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Porsche Cayman vs Mercedes C-Class Saloon comparison

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

Porsche Cayman vs Mercedes C-Class Saloon: Key differences

Porsche Cayman

  • a bit lighter
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Mercedes C-Class Saloon

  • significantly cheaper
  • markedly more power
  • clearly more efficient
  • clearly more trunk space
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By Achim Sedelmaier

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

Cayman

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 significantly 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.

C-Class Saloon

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 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 considerably more torque with 1,020 Nm compared to 450 Nm. That’s about 570 Nm more.

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

In terms of curb weight, Porsche Cayman is a bit 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 clearly 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
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

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

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
Mercedes C-Class Saloon

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

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

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

General
Model Year
2021
Model Year
2,024 - 2,025
CO2 Efficiency Class
G
CO2 Efficiency Class
E, D, G
Brand
Porsche
Brand
Mercedes-Benz
What drivetrain options does the Porsche Cayman have?

The Porsche Cayman is available as Rear-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.