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Audi A5 Sportback vs Mercedes GLS comparison

Compare performance (639 HP vs 634 HP), boot space and price (38700 £ vs 96100 £ ) at a glance. Find out which car is the better choice for you – Audi A5 Sportback or Mercedes GLS?

Audi A5 Sportback vs Mercedes GLS: Key differences

Audi A5 Sportback

  • convincingly cheaper
  • hardly perceptible more power
  • significantly more efficient
  • somewhat quicker from 0–100 km/h
  • significantly lighter
  • distinct more trunk space

Mercedes GLS

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

A5 Sportback

Costs and Efficiency:

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

Audi A5 Sportback has a convincingly advantage in terms of price – it starts at 38700 £ , while the Mercedes GLS costs 96100 £ . That’s a price difference of around 57378 £.

Fuel consumption also shows a difference: Audi A5 Sportback manages with 2 L and is therefore significantly more efficient than the Mercedes GLS with 7.80 L. The difference is about 5.80 L per 100 km.

GLS

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 A5 Sportback has a hardly perceptible edge – offering 639 HP compared to 634 HP. That’s roughly 5 HP more horsepower.

In acceleration from 0 to 100 km/h, the Audi A5 Sportback is somewhat quicker – completing the sprint in 3.70 s, while the Mercedes GLS takes 4.20 s. That’s about 0.50 s faster.

In terms of top speed, the Mercedes GLS performs slightly better – reaching 280 km/h, while the Audi A5 Sportback tops out at 250 km/h. The difference is around 30 km/h.

There’s also a difference in torque: Mercedes GLS pulls hardly perceptible stronger with 850 Nm compared to 825 Nm. That’s about 25 Nm difference.

A5 Sportback

Space and Everyday Use:

Cabin size, boot volume and payload all play a role in everyday practicality. Here, comfort and flexibility make the difference.

Seats: Mercedes GLS offers evident more seating capacity – 7 vs 5.

In curb weight, Audi A5 Sportback is significantly lighter – 1770 kg compared to 2550 kg. The difference is around 780 kg.

In terms of boot space, the Audi A5 Sportback offers distinct more room – 445 L compared to 355 L. That’s a difference of about 90 L.

In maximum load capacity, the Mercedes GLS performs clearly better – up to 2400 L, which is about 1101 L more than the Audi A5 Sportback.

When it comes to payload, Mercedes GLS noticeable takes the win – 695 kg compared to 530 kg. That’s a difference of about 165 kg.

Who wins the race in the data check?

The Audi A5 Sportback is clearly superior 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.

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Audi A5 Sportback
Mercedes GLS

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis
from about £38,700
A5 Sportback

Audi A5 Sportback

  • Engine Type : Plugin Hybrid, Petrol, Diesel MHEV, Petrol MHEV
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive, Front-Wheel Drive
  • Power HP : 150 - 639 HP
  • Consumption L/100km : 2 - 7.6 L
  • Electric Range : 84 - 110 km
details

Audi A5 Sportback

The Audi A5 Sportback dresses up sleek coupe proportions with the everyday sense of a practical hatchback, so you get striking looks without the compromises. Behind the wheel it balances poise and comfort with premium trimmings that make daily driving feel a little bit special — ideal for buyers who want style and substance in equal measure.

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Mercedes GLS

The GLS — usually just called the GLS — is Mercedes' flagship SUV, wrapping limousine-like comfort and commanding road presence into a smart, family-ready package. It pampers occupants with a hushed cabin, premium materials and intuitive tech, while still managing to feel confident and a little indulgent on the daily commute.

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Reviews Audi A5 Sportback

Reviews Mercedes GLS

Audi A5 Sportback
Mercedes GLS

Costs and Consumption
Price
38700 - 91000 £
Price
96100 - 208500 £
Consumption L/100km
2 - 7.6 L
Consumption L/100km
7.8 - 13.7 L
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
84 - 110 km
Electric Range
-
Battery Capacity
20.70 kWh
Battery Capacity
-
co2
45 - 172 g/km
co2
204 - 310 g/km
Fuel tank capacity
46 - 60 L
Fuel tank capacity
90 L

Dimensions and Body
Body Type
Hatchback
Body Type
SUV
Seats
4 - 5
Seats
7
Doors
5
Doors
5
Curb weight
1770 - 2430 kg
Curb weight
2550 - 2825 kg
Trunk capacity
331 - 445 L
Trunk capacity
355 L
Length
4829 - 4835 mm
Length
5208 - 5233 mm
Width
1860 - 1952 mm
Width
1956 mm
Height
1429 - 1444 mm
Height
1782 - 1838 mm
Max trunk capacity
1175 - 1299 L
Max trunk capacity
2400 L
Payload
475 - 530 kg
Payload
445 - 695 kg

Engine and Performance
Engine Type
Plugin Hybrid, Petrol, Diesel MHEV, Petrol MHEV
Engine Type
Petrol MHEV, Diesel MHEV
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic, Automatic Gearbox
Transmission Detail
Automatic Gearbox
Drive Type
All-Wheel Drive, Front-Wheel Drive
Drive Type
All-Wheel Drive
Power HP
150 - 639 HP
Power HP
333 - 634 HP
Acceleration 0-100km/h
3.7 - 9.8 s
Acceleration 0-100km/h
4.2 - 6.7 s
Max Speed
216 - 250 km/h
Max Speed
238 - 280 km/h
Torque
280 - 825 Nm
Torque
500 - 850 Nm
Number of Cylinders
4 - 6
Number of Cylinders
6 - 8
Power kW
110 - 470 kW
Power kW
245 - 466 kW
Engine capacity
1968 - 2995 cm3
Engine capacity
2989 - 3982 cm3

General
Model Year
2025 - 2026
Model Year
2024 - 2025
CO2 Efficiency Class
B, E, F, D
CO2 Efficiency Class
G
Brand
Audi
Brand
Mercedes-Benz

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Is the Audi A5 Sportback offered with different drivetrains?

Available configurations include All-Wheel Drive or Front-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.