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Mercedes B Class vs Peugeot 508 comparison

Compare performance (238 HP vs 360 HP), boot space and price (33,100 £ vs 44,600 £ ) at a glance. Find out which car is the better choice for you – Mercedes B Class or Peugeot 508?

Mercedes B Class vs Peugeot 508: Key differences

Mercedes B Class

4.9 (6 Reviews)
rate
  • markedly cheaper
  • visibly lighter
details

Peugeot 508

4.9 (2 Reviews)
rate
  • clearly more power
  • clearly more efficient
  • visibly quicker 0–100 km/h
  • only slightly 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.

Here’s where it gets real: The technical differences in detail

B Class

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.

Mercedes B Class is markedly cheaper – starting at 33,100 £ , while the Peugeot 508 costs 44,600 £ . That’s a price difference of around 11,442 £.

Fuel consumption also shows a difference: the Peugeot 508 uses 1.6 L/100km and is clearly more efficient than the Mercedes B Class with 5.1 L/100km. The difference is about 3.5 L/100km.

508

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 offers clearly 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 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 delivers noticeably more torque with 520 Nm compared to 400 Nm. That’s about 120 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, Mercedes B Class is visibly lighter – 1,405 kg compared to 1,811 kg. The difference is around 406 kg.

Looking at boot space, the Peugeot 508 offers only slightly more boot space – 487 L compared to 455 L. That’s a difference of about 32 L.

When it comes to payload, the Mercedes B Class carries a bit more – 550 kg compared to 469 kg. That’s a difference of about 81 kg.

Who wins the race in the data check?

The Peugeot 508 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 £44,600
508

Peugeot 508

  • Engine Type Plug-in Hybrid
  • Transmission Automatic
  • Drive Type Front-Wheel Drive, All-Wheel Drive
  • Power HP 180 - 360 HP
  • Consumption L/100km 1.6 - 2 L/100km
  • Electric Range 46 - 55 km
details

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 …
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Mercedes B Class
Peugeot 508

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
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Reviews Mercedes B Class

4.9 (6 Reviews)
rate
SiBa
31 Jul 2026, 14:51:34

We've been driving only the B180D automatic for 9 years — there's nothing better. Great on long trips; the next one will be another B180D automatic.

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

The Peugeot 508 turns heads with a low-slung, almost coupe-like silhouette and a cabin that feels grown-up and surprisingly premium for the money. On the road it balances comfort and poise with a playful edge, making it a convincing choice for buyers who want something stylish and sensible without shouting for attention.

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Reviews Peugeot 508

4.9 (2 Reviews)
rate
ANDRZEJ
21 Jan 2026, 14:22:12

I've had the 225 Hybrid GT for two years. Super car if you have, say, solar panels on the roof and charge from a socket — with a 10–15 km commute you drive on electricity for next to nothing. On the motorway at 140 km/h it uses about 6.0–6.3 l/100 km, superb comfort and quietness — and that stylish look!!!

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

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Mercedes B Class
Peugeot 508

Costs and Consumption
Price
33,100 - 52,500 £
Price
44,600 - 60,800 £
Consumption L/100km
5.1 - 6.9 L/100km
Consumption L/100km
1.6 - 2 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
46 - 55 km
Battery Capacity
-
Battery Capacity
-
co2
133 - 156 g/km
co2
36 - 45 g/km
Fuel tank capacity
-
Fuel tank capacity
43 L

Dimensions and Body
Body Type
MPV
Body Type
Hatchback
Seats
5
Seats
5
Doors
-
Doors
5
Curb weight
1,405 - 1,565 kg
Curb weight
1,811 - 1,941 kg
Trunk capacity
445 - 455 L
Trunk capacity
487 L
Length
-
Length
4,750 mm
Width
1,796 mm
Width
1,859 mm
Height
-
Height
1,403 mm
Max trunk capacity
-
Max trunk capacity
1,537 L
Payload
515 - 550 kg
Payload
379 - 469 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel
Engine Type
Plug-in 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 - 8.2 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.