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Audi A6 Avant vs Mercedes C-Class Wagon – Performance, range & efficiency compared

Two cars, one duel: Audi A6 Avant meets Mercedes C-Class Wagon.
Which one wins in performance, efficiency and value for money? Find out now!

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

A6 Avant @ Audi AG

Costs and Efficiency:

Price and efficiency are often the first things buyers look at. Here it becomes clear which model has the long-term edge – whether at the pump, the plug, or in purchase price.

Mercedes C-Class Wagon has a to a small extent advantage in terms of price – it starts at 42400 £, while the Audi A6 Avant costs 49700 £. That’s a price difference of around 7272 £.

Fuel consumption also shows a difference: Mercedes C-Class Wagon manages with 0.40 L and is therefore decisively more efficient than the Audi A6 Avant with 2.30 L. The difference is about 1.90 L per 100 km.

As for range, the Mercedes C-Class Wagon performs slight better – achieving up to 112 km, about 11 km more than the Audi A6 Avant.

C-Class Wagon @ Mercedes-Benz Group Media

Engine and Performance:

Power, torque and acceleration are the classic benchmarks for car enthusiasts – and here, some clear differences start to show.

When it comes to engine power, the Mercedes C-Class Wagon has a convincingly edge – offering 680 HP compared to 367 HP. That’s roughly 313 HP more horsepower.

In acceleration from 0 to 100 km/h, the Mercedes C-Class Wagon is evident quicker – completing the sprint in 3.40 s, while the Audi A6 Avant takes 4.70 s. That’s about 1.30 s faster.

In terms of top speed, the Mercedes C-Class Wagon performs a bit better – reaching 280 km/h, while the Audi A6 Avant tops out at 250 km/h. The difference is around 30 km/h.

There’s also a difference in torque: Mercedes C-Class Wagon pulls clearly stronger with 1020 Nm compared to 550 Nm. That’s about 470 Nm difference.

A6 Avant @ Audi AG

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 C-Class Wagon is barely noticeable lighter – 1755 kg compared to 1865 kg. The difference is around 110 kg.

In terms of boot space, the Audi A6 Avant offers slight more room – 503 L compared to 490 L. That’s a difference of about 13 L.

In maximum load capacity, the Audi A6 Avant performs hardly perceptible better – up to 1534 L, which is about 24 L more than the Mercedes C-Class Wagon.

When it comes to payload, Audi A6 Avant barely noticeable takes the win – 570 kg compared to 565 kg. That’s a difference of about 5 kg.

Who wins the race?

The Mercedes C-Class Wagon proves to be outperforms in nearly all aspects and therefore becomes our DriveDuel Champion!
Mercedes C-Class Wagon is the better all-rounder in this comparison.

from about £42,400
C-Class Wagon @ Mercedes-Benz Group Media

Mercedes C-Class Wagon

  • Engine Type : Petrol MHEV, Plugin Hybrid, Diesel MHEV
  • Transmission : Automatic
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 186 - 680 HP
  • Consumption L/100km : 0.4 - 9 L
  • Electric Range : 11 - 112 km
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Audi A6 Avant

The Audi A6 Avant wraps executive poise and usable practicality into an impeccably finished estate that makes everyday driving feel noticeably more grown-up. It serves up a calm, composed ride and clever packaging for buyers who want space and refinement without ostentation — the sensible choice that still manages to impress.

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Mercedes C-Class Wagon

The Mercedes-Benz C-Class Wagon offers a perfect blend of luxury and practicality, appealing to those who value both style and functionality in their vehicle. Its elegant design is complemented by a spacious and versatile interior, making it ideal for family trips or business travel. With advanced safety features and state-of-the-art technology, this estate car provides a driving experience that is both secure and enjoyable.

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Costs and Consumption
Price
49700 - 70200 £
Price
42400 - 115300 £
Consumption L/100km
2.3 - 7.5 L
Consumption L/100km
0.4 - 9 L
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
94 - 101 km
Electric Range
11 - 112 km
Battery Capacity
20.70 kWh
Battery Capacity
19.50 kWh
co2
53 - 170 g/km
co2
11 - 206 g/km
Fuel tank capacity
46 - 60 L
Fuel tank capacity
40 - 66 L

Dimensions and Body
Body Type
Estate
Body Type
Estate
Seats
5
Seats
5
Doors
5
Doors
5
Curb weight
1865 - 2240 kg
Curb weight
1755 - 2235 kg
Trunk capacity
404 - 503 L
Trunk capacity
360 - 490 L
Length
4999 mm
Length
4751 - 4842 mm
Width
1875 mm
Width
1820 - 1900 mm
Height
1472 mm
Height
1454 - 1494 mm
Max trunk capacity
1423 - 1534 L
Max trunk capacity
1375 - 1510 L
Payload
535 - 570 kg
Payload
440 - 565 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV, Diesel MHEV, Plugin Hybrid
Engine Type
Petrol MHEV, Plugin Hybrid, Diesel MHEV
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Automatic Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
204 - 367 HP
Power HP
186 - 680 HP
Acceleration 0-100km/h
4.7 - 8.3 s
Acceleration 0-100km/h
3.4 - 8.8 s
Max Speed
238 - 250 km/h
Max Speed
226 - 280 km/h
Torque
340 - 550 Nm
Torque
250 - 1020 Nm
Number of Cylinders
4 - 6
Number of Cylinders
4
Power kW
150 - 270 kW
Power kW
137 - 500 kW
Engine capacity
1968 - 2995 cm3
Engine capacity
1496 - 1999 cm3

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

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Is the Audi A6 Avant offered with different drivetrains?

The Audi A6 Avant is available as Front-Wheel Drive or All-Wheel Drive.

The prices and data displayed are estimates based on German list prices and may vary by country. This information is not legally binding.