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Audi A6 Limousine vs Mercedes C-Class Saloon comparison

Compare performance (367 HP vs 680 HP), boot space and price (47,600 £ vs 41,300 £ ) at a glance. Find out which car is the better choice for you – Audi A6 Limousine or Mercedes C-Class Saloon?

Audi A6 Limousine vs Mercedes C-Class Saloon: Key differences

Audi A6 Limousine

  • clearly more efficient
  • considerably more electric range
  • very slightly more trunk space
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Mercedes C-Class Saloon

  • moderately cheaper
  • significantly more power
  • visibly quicker 0–100 km/h
  • barely lighter
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Here’s where it gets real: The technical differences in detail

A6 Limousine

Costs and Efficiency:

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

Mercedes C-Class Saloon is moderately cheaper – starting at 41,300 £ , while the Audi A6 Limousine costs 47,600 £ . That’s a price difference of around 6,246 £.

Fuel consumption also shows a difference: the Audi A6 Limousine uses 2.2 L/100km and is clearly more efficient than the Mercedes C-Class Saloon with 4.5 L/100km. The difference is about 2.3 L/100km.

As for electric range, the Audi A6 Limousine offers considerably more range – reaching up to 105 km, about 94 km more than the Mercedes C-Class Saloon.

C-Class Saloon

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 Saloon offers significantly more power – delivering 680 HP compared to 367 HP. That’s roughly 313 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes C-Class Saloon is visibly quicker – completing the sprint in 3.4 s, while the Audi A6 Limousine takes 4.7 s. That’s about 1.3 s quicker.

There’s also a difference in torque: the Mercedes C-Class Saloon delivers substantially more torque with 1,020 Nm compared to 580 Nm. That’s about 440 Nm more.

A6 Limousine

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 Saloon is barely lighter – 1,695 kg compared to 1,845 kg. The difference is around 150 kg.

Looking at boot space, the Audi A6 Limousine offers very slightly more boot space – 492 L compared to 455 L. That’s a difference of about 37 L.

When it comes to payload, the Audi A6 Limousine carries only slightly more – 625 kg compared to 570 kg. That’s a difference of about 55 kg.

Who wins the race in the data check?

The Audi A6 Limousine 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 £47,600
A6 Limousine

Audi A6 Limousine

  • Engine Type Petrol, Diesel MHEV, Petrol MHEV, Plugin Hybrid
  • Transmission Automatic
  • Drive Type Front-Wheel Drive, All-Wheel Drive
  • Power HP 204 - 367 HP
  • Consumption L/100km 2.2 - 7.3 L/100km
  • Electric Range 97 - 105 km
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View detailed analysis

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View detailed analysis

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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.

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Mercedes C-Class Saloon

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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Audi A6 Limousine
Mercedes C-Class Saloon

Costs and Consumption
Price
47,600 - 68,100 £
Price
41,300 - 103,400 £
Consumption L/100km
2.2 - 7.3 L/100km
Consumption L/100km
4.5 - 9 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
97 - 105 km
Electric Range
11 km
Battery Capacity
-
Battery Capacity
-
co2
49 - 166 g/km
co2
119 - 205 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Sedan
Body Type
Sedan
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,845 - 2,220 kg
Curb weight
1,695 - 2,165 kg
Trunk capacity
354 - 492 L
Trunk capacity
280 - 455 L
Length
-
Length
-
Width
1,875 mm
Width
1,820 - 1,900 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
535 - 625 kg
Payload
485 - 570 kg

Engine and Performance
Engine Type
Petrol, Diesel MHEV, Petrol MHEV, Plugin Hybrid
Engine Type
Petrol MHEV, Diesel MHEV, Plugin Hybrid
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
-
Max Speed
-
Torque
340 - 580 Nm
Torque
250 - 1,020 Nm
Number of Cylinders
4 - 6
Number of Cylinders
4
Power kW
150 - 270 kW
Power kW
135 - 500 kW
Engine capacity
1,968 - 2,995 cm3
Engine capacity
1,496 - 1,999 cm3

General
Model Year
2025
Model Year
2,024 - 2,025
CO2 Efficiency Class
F, D, E, B
CO2 Efficiency Class
E, D, G
Brand
Audi
Brand
Mercedes-Benz
What drivetrain options does the Audi A6 Limousine have?

Available configurations include Front-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.