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Audi A3 Limousine vs Mercedes GLA comparison

Compare performance (400 HP vs 421 HP), boot space and price (27700 £ vs 38800 £ ) 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

  • significantly cheaper
  • to a small extent quicker from 0–100 km/h
  • somewhat lighter

Mercedes GLA

4.6 (3 Reviews)
rate
  • slight more power
  • clearly more efficient
  • hardly perceptible more trunk space

All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.

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

A3 Limousine

Costs and Efficiency:

Price and efficiency are key factors when choosing a car – and this is often where the real differences emerge.

Audi A3 Limousine has a significantly advantage in terms of price – it starts at 27700 £ , while the Mercedes GLA costs 38800 £ . That’s a price difference of around 11151 £.

Fuel consumption also shows a difference: Mercedes GLA manages with 2.90 L and is therefore clearly more efficient than the Audi A3 Limousine with 4.40 L. The difference is about 1.50 L per 100 km.

GLA

Engine and Performance:

Power, torque and acceleration are the classic benchmarks for car enthusiasts – and here, some clear differences start to show.

When it comes to engine power, the Mercedes GLA has a slight edge – offering 421 HP compared to 400 HP. That’s roughly 21 HP more horsepower.

In acceleration from 0 to 100 km/h, the Audi A3 Limousine is to a small extent quicker – completing the sprint in 3.80 s, while the Mercedes GLA takes 4.30 s. That’s about 0.50 s faster.

Both models offer the same torque – 500 Nm.

A3 Limousine

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 curb weight, Audi A3 Limousine is somewhat lighter – 1360 kg compared to 1570 kg. The difference is around 210 kg.

In terms of boot space, the Mercedes GLA offers hardly perceptible more room – 435 L compared to 425 L. That’s a difference of about 10 L.

When it comes to payload, Mercedes GLA barely noticeable takes the win – 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 is slightly 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.

Frequently compared as well

Mercedes B Class
Mercedes GLA
VS
The Mercedes B‑Class is the practical, airy people‑carrier that prioritises space and comfort, while the Mercedes GLA takes the same mechanical smarts and adds SUV looks, higher ride height and a touch more road presence. Pick the B‑Class for family‑friendly sense and efficiency, choose the GLA if …
Mercedes A Class
Mercedes GLA
VS
The Mercedes A‑Class is the sharper, more driver-focused hatch that feels nimble and refined on twisty roads, while the Mercedes GLA trades a bit of agility for SUV practicality with a higher ride height, extra luggage space and a commanding view of the road. Pick the A‑Class for sporty handling, …
Audi A3 Limousine
Mercedes GLA

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis
from about £38,800
GLA

Mercedes GLA

  • Engine Type : Plugin Hybrid, Petrol MHEV, 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
  • Electric Range : 74 km
details

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.

details
A203794_overfull
A202500_overfull
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Mercedes GLA

4.6 (3 Reviews)
rate

The Mercedes GLA blends Mercedes style with compact crossover practicality, looking sharper than its size suggests while still feeling purposeful around town. Inside it serves up premium materials and tech-forward ergonomics, and the composed ride makes it an appealing pick for buyers who want luxury wrapped in a city-friendly package with a wink of adventurous spirit.

details
20C0047_067
20C0047_071
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Reviews Audi A3 Limousine

Reviews Mercedes GLA

4.6 (3 Reviews)
rate
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
Audi A3 Limousine
Mercedes GLA

Costs and Consumption
Price
27700 - 58300 £
Price
38800 - 75300 £
Consumption L/100km
4.4 - 9.2 L
Consumption L/100km
2.9 - 9.5 L
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
74 km
Battery Capacity
-
Battery Capacity
12.90 kWh
co2
115 - 208 g/km
co2
66 - 216 g/km
Fuel tank capacity
-
Fuel tank capacity
35 L

Dimensions and Body
Body Type
Sedan
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
5
Curb weight
1360 - 1640 kg
Curb weight
1570 - 1810 kg
Trunk capacity
321 - 425 L
Trunk capacity
385 - 435 L
Length
-
Length
4412 mm
Width
1816 - 1851 mm
Width
1834 - 1849 mm
Height
-
Height
1616 mm
Max trunk capacity
-
Max trunk capacity
1385 L
Payload
415 - 480 kg
Payload
480 - 500 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV, Diesel
Engine Type
Plugin Hybrid, Petrol MHEV, 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
210 km/h
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
1498 - 2480 cm3
Engine capacity
1332 - 1991 cm3

General
Model Year
2025
Model Year
2024 - 2025
CO2 Efficiency Class
D, C, E, G
CO2 Efficiency Class
B, E, F, G
Brand
Audi
Brand
Mercedes-Benz

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Is the Audi A3 Limousine offered with different drivetrains?

The Audi A3 Limousine is offered with Front-Wheel Drive or All-Wheel Drive.

The prices shown are estimates based on German list prices, adjusted for local VAT. Local registration taxes (e.g. NoVA, BPM or CO2 malus) are not included. This information is not legally binding.