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Audi A5 Avant vs Mercedes C Class Sedan comparison

Compare performance (639 HP vs 680 HP), boot space and price (41,600 £ vs 41,300 £ ) at a glance. Find out which car is the better choice for you – Audi A5 Avant or Mercedes C Class Sedan?

Audi A5 Avant vs Mercedes C Class Sedan: Key differences

Audi A5 Avant

4.4 (1 Reviews)
rate
  • considerably more efficient
  • clearly more electric range
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Mercedes C Class Sedan

  • marginally cheaper
  • marginally more power
  • only slightly quicker 0–100 km/h
  • very slightly lighter
  • 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:

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 C Class Sedan is marginally cheaper – starting at 41,300 £ , while the Audi A5 Avant costs 41,600 £ . That’s a price difference of around 289 £.

Fuel consumption also shows a difference: the Audi A5 Avant uses 2.1 L/100km and is considerably more efficient than the Mercedes C Class Sedan with 4.5 L/100km. The difference is about 2.4 L/100km.

As for electric range, the Audi A5 Avant offers clearly more range – reaching up to 108 km, about 97 km more than the Mercedes C Class Sedan.

C Class Sedan

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 Mercedes C Class Sedan offers marginally more power – delivering 680 HP compared to 639 HP. That’s roughly 41 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes C Class Sedan is only slightly quicker – completing the sprint in 3.4 s, while the Audi A5 Avant takes 3.7 s. That’s about 0.3 s quicker.

There’s also a difference in torque: the Mercedes C Class Sedan delivers a bit more torque with 1,020 Nm compared to 825 Nm. That’s about 195 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, Mercedes C Class Sedan is very slightly lighter – 1,695 kg compared to 1,785 kg. The difference is around 90 kg.

Looking at boot space, the Mercedes C Class Sedan offers noticeably more boot space – 455 L compared to 361 L. That’s a difference of about 94 L.

When it comes to payload, the Mercedes C Class Sedan carries only slightly more – 570 kg compared to 535 kg. That’s a difference of about 35 kg.

Who wins the race in the data check?

The Audi A5 Avant holds a decisive overall lead 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

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Mercedes C Class Sedan

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 C Class Sedan

The Mercedes C‑Class is the compact executive that dresses like it owns the boulevard, with an interior that blends modern elegance and plush comfort to make everyday driving feel unexpectedly special. On the road it pairs poise with a hint of cheeky agility, rewarding drivers who want refinement without forfeiting a touch of fun — and yes, it still looks great in the driveway.

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Reviews Mercedes C Class Sedan

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Audi A5 Avant
Mercedes C Class Sedan

Costs and Consumption
Price
41,600 - 92,400 £
Price
41,300 - 103,400 £
Consumption L/100km
2.1 - 7.7 L/100km
Consumption L/100km
4.5 - 9 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
83 - 108 km
Electric Range
11 km
Battery Capacity
-
Battery Capacity
-
co2
47 - 175 g/km
co2
119 - 205 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
1,695 - 2,165 kg
Trunk capacity
361 L
Trunk capacity
455 L
Length
-
Length
-
Width
1,860 - 1,952 mm
Width
1,820 - 1,900 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
480 - 535 kg
Payload
485 - 570 kg

Engine and Performance
Engine Type
Plugin Hybrid, Petrol, Diesel MHEV, Petrol MHEV
Engine Type
Petrol MHEV, Diesel MHEV, Plugin Hybrid
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
Rear-Wheel Drive, All-Wheel Drive
Power HP
150 - 639 HP
Power HP
183 - 680 HP
Acceleration 0-100km/h
3.7 - 9.8 s
Acceleration 0-100km/h
3.4 - 8.6 s
Max Speed
-
Max Speed
-
Torque
280 - 825 Nm
Torque
250 - 1,020 Nm
Number of Cylinders
4 - 6
Number of Cylinders
4
Power kW
110 - 470 kW
Power kW
135 - 500 kW
Engine capacity
1,968 - 2,995 cm3
Engine capacity
1,496 - 1,999 cm3

General
Model Year
2,025 - 2,026
Model Year
2,024 - 2,025
CO2 Efficiency Class
B, E, F, D
CO2 Efficiency Class
E, D, G
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.