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Mercedes A Class vs MG MG3 comparison

Compare performance (421 HP vs 194 HP), boot space and price (32,600 £ vs 15,400 £ ) at a glance. Find out which car is the better choice for you – Mercedes A Class or MG MG3?

Mercedes A Class vs MG MG3: Key differences

Mercedes A Class

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

MG MG3

5 (1 Reviews)
rate
  • considerably cheaper
  • somewhat 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

A Class

Costs and Efficiency:

When it comes to price and running costs, the biggest differences usually appear. This is often where you see which car fits your budget better in the long run.

MG MG3 is considerably cheaper – starting at 15,400 £ , while the Mercedes A Class costs 32,600 £ . That’s a price difference of around 17,148 £.

Fuel consumption also shows a difference: the Mercedes A Class uses 2.3 L/100km and is significantly more efficient than the MG MG3 with 4.4 L/100km. The difference is about 2.1 L/100km.

MG3

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 substantially more power – delivering 421 HP compared to 194 HP. That’s roughly 227 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 MG MG3 takes 8 s. That’s about 4.1 s quicker.

There’s also a difference in torque: the Mercedes A Class delivers substantially more torque with 500 Nm compared to 148 Nm. That’s about 352 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, MG MG3 is somewhat lighter – 1,237 kg compared to 1,440 kg. The difference is around 203 kg.

When it comes to payload, the Mercedes A Class carries barely more – 485 kg compared to 448 kg. That’s a difference of about 37 kg.

Who wins the race in the data check?

The Mercedes A Class is far ahead 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 £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
Mercedes B Class
VS
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
MG MG3

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.

details
18C0292_008
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.

MG MG3

The MG3 is a cheeky city hatch that pairs bold, youthful styling with sprightly handling for drivers who want personality on a budget. Its cabin is bright and cleverly packaged, offering sensible space and a fun-to-drive character that turns mundane commutes into something a bit more enjoyable.

details
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Left-Back-30°-1
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Trunk-3

Reviews MG MG3

5 (1 Reviews)
rate
Giorgio catacchio
20 Sept 2025, 00:08:28

I've owned the MG3 Hybrid for a year — I travel a lot, never a dull moment; comes fully loaded as standard, incredible acceleration, etc.

Frequently compared as well

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MG ZS
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Renault Clio
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Mercedes A Class
MG MG3

Costs and Consumption
Price
32,600 - 66,500 £
Price
15,400 - 21,400 £
Consumption L/100km
2.3 - 9 L/100km
Consumption L/100km
4.4 - 6.1 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
85 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
53 - 205 g/km
co2
100 - 137 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Hatchback
Body Type
Hatchback
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,440 - 1,695 kg
Curb weight
1,237 - 1,285 kg
Trunk capacity
310 - 350 L
Trunk capacity
-
Length
-
Length
-
Width
1,796 - 1,850 mm
Width
1,797 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
450 - 485 kg
Payload
373 - 448 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel, Plugin Hybrid, Petrol
Engine Type
Petrol, Full Hybrid
Transmission
Automatic
Transmission
Manuel, Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Manual Gearbox, Automatic Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Front-Wheel Drive
Power HP
116 - 421 HP
Power HP
116 - 194 HP
Acceleration 0-100km/h
3.9 - 9.7 s
Acceleration 0-100km/h
8 - 10.8 s
Max Speed
-
Max Speed
-
Torque
200 - 500 Nm
Torque
148 Nm
Number of Cylinders
4
Number of Cylinders
4
Power kW
85 - 310 kW
Power kW
85 - 143 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
1,490 - 1,495 cm3

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
D, E, B, G
CO2 Efficiency Class
E, C
Brand
Mercedes-Benz
Brand
MG
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.