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Audi A8 vs Mercedes GLA comparison

Compare performance (571 HP vs 421 HP), boot space and price (91,400 £ vs 38,800 £ ) at a glance. Find out which car is the better choice for you – Audi A8 or Mercedes GLA?

Audi A8 vs Mercedes GLA: Key differences

Audi A8

5 (1 Reviews)
rate
  • markedly more power
  • slightly quicker 0–100 km/h
details

Mercedes GLA

4.5 (4 Reviews)
rate
  • considerably cheaper
  • clearly more efficient
  • clearly more electric range
  • noticeably lighter
  • somewhat more trunk space
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

A8

Costs and Efficiency:

Looking at overall running costs, both models reveal some interesting differences in everyday economy.

Mercedes GLA is considerably cheaper – starting at 38,800 £ , while the Audi A8 costs 91,400 £ . That’s a price difference of around 52,535 £.

Fuel consumption also shows a difference: the Mercedes GLA uses 2.9 L/100km and is clearly more efficient than the Audi A8 with 4.6 L/100km. The difference is about 1.7 L/100km.

As for electric range, the Mercedes GLA offers clearly more range – reaching up to 74 km, about 16 km more than the Audi A8.

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 Audi A8 offers markedly more power – delivering 571 HP compared to 421 HP. That’s roughly 150 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A8 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.

There’s also a difference in torque: the Audi A8 delivers markedly more torque with 800 Nm compared to 500 Nm. That’s about 300 Nm more.

A8

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, Mercedes GLA is noticeably lighter – 1,570 kg compared to 2,035 kg. The difference is around 465 kg.

Looking at boot space, the Mercedes GLA offers somewhat more boot space – 435 L compared to 390 L. That’s a difference of about 45 L.

When it comes to payload, the Audi A8 carries noticeably more – 700 kg compared to 500 kg. That’s a difference of about 200 kg.

Who wins the race in the data check?

The Mercedes GLA 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 £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
details

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Audi A8
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi A8

The Audi A8 arrives with the kind of quiet authority that makes other limousines feel like they’re trying too hard, offering a cabin wrapped in subtle luxury and tech that never demands attention. For buyers who want composed comfort and discreet status, it’s the sensible splurge that turns daily commutes into a private parade.

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Reviews Audi A8

5 (1 Reviews)
rate

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)
rate
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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Mercedes GLA

Costs and Consumption
Price
91,400 - 134,900 £
Price
38,800 - 75,300 £
Consumption L/100km
4.6 - 11.5 L/100km
Consumption L/100km
2.9 - 9.5 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
58 km
Electric Range
74 km
Battery Capacity
-
Battery Capacity
-
co2
105 - 260 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
2,035 - 2,415 kg
Curb weight
1,570 - 1,810 kg
Trunk capacity
390 L
Trunk capacity
385 - 435 L
Length
-
Length
-
Width
1,945 mm
Width
1,834 - 1,849 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
525 - 700 kg
Payload
480 - 500 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel MHEV, Plugin Hybrid
Engine Type
Petrol MHEV, Plugin Hybrid, Diesel, Petrol
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
All-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
286 - 571 HP
Power HP
116 - 421 HP
Acceleration 0-100km/h
3.8 - 5.9 s
Acceleration 0-100km/h
4.3 - 11 s
Max Speed
-
Max Speed
-
Torque
500 - 800 Nm
Torque
230 - 500 Nm
Number of Cylinders
6 - 8
Number of Cylinders
4
Power kW
210 - 420 kW
Power kW
85 - 310 kW
Engine capacity
2,967 - 3,996 cm3
Engine capacity
1,332 - 1,991 cm3

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
G, C
CO2 Efficiency Class
E, F, B, G
Brand
Audi
Brand
Mercedes-Benz
What drive types are available for the Audi A8?

The Audi A8 is available as 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.