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Mercedes C Class Sedan vs Audi A5 Avant comparison

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

Mercedes C Class Sedan vs Audi A5 Avant: Key differences

Mercedes C Class Sedan

  • very slightly cheaper
  • barely more power
  • very slightly quicker 0–100 km/h
  • barely lighter
  • visibly more trunk space
details

Audi A5 Avant

  • significantly more efficient
  • substantially more electric range
details

By Achim Sedelmaier

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

C Class Sedan

Costs and Efficiency:

Price and efficiency are key factors when choosing a car – and this is often where the real differences emerge.

Mercedes C Class Sedan is very slightly 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 significantly 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 substantially more range – reaching up to 108 km, about 97 km more than the Mercedes C Class Sedan.

A5 Avant

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 Mercedes C Class Sedan offers barely 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 very 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 moderately more torque with 1,020 Nm compared to 825 Nm. That’s about 195 Nm more.

C Class Sedan

Space and Everyday Use:

Beyond pure performance, interior space and usability matter most in daily life. This is where you see which car is more practical and versatile.

Both vehicles offer seating for 5 people.

In terms of curb weight, Mercedes C Class Sedan is barely 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 visibly 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
details

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Mercedes C Class Sedan
Audi A5 Avant

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

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

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

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Mercedes C Class Sedan
Audi A5 Avant

Costs and Consumption
Price
41,300 - 103,400 £
Price
41,600 - 92,400 £
Consumption L/100km
4.5 - 9 L/100km
Consumption L/100km
2.1 - 7.7 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
11 km
Electric Range
83 - 108 km
Battery Capacity
-
Battery Capacity
-
co2
119 - 205 g/km
co2
47 - 175 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Sedan
Body Type
Estate
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,695 - 2,165 kg
Curb weight
1,785 - 2,445 kg
Trunk capacity
455 L
Trunk capacity
361 L
Length
-
Length
-
Width
1,820 - 1,900 mm
Width
1,860 - 1,952 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
485 - 570 kg
Payload
480 - 535 kg

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

General
Model Year
2,024 - 2,025
Model Year
2,025 - 2,026
CO2 Efficiency Class
E, D, G
CO2 Efficiency Class
B, E, F, D
Brand
Mercedes-Benz
Brand
Audi
What drivetrain options does the Mercedes C Class Sedan have?

The Mercedes C Class Sedan is available as Rear-Wheel Drive or 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.