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Audi A3 Limousine vs Mercedes GLA comparison

Compare performance (400 HP vs 421 HP), boot space and price (27,700 £ vs 38,800 £ ) at a glance. Find out which car is the better choice for you – Audi A3 Limousine or Mercedes GLA?

Audi A3 Limousine vs Mercedes GLA: Key differences

Audi A3 Limousine

  • clearly cheaper
  • slightly quicker 0–100 km/h
  • slightly lighter
details

Mercedes GLA

4.5 (4 Reviews)
rate
  • barely more power
  • clearly more efficient
  • very slightly more trunk space
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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

A3 Limousine

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 Limousine is clearly cheaper – starting at 27,700 £ , while the Mercedes GLA costs 38,800 £ . That’s a price difference of around 11,151 £.

Fuel consumption also shows a difference: the Mercedes GLA uses 2.9 L/100km and is clearly more efficient than the Audi A3 Limousine with 4.4 L/100km. The difference is about 1.5 L/100km.

GLA

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 GLA offers barely 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 Limousine is slightly quicker – completing the sprint in 3.8 s, while the Mercedes GLA takes 4.3 s. That’s about 0.5 s quicker.

Both models offer the same torque – 500 Nm.

A3 Limousine

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 slightly lighter – 1,360 kg compared to 1,570 kg. The difference is around 210 kg.

Looking at boot space, the Mercedes GLA offers very slightly more boot space – 435 L compared to 425 L. That’s a difference of about 10 L.

When it comes to payload, the Mercedes GLA carries very slightly more – 500 kg compared to 480 kg. That’s a difference of about 20 kg.

Who wins the race in the data check?

The Mercedes GLA holds a narrow overall lead 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 £38,800
GLA

Mercedes GLA

  • Engine Type Petrol MHEV, Plugin Hybrid, Diesel, Petrol
  • Transmission Automatic
  • Drive Type Front-Wheel Drive, All-Wheel Drive
  • Power HP 116 - 421 HP
  • Consumption L/100km 2.9 - 9.5 L/100km
  • Electric Range 74 km
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Audi A3 Limousine
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

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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Reviews Audi A3 Limousine

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

Mercedes GLA

The Mercedes GLA is a compact luxury crossover that brings Mercedes-Benz's refined design and premium cabin materials into a practical, city-friendly package. It combines comfortable ride quality and intuitive tech with poised handling, making it a confident choice for everyday driving and longer journeys.

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Reviews Mercedes GLA

4.5 (4 Reviews)
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Lucien
1 May 2026, 07:12:24

GLA 180 petrol. Ideal for city and highway. Very smooth and quiet. The automatic gearbox is a delight. Average consumption 6.2 L/100 km. Special edition 180 Cyber Edition, leather seats....

How do you mainly use this car? (optional): Family car
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Gutter
24 Feb 2026, 21:53:27

Super nimble, very impressive power from this 1,300cc mild‑hybrid engine — in town, on the road and on the motorway for this 2025 GLA 180 Style AMG... premium interior!

How do you mainly use this car? (optional): Family car
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Serge
16 Jan 2026, 16:09:11

You have to compare like with like — the GLA should be compared to the Q3, not the Q2 as in your study!

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

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Audi A3 Limousine
Mercedes GLA

Costs and Consumption
Price
27,700 - 94,300 £
Price
38,800 - 75,300 £
Consumption L/100km
4.4 - 9.2 L/100km
Consumption L/100km
2.9 - 9.5 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
74 km
Battery Capacity
-
Battery Capacity
-
co2
115 - 208 g/km
co2
66 - 216 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Sedan
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,360 - 1,640 kg
Curb weight
1,570 - 1,810 kg
Trunk capacity
321 - 425 L
Trunk capacity
385 - 435 L
Length
-
Length
-
Width
1,816 - 1,851 mm
Width
1,834 - 1,849 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
415 - 480 kg
Payload
480 - 500 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV, Diesel
Engine Type
Petrol MHEV, Plugin Hybrid, Diesel, Petrol
Transmission
Manuel, Automatic
Transmission
Automatic
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Transmission Detail
Dual-Clutch Automatic
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
116 - 400 HP
Power HP
116 - 421 HP
Acceleration 0-100km/h
3.8 - 10.1 s
Acceleration 0-100km/h
4.3 - 11 s
Max Speed
-
Max Speed
-
Torque
220 - 500 Nm
Torque
230 - 500 Nm
Number of Cylinders
4 - 5
Number of Cylinders
4
Power kW
85 - 294 kW
Power kW
85 - 310 kW
Engine capacity
1,498 - 2,480 cm3
Engine capacity
1,332 - 1,991 cm3

General
Model Year
2,025 - 2,026
Model Year
2025
CO2 Efficiency Class
D, C, E, G
CO2 Efficiency Class
E, F, B, G
Brand
Audi
Brand
Mercedes-Benz
What drive types are available for the Audi A3 Limousine?

The Audi A3 Limousine is available as 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.