@ Audi AG
@ Mercedes-Benz Group Media
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Audi A6 Limousine vs Mercedes C-Class Sedan – Performance, range & efficiency compared

Everyday use, family trips or long-distance drives – here’s where the differences show.
Discover whether Audi A6 Limousine or Mercedes C-Class Sedan fits your lifestyle better.

Audi A6 Limousine

Mercedes C-Class Sedan

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

A6 Limousine @ 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 Sedan has a to a small extent advantage in terms of price – it starts at 41200 £, while the Audi A6 Limousine costs 47600 £. That’s a price difference of around 6405 £.

Fuel consumption also shows a difference: Mercedes C-Class Sedan manages with 1.60 L and is therefore distinct more efficient than the Audi A6 Limousine with 2.20 L. The difference is about 0.60 L per 100 km.

As for range, the Mercedes C-Class Sedan performs a bit better – achieving up to 117 km, about 12 km more than the Audi A6 Limousine.

C-Class Sedan @ 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 Sedan has a significantly 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 Sedan is clearly perceptible quicker – completing the sprint in 3.40 s, while the Audi A6 Limousine takes 4.70 s. That’s about 1.30 s faster.

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

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

A6 Limousine @ Audi AG

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 curb weight, Mercedes C-Class Sedan is minimal lighter – 1695 kg compared to 1845 kg. The difference is around 150 kg.

In terms of boot space, the Audi A6 Limousine offers slight more room – 492 L compared to 455 L. That’s a difference of about 37 L.

When it comes to payload, Audi A6 Limousine hardly perceptible takes the win – 625 kg compared to 570 kg. That’s a difference of about 55 kg.

Who comes out on top?

Overall, the Mercedes C-Class Sedan shows itself to be wins the duel decisively and secures the title of DriveDuel Champion.
It convinces with the more balanced overall package and proves to be the more versatile choice for everyday use.

Audi A6 Limousine
Mercedes C-Class Sedan

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis
from about £41,200
C-Class Sedan @ Mercedes-Benz Group Media

Mercedes C-Class Sedan

  • Engine Type : Petrol MHEV, Plugin Hybrid, Diesel MHEV
  • Transmission : Automatic
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 183 - 680 HP
  • Consumption L/100km : 1.6 - 9 L
  • Electric Range : 11 - 117 km
details

Audi A6 Limousine

The Audi A6 cuts a clean, purposeful silhouette with an interior that feels like a quiet, high-tech office on wheels—luxurious materials and clever gadgets make long journeys surprisingly pleasant. It balances composed, confident driving with enough flair to keep you entertained, making it a sensible choice for buyers who want executive polish without showing off.

details
A185651_overfull @ Audi AG
A185640_overfull @ Audi AG
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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.

details
21C0295_008 @ Mercedes-Benz Group Media
21C0295_012 @ Mercedes-Benz Group Media
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21C0297_041 @ Mercedes-Benz Group Media
21C0297_069 @ Mercedes-Benz Group Media

Reviews Audi A6 Limousine

Reviews Mercedes C-Class Sedan

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Audi A6 Limousine
Mercedes C-Class Sedan
A6 Limousine @ Audi AG
C-Class Sedan @ Mercedes-Benz Group Media

Costs and Consumption
Price
47600 - 68100 £
Price
41200 - 103100 £
Consumption L/100km
2.2 - 6.9 L
Consumption L/100km
1.6 - 9 L
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
97 - 105 km
Electric Range
11 - 117 km
Battery Capacity
20.70 kWh
Battery Capacity
19.50 kWh
co2
49 - 157 g/km
co2
41 - 205 g/km
Fuel tank capacity
46 - 60 L
Fuel tank capacity
40 - 66 L

Dimensions and Body
Body Type
Sedan
Body Type
Sedan
Seats
5
Seats
5
Doors
4
Doors
4
Curb weight
1845 - 2220 kg
Curb weight
1695 - 2195 kg
Trunk capacity
354 - 492 L
Trunk capacity
280 - 455 L
Length
4999 mm
Length
4751 - 4842 mm
Width
1875 mm
Width
1820 - 1900 mm
Height
1452 mm
Height
1438 - 1458 mm
Max trunk capacity
-
Max trunk capacity
-
Payload
535 - 625 kg
Payload
480 - 570 kg

Engine and Performance
Engine Type
Petrol, Diesel MHEV, Petrol 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
183 - 680 HP
Acceleration 0-100km/h
4.7 - 8.2 s
Acceleration 0-100km/h
3.4 - 8.6 s
Max Speed
243 - 250 km/h
Max Speed
230 - 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
135 - 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, B, D, G
Brand
Audi
Brand
Mercedes-Benz

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What drive types are available for the Audi A6 Limousine?

Available configurations include 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.