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Mercedes A Class vs BMW 3 Series Saloon comparison

Compare performance (421 HP vs 530 HP), boot space and price (32,600 £ vs 39,900 £ ) at a glance. Find out which car is the better choice for you – Mercedes A Class or BMW 3 Series Saloon?

Mercedes A Class vs BMW 3 Series Saloon: Key differences

Mercedes A Class

2.7 (1 Reviews)
rate
  • visibly cheaper
  • only slightly more efficient
  • very slightly lighter
details

BMW 3 Series Saloon

  • clearly more power
  • moderately more electric range
  • somewhat quicker 0–100 km/h
  • noticeably more trunk space
details

By Achim Sedelmaier

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

A Class

Costs and Efficiency:

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

Mercedes A Class is visibly cheaper – starting at 32,600 £ , while the BMW 3 Series Saloon costs 39,900 £ . That’s a price difference of around 7,374 £.

Fuel consumption also shows a difference: the Mercedes A Class uses 2.3 L/100km and is only slightly more efficient than the BMW 3 Series Saloon with 2.4 L/100km. The difference is about 0.1 L/100km.

As for electric range, the BMW 3 Series Saloon offers moderately more range – reaching up to 101 km, about 16 km more than the Mercedes A Class.

3 Series Saloon

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 BMW 3 Series Saloon offers clearly more power – delivering 530 HP compared to 421 HP. That’s roughly 109 HP more horsepower.

When accelerating from 0 to 100 km/h, the BMW 3 Series Saloon is somewhat quicker – completing the sprint in 3.5 s, while the Mercedes A Class takes 3.9 s. That’s about 0.4 s quicker.

There’s also a difference in torque: the BMW 3 Series Saloon delivers clearly more torque with 700 Nm compared to 500 Nm. That’s about 200 Nm more.

A Class

Space and Everyday Use:

Cabin size, boot volume and payload all play a role in everyday practicality. Here, comfort and flexibility make the difference.

Both vehicles offer seating for 5 people.

In terms of curb weight, Mercedes A Class is very slightly lighter – 1,440 kg compared to 1,575 kg. The difference is around 135 kg.

Looking at boot space, the BMW 3 Series Saloon offers noticeably more boot space – 480 L compared to 350 L. That’s a difference of about 130 L.

When it comes to payload, the BMW 3 Series Saloon carries very slightly more – 495 kg compared to 485 kg. That’s a difference of about 10 kg.

Who wins the race in the data check?

The BMW 3 Series Saloon is clearly superior 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 £39,900
3 Series Saloon

BMW 3 Series Saloon

  • Engine Type : Diesel MHEV, Petrol, Petrol MHEV, Plugin Hybrid
  • Transmission : Automatic, Manuel
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 150 - 530 HP
  • Consumption L/100km : 2.4 - 10.1 L/100km
  • Electric Range : 96 - 101 km
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Frequently compared as well

Mercedes A Class
Mercedes B 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 …
Mercedes A Class
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Mercedes A Class
BMW 3 Series Saloon

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

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.

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Reviews Mercedes A Class

2.7 (1 Reviews)
rate

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BMW 3 Series Saloon

The BMW 3 Series saloon is a driver's car in a suit, blending poised handling with a cabin that feels more premium than its practicality suggests. It’s composed enough for daily duties yet playful enough to keep weekend drives interesting, making it a sensible choice for buyers who still want to have fun.

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Reviews BMW 3 Series Saloon

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Mercedes A Class
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Mercedes A Class
Opel Corsa
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BMW 3 Series Saloon
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Mercedes A Class
MINI MINI
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Mercedes A Class
BMW 3 Series Saloon

Costs and Consumption
Price
32,600 - 66,500 £
Price
39,900 - 91,000 £
Consumption L/100km
2.3 - 9 L/100km
Consumption L/100km
2.4 - 10.1 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
85 km
Electric Range
96 - 101 km
Battery Capacity
-
Battery Capacity
-
co2
53 - 205 g/km
co2
54 - 227 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Hatchback
Body Type
Sedan
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,440 - 1,695 kg
Curb weight
1,575 - 1,960 kg
Trunk capacity
310 - 350 L
Trunk capacity
375 - 480 L
Length
-
Length
-
Width
1,796 - 1,850 mm
Width
1,827 - 1,903 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
450 - 485 kg
Payload
405 - 495 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel, Plugin Hybrid, Petrol
Engine Type
Diesel MHEV, Petrol, Petrol MHEV, Plugin Hybrid
Transmission
Automatic
Transmission
Automatic, Manuel
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Automatic Gearbox, Manual Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
116 - 421 HP
Power HP
150 - 530 HP
Acceleration 0-100km/h
3.9 - 9.7 s
Acceleration 0-100km/h
3.5 - 8.6 s
Max Speed
-
Max Speed
-
Torque
200 - 500 Nm
Torque
250 - 700 Nm
Number of Cylinders
4
Number of Cylinders
4 - 6
Power kW
85 - 310 kW
Power kW
110 - 390 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
1,995 - 2,998 cm3

General
Model Year
2025
Model Year
2,024 - 2,025
CO2 Efficiency Class
D, E, B, G
CO2 Efficiency Class
D, E, F, G, B
Brand
Mercedes-Benz
Brand
BMW
Is the Mercedes A Class offered with different drivetrains?

The Mercedes A Class is offered with 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.