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Mercedes B Class vs Porsche Panamera comparison

Compare performance (238 HP vs 782 HP), boot space and price (33,100 £ vs 99,800 £ ) at a glance. Find out which car is the better choice for you – Mercedes B Class or Porsche Panamera?

Mercedes B Class vs Porsche Panamera: Key differences

Mercedes B Class

4.9 (5 Reviews)
rate
  • significantly cheaper
  • noticeably lighter
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Porsche Panamera

  • significantly more power
  • significantly more efficient
  • significantly quicker 0–100 km/h
  • marginally more trunk space
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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 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 significantly cheaper – starting at 33,100 £ , while the Porsche Panamera costs 99,800 £ . That’s a price difference of around 66,642 £.

Fuel consumption also shows a difference: the Porsche Panamera uses 3 L/100km and is significantly more efficient than the Mercedes B Class with 5.1 L/100km. The difference is about 2.1 L/100km.

Panamera

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 Porsche Panamera offers significantly more power – delivering 782 HP compared to 238 HP. That’s roughly 544 HP more horsepower.

When accelerating from 0 to 100 km/h, the Porsche Panamera is significantly quicker – completing the sprint in 2.9 s, while the Mercedes B Class takes 6.5 s. That’s about 3.6 s quicker.

There’s also a difference in torque: the Porsche Panamera delivers substantially more torque with 1,000 Nm compared to 400 Nm. That’s about 600 Nm more.

B Class

Space and Everyday Use:

Cabin size, boot volume and payload all play a role in everyday practicality. Here, comfort and flexibility make the difference.

Seats: Mercedes B Class offers more seats – 5 vs 4.

In terms of curb weight, Mercedes B Class is noticeably lighter – 1,405 kg compared to 1,960 kg. The difference is around 555 kg.

Looking at boot space, the Porsche Panamera offers marginally more boot space – 494 L compared to 455 L. That’s a difference of about 39 L.

When it comes to payload, the Mercedes B Class carries barely more – 550 kg compared to 545 kg. That’s a difference of about 5 kg.

Who wins the race in the data check?

The Porsche Panamera 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 £99,800
Panamera

Porsche Panamera

  • Engine Type Petrol, Plugin Hybrid
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive, All-Wheel Drive
  • Power HP 353 - 782 HP
  • Consumption L/100km 3 - 12 L/100km
  • Electric Range 83 - 97 km
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Frequently compared as well

Mercedes B Class
Mercedes GLA
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Mercedes B Class
Porsche Panamera

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.

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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

Porsche Panamera

The Porsche Panamera blends sports-car sharpness with luxury-sedan refinement, serving driving thrills up front while pampering passengers in the back. Poised, polished and mischievously quick, it’s the car for buyers who want exotic performance without losing everyday comfort.

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Reviews Porsche Panamera

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

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Mercedes B Class
Porsche Panamera

Costs and Consumption
Price
33,100 - 52,500 £
Price
99,800 - 212,100 £
Consumption L/100km
5.1 - 6.9 L/100km
Consumption L/100km
3 - 12 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
83 - 97 km
Battery Capacity
-
Battery Capacity
21.8 kWh
co2
133 - 156 g/km
co2
69 - 274 g/km
Fuel tank capacity
-
Fuel tank capacity
75 - 90 L

Dimensions and Body
Body Type
MPV
Body Type
Hatchback
Seats
5
Seats
4
Doors
-
Doors
5
Curb weight
1,405 - 1,565 kg
Curb weight
1,960 - 2,535 kg
Trunk capacity
445 - 455 L
Trunk capacity
421 - 494 L
Length
-
Length
5,052 - 5,204 mm
Width
1,796 mm
Width
1,937 mm
Height
-
Height
1,415 - 1,428 mm
Max trunk capacity
-
Max trunk capacity
1,255 - 1,385 L
Payload
515 - 550 kg
Payload
340 - 545 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel
Engine Type
Petrol, Plugin Hybrid
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Dual-Clutch Automatic
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
116 - 238 HP
Power HP
353 - 782 HP
Acceleration 0-100km/h
6.5 - 10 s
Acceleration 0-100km/h
2.9 - 5.3 s
Max Speed
-
Max Speed
270 - 325 km/h
Torque
200 - 400 Nm
Torque
500 - 1,000 Nm
Number of Cylinders
4
Number of Cylinders
6 - 8
Power kW
85 - 175 kW
Power kW
260 - 575 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
2,894 - 3,996 cm3

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
D, E, F
CO2 Efficiency Class
G, B, C
Brand
Mercedes-Benz
Brand
Porsche
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.