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BMW X3 vs Mercedes A Class comparison

Compare performance (398 HP vs 421 HP), boot space and price (51,700 £ vs 32,600 £ ) at a glance. Find out which car is the better choice for you – BMW X3 or Mercedes A Class?

BMW X3 vs Mercedes A Class: Key differences

BMW X3

3.5 (2 Reviews)
rate
  • very slightly more electric range
  • noticeably more trunk space
details

Mercedes A Class

3.6 (2 Reviews)
rate
  • significantly cheaper
  • only slightly more power
  • noticeably more efficient
  • moderately quicker 0–100 km/h
  • clearly lighter
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

X3

Costs and Efficiency:

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

Mercedes A Class is significantly cheaper – starting at 32,600 £ , while the BMW X3 costs 51,700 £ . That’s a price difference of around 19,117 £.

Fuel consumption also shows a difference: the Mercedes A Class uses 2.3 L/100km and is noticeably more efficient than the BMW X3 with 2.8 L/100km. The difference is about 0.5 L/100km.

As for electric range, the BMW X3 offers very slightly more range – reaching up to 88 km, about 3 km more than the Mercedes A Class.

A Class

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 Mercedes A Class offers only slightly more power – delivering 421 HP compared to 398 HP. That’s roughly 23 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes A Class is moderately quicker – completing the sprint in 3.9 s, while the BMW X3 takes 4.6 s. That’s about 0.7 s quicker.

There’s also a difference in torque: the BMW X3 delivers visibly more torque with 670 Nm compared to 500 Nm. That’s about 170 Nm more.

X3

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 terms of curb weight, Mercedes A Class is clearly lighter – 1,440 kg compared to 1,930 kg. The difference is around 490 kg.

Looking at boot space, the BMW X3 offers noticeably more boot space – 570 L compared to 350 L. That’s a difference of about 220 L.

When it comes to payload, the BMW X3 carries a bit more – 570 kg compared to 485 kg. That’s a difference of about 85 kg.

Who wins the race in the data check?

The Mercedes A Class has only a minor advantage 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

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Mercedes A Class

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

BMW X3

The BMW X3 blends sporty handling with premium comfort, making it a strong choice for drivers who want an engaging everyday SUV. Its well-appointed interior and confident road manners give it broad appeal for families and commuters who value style and versatility.

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Reviews BMW X3

3.5 (2 Reviews)
rate
Franck
3 Aug 2026, 09:01:46

I've been driving an X3 30e for a year. Vibration problems that BMW can't resolve and ultimately considers everything normal, even though an independent assessment says otherwise.
Too firm despite the adaptive suspension (20-inch wheels).
Excessive road/rolling noise.
Finish and presentation quality deplorable for a vehicle at this price.
The personal assistant is less effective than on my previous X3 (G01).

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

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
18C0292_008
18C0292_010
18C0292_042
18C0291_067
18C0122_04

Reviews Mercedes A Class

3.6 (2 Reviews)
rate
Koldo
14 Jul 2026, 15:39:26

It's an elegant and understated car. Excellent material finishes; its two screens are very convenient for driving. Very good acceleration and braking response, great stability and good handling in corners. Good nighttime lighting, a safe, comfortable car and a pleasure to drive and travel in. My car is the A‑Class 200d. Kind regards.

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

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Mercedes A Class

Costs and Consumption
Price
51,700 - 73,000 £
Price
32,600 - 66,500 £
Consumption L/100km
2.8 - 7.7 L/100km
Consumption L/100km
2.3 - 9 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
88 km
Electric Range
85 km
Battery Capacity
-
Battery Capacity
-
co2
64 - 175 g/km
co2
53 - 205 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
Hatchback
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,930 - 2,140 kg
Curb weight
1,440 - 1,695 kg
Trunk capacity
460 - 570 L
Trunk capacity
310 - 350 L
Length
-
Length
-
Width
1,920 mm
Width
1,796 - 1,850 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
570 kg
Payload
450 - 485 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel MHEV, Plugin Hybrid
Engine Type
Petrol MHEV, Diesel, Plugin Hybrid, Petrol
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
All-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
197 - 398 HP
Power HP
116 - 421 HP
Acceleration 0-100km/h
4.6 - 7.8 s
Acceleration 0-100km/h
3.9 - 9.7 s
Max Speed
-
Max Speed
-
Torque
330 - 670 Nm
Torque
200 - 500 Nm
Number of Cylinders
4 - 6
Number of Cylinders
4
Power kW
145 - 293 kW
Power kW
85 - 310 kW
Engine capacity
1,995 - 2,998 cm3
Engine capacity
1,332 - 1,991 cm3

General
Model Year
2,024 - 2,025
Model Year
2025
CO2 Efficiency Class
F, E, B
CO2 Efficiency Class
D, E, B, G
Brand
BMW
Brand
Mercedes-Benz
Is the BMW X3 offered with different drivetrains?

The BMW X3 is offered with 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.