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Mercedes B Class vs smart #3 comparison
Compare performance (238 HP vs 428 HP), boot space and price (33,100 £ vs 34,700 £ ) at a glance. Find out which car is the better choice for you – Mercedes B Class or smart #3?
B Class
Costs and Efficiency:
When it comes to price and running costs, the biggest differences usually appear. This is often where you see which car fits your budget better in the long run.
Mercedes B Class is marginally cheaper – starting at 33,100 £ , while the smart #3 costs 34,700 £ . That’s a price difference of around 1,576 £.
As for electric range, the smart #3 offers substantially more range – reaching up to 455 km, about 372 km more than the Mercedes B Class.
#3
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 smart #3 offers substantially more power – delivering 428 HP compared to 238 HP. That’s roughly 190 HP more horsepower.
When accelerating from 0 to 100 km/h, the smart #3 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.
Looking at top speed, the Mercedes B Class is a bit faster – reaching 223 km/h, while the smart #3 tops out at 180 km/h. The difference is around 43 km/h.
There’s also a difference in torque: the smart #3 delivers clearly more torque with 584 Nm compared to 450 Nm. That’s about 134 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 clearly lighter – 1,405 kg compared to 1,780 kg. The difference is around 375 kg.
Looking at boot space, the Mercedes B Class offers moderately more boot space – 455 L compared to 370 L. That’s a difference of about 85 L.
For maximum load capacity, the Mercedes B Class offers a bit more capacity – up to 1,440 L, about 280 L more than the smart #3.
When it comes to payload, the Mercedes B Class carries somewhat more – 550 kg compared to 450 kg. That’s a difference of about 100 kg.
Who wins the race in the data check?
The smart #3 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 £34,700
smart #3
Mercedes B Class
smart #3
Costs and Consumption
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Engine and Performance
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Dimensions and Body
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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
smart #3
The Smart #3 turns the brand's cheeky city-car attitude into a grown-up compact SUV, pairing sleek styling with a surprisingly roomy, well-made interior. It's a brilliant pick for buyers who want electric ease without dullness — practical enough for daily life, but still lively enough to make parking and grocery runs feel a little fun.
details
Mercedes B Class
smart #3
Costs and Consumption |
|
|---|---|
|
Price
33,100 - 52,500 £
|
Price
34,700 - 45,800 £
|
|
Consumption L/100km
2.5 - 6.9 L/100km
|
Consumption L/100km
-
|
|
Consumption kWh/100km
-
|
Consumption kWh/100km
16.3 - 17.6 kWh/100km
|
|
Electric Range
83 km
|
Electric Range
325 - 455 km
|
|
Battery Capacity
12.9 kWh
|
Battery Capacity
47 - 62 kWh
|
|
co2
56 - 156 g/km
|
co2
0 g/km
|
|
Fuel tank capacity
35 L
|
Fuel tank capacity
-
|
Dimensions and Body |
|
|---|---|
|
Body Type
MPV
|
Body Type
SUV
|
|
Seats
5
|
Seats
5
|
|
Doors
5
|
Doors
5
|
|
Curb weight
1,405 - 1,745 kg
|
Curb weight
1,780 - 1,910 kg
|
|
Trunk capacity
405 - 455 L
|
Trunk capacity
370 L
|
|
Length
4,419 mm
|
Length
4,400 mm
|
|
Width
1,796 mm
|
Width
1,844 mm
|
|
Height
1,562 mm
|
Height
1,556 mm
|
|
Max trunk capacity
1,440 L
|
Max trunk capacity
1,160 L
|
|
Payload
505 - 550 kg
|
Payload
419 - 450 kg
|
Engine and Performance |
|
|---|---|
|
Engine Type
Plugin Hybrid, Petrol MHEV, Diesel
|
Engine Type
Electric
|
|
Transmission
Automatic
|
Transmission
Automatic
|
|
Transmission Detail
Dual-Clutch Automatic
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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
272 - 428 HP
|
|
Acceleration 0-100km/h
6.5 - 10 s
|
Acceleration 0-100km/h
3.7 - 5.8 s
|
|
Max Speed
223 km/h
|
Max Speed
180 km/h
|
|
Torque
200 - 450 Nm
|
Torque
343 - 584 Nm
|
|
Number of Cylinders
4
|
Number of Cylinders
-
|
|
Power kW
85 - 175 kW
|
Power kW
200 - 315 kW
|
|
Engine capacity
1,332 - 1,991 cm3
|
Engine capacity
-
|
General |
|
|---|---|
|
Model Year
2,024 - 2,025
|
Model Year
2,023 - 2,025
|
|
CO2 Efficiency Class
B, D, E, F
|
CO2 Efficiency Class
A
|
|
Brand
Mercedes-Benz
|
Brand
smart
|
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.