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Mercedes A Class Saloon vs Audi A3 Limousine comparison

Compare performance (320 HP vs 400 HP), boot space and price (32,700 £ vs 27,700 £ ) at a glance. Find out which car is the better choice for you – Mercedes A Class Saloon or Audi A3 Limousine?

Mercedes A Class Saloon vs Audi A3 Limousine: Key differences

Mercedes A Class Saloon

  • considerably more efficient
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Audi A3 Limousine

  • a bit cheaper
  • somewhat more power
  • visibly quicker 0–100 km/h
  • only slightly lighter
  • barely more trunk space
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By Achim Sedelmaier

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

A Class Saloon

Costs and Efficiency:

Price and efficiency are often the first things buyers look at. Here it becomes clear which model has the long-term edge – whether at the pump, the plug, or in purchase price.

Audi A3 Limousine is a bit cheaper – starting at 27,700 £ , while the Mercedes A Class Saloon costs 32,700 £ . That’s a price difference of around 5,036 £.

Fuel consumption also shows a difference: the Mercedes A Class Saloon uses 0.7 L/100km and is considerably more efficient than the Audi A3 Limousine with 4.4 L/100km. The difference is about 3.7 L/100km.

A3 Limousine

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 Audi A3 Limousine offers somewhat more power – delivering 400 HP compared to 320 HP. That’s roughly 80 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A3 Limousine is visibly quicker – completing the sprint in 3.8 s, while the Mercedes A Class Saloon takes 4.8 s. That’s about 1 s quicker.

There’s also a difference in torque: the Audi A3 Limousine delivers barely more torque with 500 Nm compared to 450 Nm. That’s about 50 Nm more.

A Class Saloon

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 Limousine is only slightly lighter – 1,360 kg compared to 1,450 kg. The difference is around 90 kg.

Looking at boot space, the Audi A3 Limousine offers barely more boot space – 425 L compared to 395 L. That’s a difference of about 30 L.

When it comes to payload, the Mercedes A Class Saloon carries barely more – 490 kg compared to 480 kg. That’s a difference of about 10 kg.

Who wins the race in the data check?

The Mercedes A Class Saloon 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 £32,700
A Class Saloon

Mercedes A Class Saloon

  • Engine Type Plugin Hybrid, Petrol MHEV, Diesel
  • Transmission Automatic
  • Drive Type Front-Wheel Drive, All-Wheel Drive
  • Power HP 116 - 320 HP
  • Consumption L/100km 0.7 - 8.1 L/100km
  • Electric Range 88 km
Mercedes A Class Saloon
Audi A3 Limousine

Costs and Consumption

View detailed analysis

Engine and Performance

View detailed analysis

Dimensions and Body

View detailed analysis

Mercedes A Class Saloon

The Mercedes A‑Class Saloon blends compact practicality with premium flair, wrapping a surprisingly spacious interior in a slick, modern package that feels more grown-up than its hatchback sibling. It’s an ideal choice for city drivers who want Mercedes polish and cutting-edge tech without the ostentation of a larger saloon, and it even manages to make the daily commute feel a little bit special.

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Audi A3 Limousine

The Audi A3 sedan dresses up compact practicality in clean, premium lines, giving you the feel of an upscale small car with a proper boot. Inside it’s neat, driver-focused and nicely finished — a sensible, enjoyable daily companion that prefers poise over showy theatrics.

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Mercedes A Class Saloon
Audi A3 Limousine

Costs and Consumption

Price
32,700 - 55,900 £
Price
27,700 - 94,300 £
Consumption L/100km
0.7 - 8.1 L/100km
Consumption L/100km
4.4 - 9.2 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
88 km
Electric Range
-
Battery Capacity
12.9 kWh
Battery Capacity
-
co2
16 - 184 g/km
co2
115 - 208 g/km
Fuel tank capacity
35 - 51 L
Fuel tank capacity
-

Dimensions and Body

Body Type
Sedan
Body Type
Sedan
Seats
5
Seats
5
Doors
4
Doors
-
Curb weight
1,450 - 1,705 kg
Curb weight
1,360 - 1,640 kg
Trunk capacity
345 - 395 L
Trunk capacity
321 - 425 L
Length
4,558 - 4,570 mm
Length
-
Width
1,796 mm
Width
1,816 - 1,851 mm
Height
1,413 - 1,429 mm
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
475 - 490 kg
Payload
415 - 480 kg

Engine and Performance

Engine Type
Plugin Hybrid, Petrol MHEV, Diesel
Engine Type
Petrol, Petrol MHEV, Diesel
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 - 320 HP
Power HP
116 - 400 HP
Acceleration 0-100km/h
4.8 - 9.9 s
Acceleration 0-100km/h
3.8 - 10.1 s
Max Speed
206 - 250 km/h
Max Speed
-
Torque
200 - 450 Nm
Torque
220 - 500 Nm
Number of Cylinders
4
Number of Cylinders
4 - 5
Power kW
85 - 235 kW
Power kW
85 - 294 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
1,498 - 2,480 cm3

General

Model Year
2,024 - 2,025
Model Year
2,025 - 2,026
CO2 Efficiency Class
B, D, G, E
CO2 Efficiency Class
D, C, E, G
Brand
Mercedes-Benz
Brand
Audi
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.