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Mazda 3 Hatchback vs Mercedes B Class comparison

Compare performance (186 HP vs 238 HP), boot space and price (24,500 £ vs 33,100 £ ) at a glance. Find out which car is the better choice for you – Mazda 3 Hatchback or Mercedes B Class?

Mazda 3 Hatchback vs Mercedes B Class: Key differences

Mazda 3 Hatchback

  • markedly cheaper

Mercedes B Class

4.9 (5 Reviews)
rate
  • visibly more power
  • substantially more efficient
  • noticeably quicker 0–100 km/h
  • very slightly lighter
  • markedly 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

3 Hatchback

Costs and Efficiency:

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

Mazda 3 Hatchback is markedly cheaper – starting at 24,500 £ , while the Mercedes B Class costs 33,100 £ . That’s a price difference of around 8,581 £.

Fuel consumption also shows a difference: the Mercedes B Class uses 2.5 L/100km and is substantially more efficient than the Mazda 3 Hatchback with 5.6 L/100km. The difference is about 3.1 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 visibly more power – delivering 238 HP compared to 186 HP. That’s roughly 52 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes B Class is noticeably quicker – completing the sprint in 6.5 s, while the Mazda 3 Hatchback takes 8 s. That’s about 1.5 s quicker.

There’s also a difference in torque: the Mercedes B Class delivers considerably more torque with 450 Nm compared to 240 Nm. That’s about 210 Nm more.

3 Hatchback

Space and Everyday Use:

Whether family car or daily driver – which one offers more room, flexibility and comfort?

Both vehicles offer seating for 5 people.

In terms of curb weight, Mercedes B Class is very slightly lighter – 1,405 kg compared to 1,419 kg. The difference is around 14 kg.

Looking at boot space, the Mercedes B Class offers markedly more boot space – 455 L compared to 351 L. That’s a difference of about 104 L.

When it comes to payload, the Mercedes B Class carries somewhat more – 550 kg compared to 485 kg. That’s a difference of about 65 kg.

Who wins the race in the data check?

The Mercedes B Class holds a decisive 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 £33,100
B Class

Mercedes B Class

  • Engine Type : Plugin Hybrid, Petrol MHEV, Diesel
  • Transmission : Automatic
  • Drive Type : Front-Wheel Drive, All-Wheel Drive
  • Power HP : 116 - 238 HP
  • Consumption L/100km : 2.5 - 6.9 L/100km
  • Electric Range : 83 km
details

Frequently compared as well

Mercedes B Class
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Mercedes A Class
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Mazda 3 Hatchback
Mercedes B Class

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mazda 3 Hatchback

The Mazda 3 hatchback blends elegant design with a surprisingly sporty drive, giving a cabin that feels more upscale than you’d expect for the segment. Practical enough for everyday life yet eager to entertain behind the wheel, it’s a smart, good-humored choice that makes even grocery runs feel like a mini escape.

details
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Reviews Mazda 3 Hatchback

No reviews yet. Share your experience and help others decide.

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.

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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

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Mazda 3 Hatchback
Mercedes B Class

Costs and Consumption
Price
24,500 - 35,500 £
Price
33,100 - 52,500 £
Consumption L/100km
5.6 - 6.5 L/100km
Consumption L/100km
2.5 - 6.9 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
83 km
Battery Capacity
-
Battery Capacity
12.9 kWh
co2
126 - 146 g/km
co2
56 - 156 g/km
Fuel tank capacity
-
Fuel tank capacity
35 L

Dimensions and Body
Body Type
Hatchback
Body Type
MPV
Seats
5
Seats
5
Doors
-
Doors
5
Curb weight
1,419 - 1,549 kg
Curb weight
1,405 - 1,745 kg
Trunk capacity
351 L
Trunk capacity
405 - 455 L
Length
-
Length
4,419 mm
Width
1,795 mm
Width
1,796 mm
Height
-
Height
1,562 mm
Max trunk capacity
-
Max trunk capacity
1,440 L
Payload
470 - 485 kg
Payload
505 - 550 kg

Engine and Performance
Engine Type
Petrol MHEV
Engine Type
Plugin Hybrid, Petrol MHEV, Diesel
Transmission
Manuel, Automatic
Transmission
Automatic
Transmission Detail
Manual Gearbox, Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
140 - 186 HP
Power HP
116 - 238 HP
Acceleration 0-100km/h
8 - 9.8 s
Acceleration 0-100km/h
6.5 - 10 s
Max Speed
-
Max Speed
223 km/h
Torque
238 - 240 Nm
Torque
200 - 450 Nm
Number of Cylinders
4
Number of Cylinders
4
Power kW
103 - 137 kW
Power kW
85 - 175 kW
Engine capacity
1,998 - 2,488 cm3
Engine capacity
1,332 - 1,991 cm3

General
Model Year
2,025
Model Year
2,024 - 2,025
CO2 Efficiency Class
D, E
CO2 Efficiency Class
B, D, E, F
Brand
Mazda
Brand
Mercedes-Benz
What drive types are available for the Mazda 3 Hatchback?

Available configurations include Front-Wheel Drive or All-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.