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Audi A7 vs Mercedes B Class comparison

Compare performance (630 HP vs 238 HP), boot space and price (55,000 £ vs 33,100 £ ) at a glance. Find out which car is the better choice for you – Audi A7 or Mercedes B Class?

Audi A7 vs Mercedes B Class: Key differences

Audi A7

  • considerably more power
  • considerably more efficient
  • significantly quicker 0–100 km/h
  • a bit more trunk space
details

Mercedes B Class

4.9 (6 Reviews)
rate
  • significantly cheaper
  • noticeably lighter
details

All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.

By Achim Sedelmaier

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

A7

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 B Class is significantly cheaper – starting at 33,100 £ , while the Audi A7 costs 55,000 £ . That’s a price difference of around 21,899 £.

Fuel consumption also shows a difference: the Audi A7 uses 1.2 L/100km and is considerably more efficient than the Mercedes B Class with 5.1 L/100km. The difference is about 3.9 L/100km.

B Class

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 Audi A7 offers considerably more power – delivering 630 HP compared to 238 HP. That’s roughly 392 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A7 is significantly quicker – completing the sprint in 3.4 s, while the Mercedes B Class takes 6.5 s. That’s about 3.1 s quicker.

There’s also a difference in torque: the Audi A7 delivers substantially more torque with 850 Nm compared to 400 Nm. That’s about 450 Nm more.

A7

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.

Seats: Mercedes B Class offers more seats – 5 vs 4.

In terms of curb weight, Mercedes B Class is noticeably lighter – 1,405 kg compared to 1,770 kg. The difference is around 365 kg.

Looking at boot space, the Audi A7 offers a bit more boot space – 535 L compared to 455 L. That’s a difference of about 80 L.

When it comes to payload, the Audi A7 carries very slightly more – 600 kg compared to 550 kg. That’s a difference of about 50 kg.

Who wins the race in the data check?

The Audi A7 stands well ahead of its rival 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 £55,000
A7

Audi A7

  • Engine Type Diesel MHEV, Petrol MHEV, Plugin Hybrid
  • Transmission Automatic
  • Drive Type All-Wheel Drive, Front-Wheel Drive
  • Power HP 204 - 630 HP
  • Consumption L/100km 1.2 - 12.2 L/100km
  • Electric Range 67 - 68 km
details

Frequently compared as well

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Audi A7
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi A7

The Audi A7 wraps elegant fastback lines around a sumptuous, tech-packed cabin that turns everyday drives into something a bit more special. It strikes a polished balance between relaxed comfort and engaging poise, so you’ll enjoy long cruises and spirited backroad runs while arriving in unmistakable style.

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Reviews Audi A7

No reviews yet. Share your experience and help others decide.

Mercedes B Class

The Mercedes B-Class is a smart, grown-up compact people carrier that dresses everyday practicality in a near‑premium polish, perfect for buyers who want comfort and a classy badge without the theatrics. It won’t set your pulse racing on a back road, but it will make school runs, commutes and grocery hauls feel pleasantly civilized — a reliable, slightly posh companion for real life.

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Reviews Mercedes B Class

4.9 (6 Reviews)
rate
SiBa
31 Jul 2026, 14:51:34

We've been driving only the B180D automatic for 9 years — there's nothing better. Great on long trips; the next one will be another B180D automatic.

How do you mainly use this car? (optional): Family car
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Safety
Practicality / Trunk & Everyday Use
Value for Money
Peter
5 Mar 2026, 05:51:19

My wife and I have been driving a Mercedes W247 200d for seven years now, with 93,000 km on the clock. The car is very comfortable even on long trips and economical. At the last service the pads of the electric parking brake were replaced; otherwise no repairs. We love this car.

How do you mainly use this car? (optional): Family car
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

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Audi A7
Mercedes B Class

Costs and Consumption
Price
55,000 - 117,900 £
Price
33,100 - 52,500 £
Consumption L/100km
1.2 - 12.2 L/100km
Consumption L/100km
5.1 - 6.9 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
67 - 68 km
Electric Range
-
Battery Capacity
14.4 kWh
Battery Capacity
-
co2
28 - 276 g/km
co2
133 - 156 g/km
Fuel tank capacity
52 - 73 L
Fuel tank capacity
-

Dimensions and Body
Body Type
Hatchback
Body Type
MPV
Seats
4
Seats
5
Doors
5
Doors
-
Curb weight
1,770 - 2,150 kg
Curb weight
1,405 - 1,565 kg
Trunk capacity
380 - 535 L
Trunk capacity
445 - 455 L
Length
4,969 - 5,009 mm
Length
-
Width
1,908 - 1,950 mm
Width
1,796 mm
Height
1,422 - 1,424 mm
Height
-
Max trunk capacity
1,235 - 1,390 L
Max trunk capacity
-
Payload
510 - 600 kg
Payload
515 - 550 kg

Engine and Performance
Engine Type
Diesel MHEV, Petrol MHEV, Plugin Hybrid
Engine Type
Petrol MHEV, Diesel
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic, Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
All-Wheel Drive, Front-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
204 - 630 HP
Power HP
116 - 238 HP
Acceleration 0-100km/h
3.4 - 8.1 s
Acceleration 0-100km/h
6.5 - 10 s
Max Speed
245 - 280 km/h
Max Speed
-
Torque
370 - 850 Nm
Torque
200 - 400 Nm
Number of Cylinders
4 - 8
Number of Cylinders
4
Power kW
150 - 463 kW
Power kW
85 - 175 kW
Engine capacity
1,968 - 3,996 cm3
Engine capacity
1,332 - 1,991 cm3

General
Model Year
2,023 - 2,024
Model Year
2025
CO2 Efficiency Class
E, F, B, G
CO2 Efficiency Class
D, E, F
Brand
Audi
Brand
Mercedes-Benz
Is the Audi A7 offered with different drivetrains?

Available configurations include All-Wheel Drive or Front-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.