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BYD Dolphin vs Mercedes B Class comparison

Compare performance (204 HP vs 238 HP), boot space and price (29,700 £ vs 33,100 £ ) at a glance. Find out which car is the better choice for you – BYD Dolphin or Mercedes B Class?

BYD Dolphin vs Mercedes B Class: Key differences

BYD Dolphin

4 (4 Reviews)
rate
  • somewhat cheaper
details

Mercedes B Class

4.9 (5 Reviews)
rate
  • moderately more power
  • very slightly quicker 0–100 km/h
  • somewhat lighter
  • markedly 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

Dolphin

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.

BYD Dolphin is somewhat cheaper – starting at 29,700 £ , while the Mercedes B Class costs 33,100 £ . That’s a price difference of around 3,438 £.

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 Mercedes B Class offers moderately more power – delivering 238 HP compared to 204 HP. That’s roughly 34 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes B Class is very slightly quicker – completing the sprint in 6.5 s, while the BYD Dolphin takes 7 s. That’s about 0.5 s quicker.

There’s also a difference in torque: the Mercedes B Class delivers noticeably more torque with 400 Nm compared to 310 Nm. That’s about 90 Nm more.

Dolphin

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 somewhat lighter – 1,405 kg compared to 1,658 kg. The difference is around 253 kg.

Looking at boot space, the Mercedes B Class offers markedly more boot space – 455 L compared to 345 L. That’s a difference of about 110 L.

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

Who wins the race in the data check?

The Mercedes B Class has only a minor advantage 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 £33,100
B Class

Mercedes B Class

  • Engine Type Petrol MHEV, Diesel
  • Transmission Automatic
  • Drive Type Front-Wheel Drive, All-Wheel Drive
  • Power HP 116 - 238 HP
  • Consumption L/100km 5.1 - 6.9 L/100km
details

Frequently compared as well

BYD Dolphin
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The BYD Dolphin and BYD Atto 2 represent two distinct EV choices from BYD: the Dolphin is a compact, city-oriented hatchback focused on efficiency and nimble urban driving, while the Atto 2 is a compact crossover offering more space, a higher driving position and richer tech. Choose the Dolphin for …
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Mercedes B Class

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

BYD Dolphin

The BYD Dolphin is a cheeky electric hatchback that blends playful styling with surprising practicality, making it a brilliant city companion for buyers who want modern tech without the showroom bravado. It’s comfy, efficient and easy to live with, and while it won’t blind you with supercar drama, it will quietly get the job done with plenty of character.

details
E3343F48-6402-43F6-BA2F-1FB1F8EFCE7F
000AECC3-AF0F-42E4-A606-040E7FB88B81
0344F0B7-DD22-4EE0-9220-311A496628F6

Reviews BYD Dolphin

4 (4 Reviews)
rate
Mark Kennedy
12 Apr 2026, 17:25:08

Absolute gem of a car, wonderfully smooth and powerful, along with being loaded with tech. By far the best car I've had. Would highly recommend

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
John Maskell
3 Jan 2026, 07:26:24

Loving the dolphin

How do you mainly use this car? (optional): City / Short distance
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
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

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If you want no-nonsense electric practicality and impressive value for daily miles, the BYD Dolphin delivers usable range, clever packaging and tech that actually matters without breaking the bank. The Renault 5, meanwhile, sacrifices a little practicality for irresistible retro charm and …
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BYD Dolphin
Mercedes B Class

Costs and Consumption
Price
29,700 - 31,400 £
Price
33,100 - 52,500 £
Consumption L/100km
-
Consumption L/100km
5.1 - 6.9 L/100km
Consumption kWh/100km
15.9 kWh/100km
Consumption kWh/100km
-
Electric Range
427 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
Hatchback
Body Type
MPV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,658 kg
Curb weight
1,405 - 1,565 kg
Trunk capacity
345 L
Trunk capacity
445 - 455 L
Length
-
Length
-
Width
1,770 mm
Width
1,796 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
410 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
Front-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
204 HP
Power HP
116 - 238 HP
Acceleration 0-100km/h
7 s
Acceleration 0-100km/h
6.5 - 10 s
Max Speed
-
Max Speed
-
Torque
310 Nm
Torque
200 - 400 Nm
Number of Cylinders
-
Number of Cylinders
4
Power kW
150 kW
Power kW
85 - 175 kW
Engine capacity
-
Engine capacity
1,332 - 1,991 cm3

General
Model Year
2023
Model Year
2025
CO2 Efficiency Class
A
CO2 Efficiency Class
D, E, F
Brand
BYD
Brand
Mercedes-Benz
What drive types are available for the BYD Dolphin?

The BYD Dolphin is available as 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.