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Audi A8 vs Mercedes GLA comparison

Compare performance (571 HP vs 421 HP), boot space and price (91400 £ vs 38800 £ ) 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
  • distinct more power
  • a bit quicker from 0–100 km/h
  • somewhat more trunk space

Mercedes GLA

4.6 (3 Reviews)
rate
  • decisively cheaper
  • significantly more efficient
  • noticeable more electric range
  • clearly perceptible lighter

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

A8

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.

Mercedes GLA has a decisively advantage in terms of price – it starts at 38800 £ , while the Audi A8 costs 91400 £ . That’s a price difference of around 52535 £.

Fuel consumption also shows a difference: Mercedes GLA manages with 2.90 L and is therefore significantly more efficient than the Audi A8 with 4.60 L. The difference is about 1.70 L per 100 km.

As for electric range, the Mercedes GLA performs noticeable better – achieving up to 74 km, about 16 km more than the Audi A8.

GLA

Engine and Performance:

Power, torque and acceleration say a lot about how a car feels on the road. This is where you see which model delivers more driving dynamics.

When it comes to engine power, the Audi A8 has a distinct edge – offering 571 HP compared to 421 HP. That’s roughly 150 HP more horsepower.

In acceleration from 0 to 100 km/h, the Audi A8 is a bit quicker – completing the sprint in 3.80 s, while the Mercedes GLA takes 4.30 s. That’s about 0.50 s faster.

In terms of top speed, the Audi A8 performs a bit better – reaching 250 km/h, while the Mercedes GLA tops out at 210 km/h. The difference is around 40 km/h.

There’s also a difference in torque: Audi A8 pulls evident stronger with 800 Nm compared to 500 Nm. That’s about 300 Nm difference.

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 curb weight, Mercedes GLA is clearly perceptible lighter – 1570 kg compared to 2035 kg. The difference is around 465 kg.

In terms of boot space, the Audi A8 offers somewhat more room – 505 L compared to 435 L. That’s a difference of about 70 L.

When it comes to payload, Audi A8 clearly perceptible takes the win – 700 kg compared to 500 kg. That’s a difference of about 200 kg.

Who wins the race in the data check?

The Audi A8 sits just ahead overall 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 A8
Mercedes GLA

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis
from about £91,400
A8

Audi A8

  • Engine Type : Petrol MHEV, Diesel MHEV, Plugin Hybrid
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive
  • Power HP : 286 - 571 HP
  • Consumption L/100km : 4.6 - 11.5 L
  • Electric Range : 58 km
details

Audi A8

5 (1 Reviews)
rate

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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Mercedes GLA

4.6 (3 Reviews)
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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
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Reviews Audi A8

5 (1 Reviews)
rate

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 A8
Mercedes GLA

Costs and Consumption
Price
91400 - 134900 £
Price
38800 - 75300 £
Consumption L/100km
4.6 - 11.5 L
Consumption L/100km
2.9 - 9.5 L
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
58 km
Electric Range
74 km
Battery Capacity
-
Battery Capacity
12.90 kWh
co2
105 - 260 g/km
co2
66 - 216 g/km
Fuel tank capacity
82 L
Fuel tank capacity
35 L

Dimensions and Body
Body Type
Sedan
Body Type
SUV
Seats
5
Seats
5
Doors
4
Doors
5
Curb weight
2035 - 2415 kg
Curb weight
1570 - 1810 kg
Trunk capacity
390 - 505 L
Trunk capacity
385 - 435 L
Length
5190 - 5320 mm
Length
4412 mm
Width
1945 mm
Width
1834 - 1849 mm
Height
1473 - 1488 mm
Height
1616 mm
Max trunk capacity
-
Max trunk capacity
1385 L
Payload
525 - 700 kg
Payload
480 - 500 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel MHEV, Plugin Hybrid
Engine Type
Plugin Hybrid, Petrol MHEV, 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
250 km/h
Max Speed
210 km/h
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
2967 - 3996 cm3
Engine capacity
1332 - 1991 cm3

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

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Is the Audi A8 offered with different drivetrains?

The Audi A8 is offered with 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.