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Mercedes B Class vs Peugeot 508 SW comparison

Compare performance (238 HP vs 360 HP), boot space and price (33,100 £ vs 45,600 £ ) at a glance. Find out which car is the better choice for you – Mercedes B Class or Peugeot 508 SW?

Mercedes B Class vs Peugeot 508 SW: Key differences

Mercedes B Class

4.9 (5 Reviews)
rate
  • visibly cheaper
  • visibly lighter
details

Peugeot 508 SW

4.7 (1 Reviews)
rate
  • visibly more power
  • substantially more efficient
  • visibly quicker 0–100 km/h
  • somewhat 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 visibly cheaper – starting at 33,100 £ , while the Peugeot 508 SW costs 45,600 £ . That’s a price difference of around 12,471 £.

Fuel consumption also shows a difference: the Peugeot 508 SW uses 1.7 L/100km and is substantially more efficient than the Mercedes B Class with 5.1 L/100km. The difference is about 3.4 L/100km.

508 SW

Engine and Performance:

Under the bonnet, it becomes clear which model is tuned for sportiness and which one takes the lead when you hit the accelerator.

When it comes to engine power, the Peugeot 508 SW offers visibly more power – delivering 360 HP compared to 238 HP. That’s roughly 122 HP more horsepower.

When accelerating from 0 to 100 km/h, the Peugeot 508 SW is visibly quicker – completing the sprint in 5.2 s, while the Mercedes B Class takes 6.5 s. That’s about 1.3 s quicker.

There’s also a difference in torque: the Peugeot 508 SW delivers clearly more torque with 520 Nm compared to 400 Nm. That’s about 120 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 visibly lighter – 1,405 kg compared to 1,846 kg. The difference is around 441 kg.

Looking at boot space, the Peugeot 508 SW offers somewhat more boot space – 530 L compared to 455 L. That’s a difference of about 75 L.

When it comes to payload, the Mercedes B Class carries a bit more – 550 kg compared to 454 kg. That’s a difference of about 96 kg.

Who wins the race in the data check?

The Peugeot 508 SW 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 £45,600
508 SW

Peugeot 508 SW

  • Engine Type : Plugin Hybrid
  • Transmission : Automatic
  • Drive Type : Front-Wheel Drive, All-Wheel Drive
  • Power HP : 180 - 360 HP
  • Consumption L/100km : 1.7 - 2 L/100km
  • Electric Range : 46 - 52 km
details

Frequently compared as well

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Mercedes B Class
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Mercedes B Class
Peugeot 508 SW

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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18C0953_005
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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

Peugeot 508 SW

The Peugeot 508 SW dresses up as a sleek estate, blending Parisian flair with usable loadspace so you don't have to choose between style and weekend practicality. Inside it's a driver-focused cabin with quality materials and clever packaging that makes it a sensible, slightly mischievous choice for buyers who want an executive feel without the buttoned-up seriousness.

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PEUGEOT_508SW_1806PB_260
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Reviews Peugeot 508 SW

4.7 (1 Reviews)
rate

No reviews yet. Share your experience and help others decide.

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Costs and Consumption
Price
33,100 - 52,500 £
Price
45,600 - 61,800 £
Consumption L/100km
5.1 - 6.9 L/100km
Consumption L/100km
1.7 - 2 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
46 - 52 km
Battery Capacity
-
Battery Capacity
-
co2
133 - 156 g/km
co2
38 - 45 g/km
Fuel tank capacity
-
Fuel tank capacity
43 L

Dimensions and Body
Body Type
MPV
Body Type
Estate
Seats
5
Seats
5
Doors
-
Doors
5
Curb weight
1,405 - 1,565 kg
Curb weight
1,846 - 1,967 kg
Trunk capacity
445 - 455 L
Trunk capacity
530 L
Length
-
Length
4,778 mm
Width
1,796 mm
Width
1,859 mm
Height
-
Height
1,420 mm
Max trunk capacity
-
Max trunk capacity
1,780 L
Payload
515 - 550 kg
Payload
373 - 454 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel
Engine Type
Plugin Hybrid
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Automatic Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
116 - 238 HP
Power HP
180 - 360 HP
Acceleration 0-100km/h
6.5 - 10 s
Acceleration 0-100km/h
5.2 - 8.3 s
Max Speed
-
Max Speed
230 - 250 km/h
Torque
200 - 400 Nm
Torque
360 - 520 Nm
Number of Cylinders
4
Number of Cylinders
4
Power kW
85 - 175 kW
Power kW
133 - 265 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
1,598 cm3

General
Model Year
2025
Model Year
2024
CO2 Efficiency Class
D, E, F
CO2 Efficiency Class
B
Brand
Mercedes-Benz
Brand
Peugeot
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.