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Audi A5 Avant vs Mercedes S-Class comparison

Compare performance (639 HP vs 635 HP), boot space and price (41,600 £ vs 104,000 £ ) at a glance. Find out which car is the better choice for you – Audi A5 Avant or Mercedes S-Class?

Audi A5 Avant vs Mercedes S-Class: Key differences

Audi A5 Avant

4.4 (1 Reviews)
rate
  • considerably cheaper
  • very slightly more power
  • very slightly more efficient
  • only slightly quicker 0–100 km/h
  • markedly lighter
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Mercedes S-Class

  • marginally more electric range
  • noticeably 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

A5 Avant

Costs and Efficiency:

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

Audi A5 Avant is considerably cheaper – starting at 41,600 £ , while the Mercedes S-Class costs 104,000 £ . That’s a price difference of around 62,405 £.

Fuel consumption also shows a difference: the Audi A5 Avant uses 2.1 L/100km and is very slightly more efficient than the Mercedes S-Class with 2.2 L/100km. The difference is about 0.1 L/100km.

As for electric range, the Mercedes S-Class offers marginally more range – reaching up to 118 km, about 10 km more than the Audi A5 Avant.

S-Class

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 A5 Avant offers very slightly more power – delivering 639 HP compared to 635 HP. That’s roughly 4 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A5 Avant is only slightly quicker – completing the sprint in 3.7 s, while the Mercedes S-Class takes 4 s. That’s about 0.3 s quicker.

There’s also a difference in torque: the Mercedes S-Class delivers marginally more torque with 850 Nm compared to 825 Nm. That’s about 25 Nm more.

A5 Avant

Space and Everyday Use:

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

Both vehicles offer seating for 5 people.

In terms of curb weight, Audi A5 Avant is markedly lighter – 1,785 kg compared to 2,165 kg. The difference is around 380 kg.

Looking at boot space, the Mercedes S-Class offers noticeably more boot space – 530 L compared to 361 L. That’s a difference of about 169 L.

When it comes to payload, the Mercedes S-Class carries moderately more – 660 kg compared to 535 kg. That’s a difference of about 125 kg.

Who wins the race in the data check?

The Audi A5 Avant 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.

from £41,600
A5 Avant

Audi A5 Avant

  • 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 2.1 - 7.7 L/100km
  • Electric Range 83 - 108 km
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Frequently compared as well

Audi A5 Avant
Audi A6 Avant
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Audi A5 Avant
Mercedes S-Class

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi A5 Avant

The Audi A5 Avant dresses like a sleek coupe but carries like a sensible estate, offering buyers a rare blend of glamour and everyday practicality. Inside, the cabin feels beautifully sorted and the drive is composed and engaging, making routine errands feel a touch more enjoyable than they have any right to be.

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Reviews Audi A5 Avant

4.4 (1 Reviews)
rate
Hje
10 May 2026, 10:01:51

I do a lot of highway and generally long distance driving where A5 is superior to BMW 3.

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

Mercedes S-Class

The Mercedes S-Class wraps peerless comfort, whisper-quiet luxury and subtle tech wizardry into a chauffeur-ready package that still knows how to engage the driver. It’s the car for buyers who want to arrive relaxed, be taken seriously and occasionally enjoy a grin when the road reminds them this limousine can dance.

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Reviews Mercedes S-Class

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Mercedes S-Class

Costs and Consumption
Price
41,600 - 92,400 £
Price
104,000 - 201,400 £
Consumption L/100km
2.1 - 7.7 L/100km
Consumption L/100km
2.2 - 11 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
83 - 108 km
Electric Range
98 - 118 km
Battery Capacity
-
Battery Capacity
-
co2
47 - 175 g/km
co2
50 - 252 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Estate
Body Type
Sedan
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,785 - 2,445 kg
Curb weight
2,165 - 2,650 kg
Trunk capacity
361 L
Trunk capacity
345 - 530 L
Length
-
Length
-
Width
1,860 - 1,952 mm
Width
1,921 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
480 - 535 kg
Payload
420 - 660 kg

Engine and Performance
Engine Type
Plugin Hybrid, Petrol, Diesel MHEV, Petrol MHEV
Engine Type
Petrol MHEV, Plugin Hybrid, 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, Rear-Wheel Drive
Power HP
150 - 639 HP
Power HP
336 - 635 HP
Acceleration 0-100km/h
3.7 - 9.8 s
Acceleration 0-100km/h
4 - 5.7 s
Max Speed
-
Max Speed
-
Torque
280 - 825 Nm
Torque
560 - 850 Nm
Number of Cylinders
4 - 6
Number of Cylinders
6 - 8
Power kW
110 - 470 kW
Power kW
247 - 467 kW
Engine capacity
1,968 - 2,995 cm3
Engine capacity
2,989 - 3,982 cm3

General
Model Year
2,025 - 2,026
Model Year
2026
CO2 Efficiency Class
B, E, F, D
CO2 Efficiency Class
G, B, F
Brand
Audi
Brand
Mercedes-Benz
What drive types are available for the Audi A5 Avant?

Available configurations include All-Wheel Drive or Front-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.