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Mercedes C-Class Saloon vs Porsche Cayman comparison

Compare performance (680 HP vs 500 HP), boot space and price (41,300 £ vs 136,000 £ ) at a glance. Find out which car is the better choice for you – Mercedes C-Class Saloon or Porsche Cayman?

Mercedes C-Class Saloon vs Porsche Cayman: Key differences

Mercedes C-Class Saloon

  • substantially cheaper
  • markedly more power
  • clearly more efficient
  • substantially more trunk space
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Porsche Cayman

  • slightly lighter
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By Achim Sedelmaier

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

C-Class Saloon

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 C-Class Saloon is substantially cheaper – starting at 41,300 £ , while the Porsche Cayman costs 136,000 £ . That’s a price difference of around 94,703 £.

Fuel consumption also shows a difference: the Mercedes C-Class Saloon uses 4.5 L/100km and is clearly more efficient than the Porsche Cayman with 13 L/100km. The difference is about 8.5 L/100km.

Cayman

Engine and Performance:

Power, torque and acceleration say a lot about how a car feels on the road. This is where you see which model delivers more driving dynamics.

When it comes to engine power, the Mercedes C-Class Saloon offers markedly more power – delivering 680 HP compared to 500 HP. That’s roughly 180 HP more horsepower.

Both models accelerate almost equally fast – 3.4 s from 0 to 100 km/h.

There’s also a difference in torque: the Mercedes C-Class Saloon delivers significantly more torque with 1,020 Nm compared to 450 Nm. That’s about 570 Nm more.

C-Class Saloon

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.

Seats: Mercedes C-Class Saloon offers more seats – 5 vs 2.

In terms of curb weight, Porsche Cayman is slightly lighter – 1,490 kg compared to 1,695 kg. The difference is around 205 kg.

Looking at boot space, the Mercedes C-Class Saloon offers substantially more boot space – 455 L compared to 184 L. That’s a difference of about 271 L.

When it comes to payload, the Mercedes C-Class Saloon carries clearly more – 570 kg compared to 281 kg. That’s a difference of about 289 kg.

Who wins the race in the data check?

The Mercedes C-Class Saloon 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 £41,300
C-Class Saloon

Mercedes C-Class Saloon

  • Engine Type Petrol MHEV, Diesel MHEV, Plugin Hybrid
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive, All-Wheel Drive
  • Power HP 183 - 680 HP
  • Consumption L/100km 4.5 - 9 L/100km
  • Electric Range 11 km
Mercedes C-Class Saloon
Porsche Cayman

Costs and Consumption

View detailed analysis

Engine and Performance

View detailed analysis

Dimensions and Body

View detailed analysis

Mercedes C-Class Saloon

The Mercedes C‑Class is the compact executive that dresses like it owns the boulevard, with an interior that blends modern elegance and plush comfort to make everyday driving feel unexpectedly special. On the road it pairs poise with a hint of cheeky agility, rewarding drivers who want refinement without forfeiting a touch of fun — and yes, it still looks great in the driveway.

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Porsche Cayman

The Porsche Cayman stands out as a quintessential sports car, blending sleek design with dynamic handling. Its mid-engine layout provides an excellent balance and sharp agility that driving enthusiasts crave. Inside, the Cayman offers a refined and driver-focused interior, ensuring that every journey is an exhilarating experience.

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Mercedes C-Class Saloon
Porsche Cayman

Costs and Consumption

Price
41,300 - 103,400 £
Price
136,000 £
Consumption L/100km
4.5 - 9 L/100km
Consumption L/100km
13 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
11 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
119 - 205 g/km
co2
295 g/km
Fuel tank capacity
-
Fuel tank capacity
54 L

Dimensions and Body

Body Type
Sedan
Body Type
Coupe
Seats
5
Seats
2
Doors
-
Doors
2
Curb weight
1,695 - 2,165 kg
Curb weight
1,490 kg
Trunk capacity
280 - 455 L
Trunk capacity
184 L
Length
-
Length
4,456 mm
Width
1,820 - 1,900 mm
Width
1,822 mm
Height
-
Height
1,267 mm
Max trunk capacity
-
Max trunk capacity
272 L
Payload
485 - 570 kg
Payload
281 kg

Engine and Performance

Engine Type
Petrol MHEV, Diesel MHEV, Plugin Hybrid
Engine Type
Petrol
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
183 - 680 HP
Power HP
500 HP
Acceleration 0-100km/h
3.4 - 8.6 s
Acceleration 0-100km/h
3.4 s
Max Speed
-
Max Speed
315 km/h
Torque
250 - 1,020 Nm
Torque
450 Nm
Number of Cylinders
4
Number of Cylinders
6
Power kW
135 - 500 kW
Power kW
368 kW
Engine capacity
1,496 - 1,999 cm3
Engine capacity
3,996 cm3

General

Model Year
2,024 - 2,025
Model Year
2021
CO2 Efficiency Class
E, D, G
CO2 Efficiency Class
G
Brand
Mercedes-Benz
Brand
Porsche
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.