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Audi A6 Limousine vs Mercedes S-Class comparison

Compare performance (367 HP vs 635 HP), boot space and price (47,600 £ vs 104,000 £ ) at a glance. Find out which car is the better choice for you – Audi A6 Limousine or Mercedes S-Class?

Audi A6 Limousine vs Mercedes S-Class: Key differences

Audi A6 Limousine

  • considerably cheaper
  • moderately lighter
details

Mercedes S-Class

  • considerably more power
  • somewhat more electric range
  • somewhat quicker 0–100 km/h
  • marginally more trunk space
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By Achim Sedelmaier

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

A6 Limousine

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.

Audi A6 Limousine is considerably cheaper – starting at 47,600 £ , while the Mercedes S-Class costs 104,000 £ . That’s a price difference of around 56,448 £.

Both cars consume an average of 2.2 L/100km – no difference here.

As for electric range, the Mercedes S-Class offers somewhat more range – reaching up to 118 km, about 13 km more than the Audi A6 Limousine.

S-Class

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 S-Class offers considerably more power – delivering 635 HP compared to 367 HP. That’s roughly 268 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes S-Class is somewhat quicker – completing the sprint in 4 s, while the Audi A6 Limousine takes 4.7 s. That’s about 0.7 s quicker.

There’s also a difference in torque: the Mercedes S-Class delivers visibly more torque with 850 Nm compared to 580 Nm. That’s about 270 Nm more.

A6 Limousine

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, Audi A6 Limousine is moderately lighter – 1,845 kg compared to 2,165 kg. The difference is around 320 kg.

Looking at boot space, the Mercedes S-Class offers marginally more boot space – 530 L compared to 492 L. That’s a difference of about 38 L.

When it comes to payload, the Mercedes S-Class carries only slightly more – 660 kg compared to 625 kg. That’s a difference of about 35 kg.

Who wins the race in the data check?

The Mercedes S-Class 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 £104,000
S-Class

Mercedes S-Class

  • Engine Type Petrol MHEV, Plugin Hybrid, Diesel MHEV
  • Transmission Automatic
  • Drive Type All-Wheel Drive, Rear-Wheel Drive
  • Power HP 336 - 635 HP
  • Consumption L/100km 2.2 - 11 L/100km
  • Electric Range 98 - 118 km
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Audi A6 Limousine
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

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 S-Class

The Mercedes S-Class wraps peerless comfort, whisper-quiet luxury and subtle tech wizardry into a chauffeur-ready package that still knows how to engage the driver. It’s the car for buyers who want to arrive relaxed, be taken seriously and occasionally enjoy a grin when the road reminds them this limousine can dance.

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Mercedes S-Class

Costs and Consumption
Price
47,600 - 68,100 £
Price
104,000 - 201,400 £
Consumption L/100km
2.2 - 7.3 L/100km
Consumption L/100km
2.2 - 11 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
97 - 105 km
Electric Range
98 - 118 km
Battery Capacity
-
Battery Capacity
-
co2
49 - 166 g/km
co2
50 - 252 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
2,165 - 2,650 kg
Trunk capacity
354 - 492 L
Trunk capacity
345 - 530 L
Length
-
Length
-
Width
1,875 mm
Width
1,921 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
535 - 625 kg
Payload
420 - 660 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
All-Wheel Drive, Rear-Wheel Drive
Power HP
204 - 367 HP
Power HP
336 - 635 HP
Acceleration 0-100km/h
4.7 - 8.2 s
Acceleration 0-100km/h
4 - 5.7 s
Max Speed
-
Max Speed
-
Torque
340 - 580 Nm
Torque
560 - 850 Nm
Number of Cylinders
4 - 6
Number of Cylinders
6 - 8
Power kW
150 - 270 kW
Power kW
247 - 467 kW
Engine capacity
1,968 - 2,995 cm3
Engine capacity
2,989 - 3,982 cm3

General
Model Year
2025
Model Year
2026
CO2 Efficiency Class
F, D, E, B
CO2 Efficiency Class
G, B, F
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.