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Mazda 3 Hatchback vs Mercedes B Class - Differences and prices compared

Compare performance (186 HP vs 238 HP), boot space and price (24500 £ vs 33100 £ ) at a glance. Find out which car is the better choice for you – Mazda 3 Hatchback or Mercedes B Class?

Mazda 3 Hatchback

Mercedes B Class

5 (4 Reviews)
rate

Here’s where it gets real: The technical differences in detail

3 Hatchback

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.

Mazda 3 Hatchback has a distinct advantage in terms of price – it starts at 24500 £ , while the Mercedes B Class costs 33100 £ . That’s a price difference of around 8581 £.

Fuel consumption also shows a difference: Mercedes B Class manages with 2.50 L and is therefore clearly more efficient than the Mazda 3 Hatchback with 5.60 L. The difference is about 3.10 L per 100 km.

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 has a distinct edge – offering 238 HP compared to 186 HP. That’s roughly 52 HP more horsepower.

In acceleration from 0 to 100 km/h, the Mercedes B Class is noticeable quicker – completing the sprint in 6.50 s, while the Mazda 3 Hatchback takes 8 s. That’s about 1.50 s faster.

There’s also a difference in torque: Mercedes B Class pulls clearly stronger with 450 Nm compared to 240 Nm. That’s about 210 Nm difference.

3 Hatchback

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 curb weight, Mercedes B Class is minimal lighter – 1405 kg compared to 1419 kg. The difference is around 14 kg.

In terms of boot space, the Mercedes B Class offers distinct more room – 455 L compared to 351 L. That’s a difference of about 104 L.

When it comes to payload, Mercedes B Class a bit takes the win – 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.

Mazda 3 Hatchback
Mercedes B Class

Costs and Consumption

View detailed analysis

Engine and Performance

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Dimensions and Body

View detailed analysis
from about £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
  • Electric Range : 83 km

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.

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Mercedes B Class

5 (4 Reviews)
rate

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
Mazda 3 Hatchback
Mercedes B Class

Costs and Consumption

Price
24500 - 35500 £
Price
33100 - 52500 £
Consumption L/100km
5.6 - 6.5 L
Consumption L/100km
2.5 - 6.9 L
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
83 km
Battery Capacity
-
Battery Capacity
12.90 kWh
co2
126 - 146 g/km
co2
56 - 156 g/km
Fuel tank capacity
-
Fuel tank capacity
35 - 51 L

Dimensions and Body

Body Type
Hatchback
Body Type
MPV
Seats
5
Seats
5
Doors
-
Doors
5
Curb weight
1419 - 1549 kg
Curb weight
1405 - 1745 kg
Trunk capacity
351 L
Trunk capacity
405 - 455 L
Length
-
Length
4419 mm
Width
1795 mm
Width
1796 mm
Height
-
Height
1562 mm
Max trunk capacity
-
Max trunk capacity
1440 - 1540 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
200 - 250 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
1998 - 2488 cm3
Engine capacity
1332 - 1991 cm3

General

Model Year
2025
Model Year
2024 - 2025
CO2 Efficiency Class
D, E
CO2 Efficiency Class
B, D, E, F
Brand
Mazda
Brand
Mercedes-Benz
What drivetrain options does the Mazda 3 Hatchback have?

The Mazda 3 Hatchback is available as Front-Wheel Drive or All-Wheel Drive.

The prices shown are estimates based on German list prices, adjusted for local VAT. Local registration taxes (e.g. NoVA, BPM or CO2 malus) are not included. This information is not legally binding.