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Mazda 3 Sedan vs Mercedes A Class comparison

Compare performance (186 HP vs 421 HP), boot space and price (25,000 £ vs 32,600 £ ) at a glance. Find out which car is the better choice for you – Mazda 3 Sedan or Mercedes A Class?

Mazda 3 Sedan vs Mercedes A Class: Key differences

Mazda 3 Sedan

4.7 (1 Reviews)
rate
  • markedly cheaper
  • barely lighter
  • markedly more trunk space
details

Mercedes A Class

2.7 (1 Reviews)
rate
  • substantially more power
  • substantially more efficient
  • substantially quicker 0–100 km/h
details

By Achim Sedelmaier

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

3 Sedan

Costs and Efficiency:

Looking at overall running costs, both models reveal some interesting differences in everyday economy.

Mazda 3 Sedan is markedly cheaper – starting at 25,000 £ , while the Mercedes A Class costs 32,600 £ . That’s a price difference of around 7,591 £.

Fuel consumption also shows a difference: the Mercedes A Class uses 2.3 L/100km and is substantially more efficient than the Mazda 3 Sedan with 5.5 L/100km. The difference is about 3.2 L/100km.

A 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 A Class offers substantially more power – delivering 421 HP compared to 186 HP. That’s roughly 235 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes A Class is substantially quicker – completing the sprint in 3.9 s, while the Mazda 3 Sedan takes 8.1 s. That’s about 4.2 s quicker.

There’s also a difference in torque: the Mercedes A Class delivers significantly more torque with 500 Nm compared to 240 Nm. That’s about 260 Nm more.

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, Mazda 3 Sedan is barely lighter – 1,420 kg compared to 1,440 kg. The difference is around 20 kg.

Looking at boot space, the Mazda 3 Sedan offers markedly more boot space – 450 L compared to 350 L. That’s a difference of about 100 L.

When it comes to payload, the Mercedes A Class carries barely more – 485 kg compared to 481 kg. That’s a difference of about 4 kg.

Who wins the race in the data check?

The Mercedes A Class stands well ahead of its rival 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 £32,600
A Class

Mercedes A Class

  • Engine Type : Petrol MHEV, Diesel, Plugin Hybrid, Petrol
  • Transmission : Automatic
  • Drive Type : Front-Wheel Drive, All-Wheel Drive
  • Power HP : 116 - 421 HP
  • Consumption L/100km : 2.3 - 9 L/100km
  • Electric Range : 85 km
details

Frequently compared as well

Mercedes A Class
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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 …
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Mazda 3 Sedan
Mercedes A Class

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mazda 3 Sedan

The Mazda 3 Sedan dresses like a compact premium car, with sculpted lines and an interior that punches well above its class. It rewards drivers with eager handling and a composed, comfortable ride that turns routine runs into something a bit more enjoyable — proof that style and substance can share the same key.

details
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Reviews Mazda 3 Sedan

4.7 (1 Reviews)
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Mercedes A Class

The Mercedes A‑Class arrives as a compact charmer that dresses premium materials and a cockpit full of screens in a tidy, city-friendly package, delivering surprising agility and poise. For buyers who want a luxury badge, clever tech and a car that's equally happy in tight streets or on a spirited country run, the A‑Class offers a grown-up feel with a cheeky streak.

details
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18C0292_010
18C0292_042
18C0291_067
18C0122_04

Reviews Mercedes A Class

2.7 (1 Reviews)
rate

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

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Mazda 3 Sedan
Mercedes A Class

Costs and Consumption
Price
25,000 - 34,200 £
Price
32,600 - 66,500 £
Consumption L/100km
5.5 - 6.1 L/100km
Consumption L/100km
2.3 - 9 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
85 km
Battery Capacity
-
Battery Capacity
-
co2
123 - 135 g/km
co2
53 - 205 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Sedan
Body Type
Hatchback
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,420 - 1,492 kg
Curb weight
1,440 - 1,695 kg
Trunk capacity
450 L
Trunk capacity
310 - 350 L
Length
-
Length
-
Width
1,795 mm
Width
1,796 - 1,850 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
467 - 481 kg
Payload
450 - 485 kg

Engine and Performance
Engine Type
Petrol MHEV
Engine Type
Petrol MHEV, Diesel, Plugin Hybrid, Petrol
Transmission
Manuel, Automatic
Transmission
Automatic
Transmission Detail
Manual Gearbox, Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
Front-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
140 - 186 HP
Power HP
116 - 421 HP
Acceleration 0-100km/h
8.1 - 9.8 s
Acceleration 0-100km/h
3.9 - 9.7 s
Max Speed
-
Max Speed
-
Torque
238 - 240 Nm
Torque
200 - 500 Nm
Number of Cylinders
4
Number of Cylinders
4
Power kW
103 - 137 kW
Power kW
85 - 310 kW
Engine capacity
1,998 - 2,488 cm3
Engine capacity
1,332 - 1,991 cm3

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
D
CO2 Efficiency Class
D, E, B, G
Brand
Mazda
Brand
Mercedes-Benz
What drivetrain options does the Mazda 3 Sedan have?

The Mazda 3 Sedan is offered with 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.