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Audi Q7 vs Mercedes B Class comparison

Compare performance (507 HP vs 238 HP), boot space and price (70,600 £ vs 33,100 £ ) at a glance. Find out which car is the better choice for you – Audi Q7 or Mercedes B Class?

Audi Q7 vs Mercedes B Class: Key differences

Audi Q7

4.5 (2 Reviews)
rate
  • significantly more power
  • markedly more efficient
  • significantly quicker 0–100 km/h
  • considerably more trunk space
details

Mercedes B Class

4.9 (5 Reviews)
rate
  • significantly cheaper
  • significantly 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

Q7

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 Q7 costs 70,600 £ . That’s a price difference of around 37,499 £.

Fuel consumption also shows a difference: the Audi Q7 uses 3.8 L/100km and is markedly more efficient than the Mercedes B Class with 5.1 L/100km. The difference is about 1.3 L/100km.

B 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 Audi Q7 offers significantly more power – delivering 507 HP compared to 238 HP. That’s roughly 269 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi Q7 is significantly quicker – completing the sprint in 4.1 s, while the Mercedes B Class takes 6.5 s. That’s about 2.4 s quicker.

There’s also a difference in torque: the Audi Q7 delivers substantially more torque with 770 Nm compared to 400 Nm. That’s about 370 Nm more.

Q7

Space and Everyday Use:

Cabin size, boot volume and payload all play a role in everyday practicality. Here, comfort and flexibility make the difference.

Seats: Audi Q7 offers more seats – 7 vs 5.

In terms of curb weight, Mercedes B Class is significantly lighter – 1,405 kg compared to 2,055 kg. The difference is around 650 kg.

Looking at boot space, the Audi Q7 offers considerably more boot space – 887 L compared to 455 L. That’s a difference of about 432 L.

When it comes to payload, the Audi Q7 carries clearly more – 885 kg compared to 550 kg. That’s a difference of about 335 kg.

Who wins the race in the data check?

The Audi Q7 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 £70,600
Q7

Audi Q7

  • Engine Type : Petrol MHEV, Diesel MHEV, Petrol, Plugin Hybrid
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive
  • Power HP : 231 - 507 HP
  • Consumption L/100km : 3.8 - 11.9 L/100km
  • Electric Range : 81 - 82 km
details

Frequently compared as well

Mercedes A Class
Mercedes B Class
VS
The Mercedes A‑Class is the sporty, tech‑savvy compact that thrills with sharp handling and a slick cockpit, while the Mercedes B‑Class trades a bit of attitude for towering practicality, roomier seats and a more useful boot. Choose the A‑Class if you want driving fun and style; pick the B‑Class if …
Mercedes B Class
Mercedes GLA
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The Mercedes B‑Class is the practical, airy people‑carrier that prioritises space and comfort, while the Mercedes GLA takes the same mechanical smarts and adds SUV looks, higher ride height and a touch more road presence. Pick the B‑Class for family‑friendly sense and efficiency, choose the GLA if …
Audi Q7
Mercedes B Class

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi Q7

The Audi Q7 cuts an imposing figure on the road, balancing restrained luxury with a spacious, tech-rich cabin that makes long journeys feel effortless. It rides with confident composure and polished manners, so if you want a premium family SUV that feels grown-up and worth the badge, the Q7 is a persuasive choice — even the in-laws will be impressed.

details
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Reviews Audi Q7

4.5 (2 Reviews)
rate
A.B.
24 Mar 2026, 11:45:19

Constant faults with the touch door opening, the trunk, sign-reading and the front obstacle sensors. The service repaired it under warranty five times — they replaced wiring harnesses, a sensor, uploaded software — and then gave up. They told me they don’t know what else to do. That’s the customer care at a German premium brand. A car worth over 400,000 and they tell the customer they don’t know what to do. I paid the final installment and I’m giving the car back to them. I’m taking a Chinese BYD Seal U DM-i plug-in hybrid with better equipment for 165k after a discount from 225k. With that attitude to customers and those high prices, the Germans will have fewer and fewer people interested in their cars — but they’ve only got themselves to blame!!!

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

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.

details
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Reviews Mercedes B Class

4.9 (5 Reviews)
rate
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 Q7
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In a head-to-head comparison, the Audi Q7 and the Mazda CX-80 offer distinct experiences tailored for different types of drivers. The Audi Q7 exudes luxury with its high-end interior, advanced tech features, and robust performance, making it an excellent choice for those seeking a premium driving …
Audi Q7
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Audi Q2
Mercedes B Class
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Audi Q7
Mercedes B Class

Costs and Consumption
Price
70,600 - 100,600 £
Price
33,100 - 52,500 £
Consumption L/100km
3.8 - 11.9 L/100km
Consumption L/100km
5.1 - 6.9 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
81 - 82 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
86 - 271 g/km
co2
133 - 156 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
MPV
Seats
5 - 7
Seats
5
Doors
-
Doors
-
Curb weight
2,055 - 2,460 kg
Curb weight
1,405 - 1,565 kg
Trunk capacity
563 - 887 L
Trunk capacity
445 - 455 L
Length
-
Length
-
Width
1,970 mm
Width
1,796 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
640 - 885 kg
Payload
515 - 550 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel MHEV, Petrol, Plugin Hybrid
Engine Type
Petrol MHEV, Diesel
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
All-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
231 - 507 HP
Power HP
116 - 238 HP
Acceleration 0-100km/h
4.1 - 7.1 s
Acceleration 0-100km/h
6.5 - 10 s
Max Speed
-
Max Speed
-
Torque
500 - 770 Nm
Torque
200 - 400 Nm
Number of Cylinders
6 - 8
Number of Cylinders
4
Power kW
170 - 373 kW
Power kW
85 - 175 kW
Engine capacity
2,967 - 3,996 cm3
Engine capacity
1,332 - 1,991 cm3

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
G, B
CO2 Efficiency Class
D, E, F
Brand
Audi
Brand
Mercedes-Benz
Is the Audi Q7 offered with different drivetrains?

The Audi Q7 is available as 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.