manuel
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic, Reduction Gearbox, Manual Gearbox
Transmission Detail
Reduction Gearbox
Drive Type
Front-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
100 - 156 HP
Power HP
156 - 354 HP
Acceleration 0-100km/h
8.5 - 10.6 s
Acceleration 0-100km/h
5.5 - 9.7 s
Max Speed
-
Max Speed
-
Torque
205 - 260 Nm
Torque
280 - 515 Nm
Number of Cylinders
3
Number of Cylinders
4
Power kW
74 - 115 kW
Power kW
115 - 260 kW
Engine capacity
1,199 cm3
Engine capacity
1,499 cm3

General
Model Year
2,025 - 2,026
Model Year
2026
CO2 Efficiency Class
C, A, D
CO2 Efficiency Class
A, D, E
Brand
Fiat
Brand
Mercedes-Benz
What drive types are available for the Fiat 600?

The Fiat 600 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.