VS

Mercedes B Class vs BYD Sealion 7 comparison

Compare performance (238 HP vs 530 HP), boot space and price (33,100 £ vs 42,800 £ ) at a glance. Find out which car is the better choice for you – Mercedes B Class or BYD Sealion 7?

Mercedes B Class vs BYD Sealion 7: Key differences

Mercedes B Class

4.9 (5 Reviews)
rate
  • clearly cheaper
  • considerably lighter
details

BYD Sealion 7

4.8 (4 Reviews)
rate
  • clearly more power
  • clearly quicker 0–100 km/h
  • moderately more trunk space
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

B Class

Costs and Efficiency:

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

Mercedes B Class is clearly cheaper – starting at 33,100 £ , while the BYD Sealion 7 costs 42,800 £ . That’s a price difference of around 9,719 £.

Sealion 7

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 BYD Sealion 7 offers clearly more power – delivering 530 HP compared to 238 HP. That’s roughly 292 HP more horsepower.

When accelerating from 0 to 100 km/h, the BYD Sealion 7 is clearly quicker – completing the sprint in 4.5 s, while the Mercedes B Class takes 6.5 s. That’s about 2 s quicker.

There’s also a difference in torque: the BYD Sealion 7 delivers clearly more torque with 690 Nm compared to 400 Nm. That’s about 290 Nm more.

B Class

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 2,225 kg. The difference is around 820 kg.

Looking at boot space, the BYD Sealion 7 offers moderately more boot space – 520 L compared to 455 L. That’s a difference of about 65 L.

When it comes to payload, the Mercedes B Class carries noticeably more – 550 kg compared to 410 kg. That’s a difference of about 140 kg.

Who wins the race in the data check?

The BYD Sealion 7 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 £42,800
Sealion 7

BYD Sealion 7

  • Engine Type Electric
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive, All-Wheel Drive
  • Power HP 313 - 530 HP
  • Consumption kWh/100km 19.9 - 21.9 kWh/100km
  • Electric Range 456 - 502 km
details

Frequently compared as well

BYD Seal U
BYD Sealion 7
VS
Choosing between the Seal U and the Sealion 7 means weighing sportier driving dynamics against extra space and everyday practicality. This quick comparison highlights the key differences in performance, range, interior comfort and value so you can pick the BYD that best fits your needs.
BYD Sealion 7
Mazda CX-6e
VS
In one corner is the tech‑packed BYD Sealion 7, a gadget-rich challenger promising range and features for the money; in the other is the Mazda CX‑6e, Mazda’s sleeker, driver-focused answer with a more premium feel. We’ll pit them on comfort, performance, tech and running costs so you know which one …
Mercedes B Class
BYD Sealion 7

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

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
18C0947_011
18C0947_009
18C0953_005
18C0953_035
18C0947_044

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

BYD Sealion 7

The BYD Sealion 7 is a sleek electric wagon that blends sporty styling with surprising practicality, making it a compelling choice for drivers who want something different from the usual hatchback or SUV. Its refined interior and composed road manners give it an upscale feel, while clever packaging keeps it versatile for daily use.

details
img-0696
byd-sealion-7-17
byd-sealion-7-12

Reviews BYD Sealion 7

4.8 (4 Reviews)
rate
Rafael Serres Ferran
19 Jul 2026, 17:30:51

A much better vehicle than the 6. It beats it in practically every area. Faster, more room inside, better trunk, more comfortable

How do you mainly use this car? (optional): Commuter (short/medium distance)
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Steinbach
2 Jun 2026, 11:36:25

Fantastic car in every respect. Looks, interior, power, range, comfort, finish, etc.

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
oriol
27 Feb 2026, 15:33:27

range that I can always charge to 100% — unlike other brands that told me it was recommended to stop at 80%, which consequently cut my real range from 600 to 480 by not being able to charge to 100%. I think that's something people should know.

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

Frequently compared as well

Mercedes B Class
Mercedes GLA
VS
The Mercedes B‑Class and Mercedes GLA target buyers who want Mercedes practicality with premium touches, but they take different paths: the B‑Class is a spacious, hatchback-style people carrier while the GLA is a compact crossover with a higher ride height and sportier stance. This comparison looks …
BYD Sealion 7
MG MGS6 EV
VS
The BYD Sealion 7 and MG MGS6 EV are two electric contenders aimed at buyers who want strong range, practicality and good value. This comparison focuses on their driving range, charging, performance, interior comfort and running costs to help you decide which suits your everyday needs.
BYD Seal
BYD Sealion 7
VS
This comparison looks at the BYD Seal and the BYD Sealion 7 to help you decide which electric BYD best fits your needs. The Seal is a sleek, performance-oriented electric sedan, while the Sealion 7 focuses on greater practicality and interior flexibility for buyers who need more space.
BYD Tang
BYD Sealion 7
VS
The BYD Tang wears its SUV badge proudly — big, bold and businesslike, with a roomy cabin, high driving position and enough tech to turn family road trips into comfortable command missions. The BYD Sealion 7 is the sleeker, more carlike alternative, trading some bulk for sharper handling, better …
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 …
BMW 2 Series Active Tourer
Mercedes B Class
VS
The BMW 2 Series Active Tourer and the Mercedes B‑Class are the two leading compact MPVs for buyers who need practical space without the bulk of an SUV. The 2 Series Active Tourer leans toward a driver-focused, sharper feel, while the B‑Class prioritizes passenger comfort, flexible packaging and a …
Lexus RZ
BYD Sealion 7
VS
Comparing the Lexus RZ and the BYD Sealion 7 pits a premium, tech-forward luxury EV against an aggressively priced, feature-packed newcomer that challenges value and range expectations. I’ll walk you through the key differences in driving character, efficiency, interior quality and ownership costs …
XPeng G6
BYD Sealion 7
VS
The XPeng G6 and BYD Sealion 7 are two leading Chinese electric models that pair advanced technology and competitive range with distinct design and driving philosophies. This head‑to‑head compares range, performance, interior tech and ownership costs to help you choose the better fit for your needs.
Mercedes B Class
BYD Sealion 7

Costs and Consumption
Price
33,100 - 52,500 £
Price
42,800 - 52,300 £
Consumption L/100km
5.1 - 6.9 L/100km
Consumption L/100km
-
Consumption kWh/100km
-
Consumption kWh/100km
19.9 - 21.9 kWh/100km
Electric Range
-
Electric Range
456 - 502 km
Battery Capacity
-
Battery Capacity
-
co2
133 - 156 g/km
co2
0 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
MPV
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,405 - 1,565 kg
Curb weight
2,225 - 2,435 kg
Trunk capacity
445 - 455 L
Trunk capacity
520 L
Length
-
Length
-
Width
1,796 mm
Width
1,925 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
515 - 550 kg
Payload
410 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel
Engine Type
Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Reduction Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
116 - 238 HP
Power HP
313 - 530 HP
Acceleration 0-100km/h
6.5 - 10 s
Acceleration 0-100km/h
4.5 - 6.7 s
Max Speed
-
Max Speed
-
Torque
200 - 400 Nm
Torque
380 - 690 Nm
Number of Cylinders
4
Number of Cylinders
-
Power kW
85 - 175 kW
Power kW
230 - 390 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
-

General
Model Year
2025
Model Year
2024
CO2 Efficiency Class
D, E, F
CO2 Efficiency Class
A
Brand
Mercedes-Benz
Brand
BYD
What drivetrain options does the Mercedes B Class 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.