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Fiat 500 vs Mercedes B Class comparison

Compare performance (118 HP vs 238 HP), boot space and price (17,100 £ vs 33,100 £ ) at a glance. Find out which car is the better choice for you – Fiat 500 or Mercedes B Class?

Fiat 500 vs Mercedes B Class: Key differences

Fiat 500

3.7 (1 Reviews)
rate
  • considerably cheaper
  • clearly lighter
details

Mercedes B Class

4.9 (5 Reviews)
rate
  • significantly more power
  • only slightly more efficient
  • markedly quicker 0–100 km/h
  • substantially 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

Costs and Efficiency:

Price and efficiency are often the first things buyers look at. Here it becomes clear which model has the long-term edge – whether at the pump, the plug, or in purchase price.

Fiat 500 is considerably cheaper – starting at 17,100 £ , while the Mercedes B Class costs 33,100 £ . That’s a price difference of around 15,995 £.

Fuel consumption also shows a difference: the Mercedes B Class uses 5.1 L/100km and is only slightly more efficient than the Fiat 500 with 5.2 L/100km. The difference is about 0.1 L/100km.

B Class

Engine and Performance:

Under the bonnet, it becomes clear which model is tuned for sportiness and which one takes the lead when you hit the accelerator.

When it comes to engine power, the Mercedes B Class offers significantly more power – delivering 238 HP compared to 118 HP. That’s roughly 120 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes B Class is markedly quicker – completing the sprint in 6.5 s, while the Fiat 500 takes 9 s. That’s about 2.5 s quicker.

There’s also a difference in torque: the Mercedes B Class delivers clearly more torque with 400 Nm compared to 220 Nm. That’s about 180 Nm more.

500

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 B Class offers more seats – 5 vs 4.

In terms of curb weight, Fiat 500 is clearly lighter – 1,130 kg compared to 1,405 kg. The difference is around 275 kg.

Looking at boot space, the Mercedes B Class offers substantially more boot space – 455 L compared to 185 L. That’s a difference of about 270 L.

When it comes to payload, the Mercedes B Class carries substantially more – 550 kg compared to 325 kg. That’s a difference of about 225 kg.

Who wins the race in the data check?

The Mercedes B Class 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 £33,100
B Class

Mercedes B Class

  • Engine Type : Petrol MHEV, Diesel
  • Transmission : Automatic
  • Drive Type : Front-Wheel Drive, All-Wheel Drive
  • Power HP : 116 - 238 HP
  • Consumption L/100km : 5.1 - 6.9 L/100km
details

Frequently compared as well

Mercedes A Class
Mercedes B Class
VS
The Mercedes A‑Class is the sporty, tech‑savvy compact that thrills with sharp handling and a slick cockpit, while the Mercedes B‑Class trades a bit of attitude for towering practicality, roomier seats and a more useful boot. Choose the A‑Class if you want driving fun and style; pick the B‑Class if …
Fiat 500
Fiat Panda
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The Fiat 500 is a cheeky, retro-styled city charmer that wraps bright personality and nimble handling into a compact package ideal for urban life. By contrast, the Fiat Panda trades glamour for practicality — roomier, tougher on rough roads and far more usable for families or weekend escapes, so …
Fiat 500
Mercedes B Class

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Fiat 500

The Fiat 500 is a cheeky, retro‑styled city car that turns heads with its iconic looks and playful personality. Perfect for weaving through tight streets and easing into tiny parking spots, it’s aimed at buyers who want style and character more than grand touring prowess.

details
190624_F_500_Lounge_MY2020_06
190624_F_500_Lounge_MY2020_10
190624_F_500_Lounge_MY2020_03

Reviews Fiat 500

3.7 (1 Reviews)
rate
Reijo Muhonen
28 Feb 2026, 16:46:06

I've owned both cars, and I still end up with the Fiat 500 — it always puts me in a good mood. For longer trips I take the train.

How do you mainly use this car? (optional): City / Short distance
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

Mercedes B Class

The Mercedes B-Class is a smart, grown-up compact people carrier that dresses everyday practicality in a near‑premium polish, perfect for buyers who want comfort and a classy badge without the theatrics. It won’t set your pulse racing on a back road, but it will make school runs, commutes and grocery hauls feel pleasantly civilized — a reliable, slightly posh companion for real life.

details
18C0947_011
18C0947_009
18C0953_005
18C0953_035
18C0947_044

Reviews Mercedes B Class

4.9 (5 Reviews)
rate
Peter
5 Mar 2026, 05:51:19

My wife and I have been driving a Mercedes W247 200d for seven years now, with 93,000 km on the clock. The car is very comfortable even on long trips and economical. At the last service the pads of the electric parking brake were replaced; otherwise no repairs. We love this car.

How do you mainly use this car? (optional): Family car
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

Frequently compared as well

Mercedes B Class
Mercedes GLA
VS
The Mercedes B‑Class is the practical, airy people‑carrier that prioritises space and comfort, while the Mercedes GLA takes the same mechanical smarts and adds SUV looks, higher ride height and a touch more road presence. Pick the B‑Class for family‑friendly sense and efficiency, choose the GLA if …
Fiat 500
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Small Italian icons go head-to-head as the cheeky Fiat 500 takes on the underrated Fiat 600 — two compact cars with very different personalities and practical promises. Whether you want head-turning city agility or a bit more space and sensible family use, this duel will show which little Fiat …
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In the battle of compact city cars, the Fiat 500 and Suzuki Swift each bring their unique flair to the table. The Fiat 500 is celebrated for its iconic retro design and customizable options, appealing to those who value style and individuality. On the other hand, the Suzuki Swift boasts a peppy …
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Choosing between the Fiat 500 and the Nissan Micra means weighing Italian flair against practical, value-driven design. The Fiat 500 brings iconic styling and a fun urban drive, while the Nissan Micra emphasizes interior space, fuel efficiency and everyday usability.
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Fiat 500 and Fiat Pandina 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.
Mercedes B Class
VW Golf
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Fiat 500
Hyundai i10
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In the battle of compact city cars, the Fiat 500 stands out with its chic Italian design and vibrant customization options, appealing to style-conscious drivers. Meanwhile, the Hyundai i10 impresses with its practicality and efficient use of space, making it an excellent choice for urban dwellers …
Fiat 500
Mercedes B Class

Costs and Consumption
Price
17,100 - 27,400 £
Price
33,100 - 52,500 £
Consumption L/100km
5.2 - 5.3 L/100km
Consumption L/100km
5.1 - 6.9 L/100km
Consumption kWh/100km
13 - 14.7 kWh/100km
Consumption kWh/100km
-
Electric Range
190 - 331 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
0 - 121 g/km
co2
133 - 156 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Hatchback
Body Type
MPV
Seats
4
Seats
5
Doors
-
Doors
-
Curb weight
1,130 - 1,475 kg
Curb weight
1,405 - 1,565 kg
Trunk capacity
183 - 185 L
Trunk capacity
445 - 455 L
Length
-
Length
-
Width
1,683 - 1,684 mm
Width
1,796 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
250 - 325 kg
Payload
515 - 550 kg

Engine and Performance
Engine Type
Electric, Petrol MHEV
Engine Type
Petrol MHEV, Diesel
Transmission
Automatic, Manuel
Transmission
Automatic
Transmission Detail
Reduction Gearbox, Manual Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
Front-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
65 - 118 HP
Power HP
116 - 238 HP
Acceleration 0-100km/h
9 - 16.2 s
Acceleration 0-100km/h
6.5 - 10 s
Max Speed
-
Max Speed
-
Torque
92 - 220 Nm
Torque
200 - 400 Nm
Number of Cylinders
3
Number of Cylinders
4
Power kW
48 - 87 kW
Power kW
85 - 175 kW
Engine capacity
999 cm3
Engine capacity
1,332 - 1,991 cm3

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
A, D
CO2 Efficiency Class
D, E, F
Brand
Fiat
Brand
Mercedes-Benz
Is the Fiat 500 offered with different drivetrains?

The Fiat 500 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.