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Mercedes B Class vs SEAT Leon comparison

Compare performance (238 HP vs 272 HP), boot space and price (33,100 £ vs 24,800 £ ) at a glance. Find out which car is the better choice for you – Mercedes B Class or SEAT Leon?

Mercedes B Class vs SEAT Leon: Key differences

Mercedes B Class

4.9 (5 Reviews)
rate
  • slightly quicker 0–100 km/h
  • moderately more trunk space
details

SEAT Leon

4.4 (2 Reviews)
rate
  • clearly cheaper
  • moderately more power
  • substantially more efficient
  • marginally 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

B Class

Costs and Efficiency:

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

SEAT Leon is clearly cheaper – starting at 24,800 £ , while the Mercedes B Class costs 33,100 £ . That’s a price difference of around 8,324 £.

Fuel consumption also shows a difference: the SEAT Leon uses 1.2 L/100km and is substantially more efficient than the Mercedes B Class with 5.1 L/100km. The difference is about 3.9 L/100km.

Leon

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 SEAT Leon offers moderately more power – delivering 272 HP compared to 238 HP. That’s roughly 34 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes B Class is slightly quicker – completing the sprint in 6.5 s, while the SEAT Leon takes 7.7 s. That’s about 1.2 s quicker.

There’s also a difference in torque: the Mercedes B Class delivers only slightly more torque with 400 Nm compared to 360 Nm. That’s about 40 Nm more.

B Class

Space and Everyday Use:

Whether family car or daily driver – which one offers more room, flexibility and comfort?

Both vehicles offer seating for 5 people.

In terms of curb weight, SEAT Leon is marginally lighter – 1,344 kg compared to 1,405 kg. The difference is around 61 kg.

Looking at boot space, the Mercedes B Class offers moderately more boot space – 455 L compared to 380 L. That’s a difference of about 75 L.

When it comes to payload, the Mercedes B Class carries marginally more – 550 kg compared to 521 kg. That’s a difference of about 29 kg.

Who wins the race in the data check?

The SEAT Leon 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 £24,800
Leon

SEAT Leon

  • Engine Type : Petrol, Petrol MHEV, Plugin Hybrid, Diesel
  • Transmission : Manuel, Automatic
  • Drive Type : Front-Wheel Drive
  • Power HP : 116 - 272 HP
  • Consumption L/100km : 1.2 - 5.5 L/100km
  • Electric Range : 133 km
details

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Mercedes B Class
SEAT Leon

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
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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

SEAT Leon

SEAT Leon pairs sharp, modern styling with a cabin that's sensible and slightly sporty, making it an appealing choice for buyers who want flair without fuss. It drives with eager composure and offers a neat balance of comfort and agility, so you get everyday usability with a wink of fun.

details
Small-33980-LeonSEDynamic-MysteryBlue
Small-33989-LeonSEDynamic-MysteryBlue
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Small-35510-SEATLeonkeepsWhatCarAwardinthefamily

Reviews SEAT Leon

4.4 (2 Reviews)
rate
FaBio
4 Jan 2026, 21:30:20

Mechanically the car is fairly well built, apart from the rear axle.
The air conditioning is effective and visibility is good, while the FR setup paired with the 18" wheels, in my view, hurts comfort — getting in and out can be awkward. Once on board, though, the seats are very comfortable. The infotainment is comprehensive, with a generously sized screen and full-link smartphone connectivity; the factory sat-nav does what it can, but obviously Maps is superior in every way.
All in all, a fun/sporty car that also winks at family life thanks to a roomy boot and modest fuel consumption.

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

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Mercedes B Class
SEAT Leon

Costs and Consumption
Price
33,100 - 52,500 £
Price
24,800 - 36,800 £
Consumption L/100km
5.1 - 6.9 L/100km
Consumption L/100km
1.2 - 5.5 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
133 km
Battery Capacity
-
Battery Capacity
-
co2
133 - 156 g/km
co2
28 - 126 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
MPV
Body Type
Hatchback
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,405 - 1,565 kg
Curb weight
1,344 - 1,657 kg
Trunk capacity
445 - 455 L
Trunk capacity
270 - 380 L
Length
-
Length
-
Width
1,796 mm
Width
1,799 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
515 - 550 kg
Payload
473 - 521 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel
Engine Type
Petrol, Petrol MHEV, Plugin Hybrid, Diesel
Transmission
Automatic
Transmission
Manuel, Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Front-Wheel Drive
Power HP
116 - 238 HP
Power HP
116 - 272 HP
Acceleration 0-100km/h
6.5 - 10 s
Acceleration 0-100km/h
7.7 - 10.5 s
Max Speed
-
Max Speed
-
Torque
200 - 400 Nm
Torque
220 - 360 Nm
Number of Cylinders
4
Number of Cylinders
4
Power kW
85 - 175 kW
Power kW
85 - 200 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
1,498 - 1,968 cm3

General
Model Year
2025
Model Year
2,024 - 2,026
CO2 Efficiency Class
D, E, F
CO2 Efficiency Class
D, B
Brand
Mercedes-Benz
Brand
SEAT
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.