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Mercedes A Class vs Audi A3 Sportback comparison

Compare performance (421 HP vs 400 HP), boot space and price (32,600 £ vs 27,000 £ ) at a glance. Find out which car is the better choice for you – Mercedes A Class or Audi A3 Sportback?

Mercedes A Class vs Audi A3 Sportback: Key differences

Mercedes A Class

2.7 (1 Reviews)
rate
  • very slightly more power
details

Audi A3 Sportback

4.1 (2 Reviews)
rate
  • clearly cheaper
  • substantially more efficient
  • markedly more electric range
  • only slightly quicker 0–100 km/h
  • marginally lighter
  • marginally more trunk space
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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.

Audi A3 Sportback is clearly cheaper – starting at 27,000 £ , while the Mercedes A Class costs 32,600 £ . That’s a price difference of around 5,568 £.

Fuel consumption also shows a difference: the Audi A3 Sportback uses 1.1 L/100km and is substantially more efficient than the Mercedes A Class with 2.3 L/100km. The difference is about 1.2 L/100km.

As for electric range, the Audi A3 Sportback offers markedly more range – reaching up to 141 km, about 56 km more than the Mercedes A Class.

A3 Sportback

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 very slightly more power – delivering 421 HP compared to 400 HP. That’s roughly 21 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A3 Sportback is only slightly quicker – completing the sprint in 3.8 s, while the Mercedes A Class takes 3.9 s. That’s about 0.1 s quicker.

Both models offer the same torque – 500 Nm.

A Class

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, Audi A3 Sportback is marginally lighter – 1,360 kg compared to 1,440 kg. The difference is around 80 kg.

Looking at boot space, the Audi A3 Sportback offers marginally more boot space – 380 L compared to 350 L. That’s a difference of about 30 L.

When it comes to payload, the Mercedes A Class carries marginally more – 485 kg compared to 480 kg. That’s a difference of about 5 kg.

Who wins the race in the data check?

The Audi A3 Sportback is decisively ahead 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 £27,000
A3 Sportback

Audi A3 Sportback

  • Engine Type Petrol, Petrol MHEV, Diesel, Plugin Hybrid
  • Transmission Manuel, Automatic
  • Drive Type Front-Wheel Drive, All-Wheel Drive
  • Power HP 116 - 400 HP
  • Consumption L/100km 1.1 - 9.3 L/100km
  • Electric Range 134 - 141 km
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Frequently compared as well

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Mercedes A Class
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Mercedes A Class
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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

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

Audi A3 Sportback

The Audi A3 Sportback wraps premium materials and crisp German design into a practical hatchback package that makes daily driving feel smart rather than showy. It’s nimble in the city, composed on longer trips, and carries just enough swagger to satisfy buyers who want quality without shouting about it.

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Reviews Audi A3 Sportback

4.1 (2 Reviews)
rate

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

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Mercedes A Class
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Mercedes A Class
Audi A3 Sportback

Costs and Consumption
Price
32,600 - 66,500 £
Price
27,000 - 92,900 £
Consumption L/100km
2.3 - 9 L/100km
Consumption L/100km
1.1 - 9.3 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
85 km
Electric Range
134 - 141 km
Battery Capacity
-
Battery Capacity
-
co2
53 - 205 g/km
co2
25 - 211 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
1,360 - 1,685 kg
Trunk capacity
310 - 350 L
Trunk capacity
280 - 380 L
Length
-
Length
-
Width
1,796 - 1,850 mm
Width
1,816 - 1,851 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
450 - 485 kg
Payload
410 - 480 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel, Plugin Hybrid, Petrol
Engine Type
Petrol, Petrol MHEV, Diesel, Plugin Hybrid
Transmission
Automatic
Transmission
Manuel, Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
116 - 421 HP
Power HP
116 - 400 HP
Acceleration 0-100km/h
3.9 - 9.7 s
Acceleration 0-100km/h
3.8 - 10.1 s
Max Speed
-
Max Speed
-
Torque
200 - 500 Nm
Torque
220 - 500 Nm
Number of Cylinders
4
Number of Cylinders
4 - 5
Power kW
85 - 310 kW
Power kW
85 - 294 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
1,498 - 2,480 cm3

General
Model Year
2025
Model Year
2,025 - 2,026
CO2 Efficiency Class
D, E, B, G
CO2 Efficiency Class
D, F, E, G, B
Brand
Mercedes-Benz
Brand
Audi
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.