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BMW i7 vs Mercedes B Class comparison

Compare performance (659 HP vs 238 HP), boot space and price (99,300 £ vs 33,100 £ ) at a glance. Find out which car is the better choice for you – BMW i7 or Mercedes B Class?

BMW i7 vs Mercedes B Class: Key differences

BMW i7

  • clearly more power
  • significantly quicker 0–100 km/h
  • marginally more trunk space
details

Mercedes B Class

4.9 (5 Reviews)
rate
  • significantly cheaper
  • considerably 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

i7

Costs and Efficiency:

Price and efficiency are key factors when choosing a car – and this is often where the real differences emerge.

Mercedes B Class is significantly cheaper – starting at 33,100 £ , while the BMW i7 costs 99,300 £ . That’s a price difference of around 66,213 £.

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 BMW i7 offers clearly more power – delivering 659 HP compared to 238 HP. That’s roughly 421 HP more horsepower.

When accelerating from 0 to 100 km/h, the BMW i7 is significantly quicker – completing the sprint in 3.7 s, while the Mercedes B Class takes 6.5 s. That’s about 2.8 s quicker.

There’s also a difference in torque: the BMW i7 delivers considerably more torque with 1,100 Nm compared to 400 Nm. That’s about 700 Nm more.

i7

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, Mercedes B Class is considerably lighter – 1,405 kg compared to 2,595 kg. The difference is around 1,190 kg.

Looking at boot space, the BMW i7 offers marginally more boot space – 500 L compared to 455 L. That’s a difference of about 45 L.

When it comes to payload, the Mercedes B Class carries only slightly more – 550 kg compared to 535 kg. That’s a difference of about 15 kg.

Who wins the race in the data check?

The BMW i7 is far ahead 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 £99,300
i7

BMW i7

  • Engine Type : Electric
  • Transmission : Automatic
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 455 - 659 HP
  • Consumption kWh/100km : 18.5 - 20.8 kWh/100km
  • Electric Range : 559 - 624 km
details

Frequently compared as well

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Mercedes B Class
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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 …
BMW i7
Mercedes B Class

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

BMW i7

The BMW i7 is a quietly imposing electric limousine that wraps advanced tech and traditional Bavarian comfort in a futuristic skin. For buyers after serene luxury with a mischievous streak, it pampers rear-seat occupants while reminding the driver that BMW still knows how to make a big car feel alive.

details
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Reviews BMW i7

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 (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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BMW i7
Mercedes B Class

Costs and Consumption
Price
99,300 - 157,200 £
Price
33,100 - 52,500 £
Consumption L/100km
-
Consumption L/100km
5.1 - 6.9 L/100km
Consumption kWh/100km
18.5 - 20.8 kWh/100km
Consumption kWh/100km
-
Electric Range
559 - 624 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
0 g/km
co2
133 - 156 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Sedan
Body Type
MPV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
2,595 - 2,770 kg
Curb weight
1,405 - 1,565 kg
Trunk capacity
500 L
Trunk capacity
445 - 455 L
Length
-
Length
-
Width
1,950 mm
Width
1,796 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
480 - 535 kg
Payload
515 - 550 kg

Engine and Performance
Engine Type
Electric
Engine Type
Petrol MHEV, Diesel
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Reduction Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
455 - 659 HP
Power HP
116 - 238 HP
Acceleration 0-100km/h
3.7 - 5.5 s
Acceleration 0-100km/h
6.5 - 10 s
Max Speed
-
Max Speed
-
Torque
650 - 1,100 Nm
Torque
200 - 400 Nm
Number of Cylinders
-
Number of Cylinders
4
Power kW
335 - 485 kW
Power kW
85 - 175 kW
Engine capacity
-
Engine capacity
1,332 - 1,991 cm3

General
Model Year
2,022 - 2,023
Model Year
2025
CO2 Efficiency Class
A
CO2 Efficiency Class
D, E, F
Brand
BMW
Brand
Mercedes-Benz
Is the BMW i7 offered with different drivetrains?

The BMW i7 is offered with Rear-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.