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Mercedes CLA Coupe vs Porsche Cayman comparison

Compare performance (354 HP vs 500 HP), boot space and price (39,600 £ vs 136,000 £ ) at a glance. Find out which car is the better choice for you – Mercedes CLA Coupe or Porsche Cayman?

Mercedes CLA Coupe vs Porsche Cayman: Key differences

Mercedes CLA Coupe

4.8 (2 Reviews)
rate
  • significantly cheaper
  • substantially more efficient
  • considerably more trunk space
details

Porsche Cayman

  • noticeably more power
  • significantly quicker 0–100 km/h
  • a bit lighter
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

CLA Coupe

Costs and Efficiency:

When it comes to price and running costs, the biggest differences usually appear. This is often where you see which car fits your budget better in the long run.

Mercedes CLA Coupe is significantly cheaper – starting at 39,600 £ , while the Porsche Cayman costs 136,000 £ . That’s a price difference of around 96,392 £.

Fuel consumption also shows a difference: the Mercedes CLA Coupe uses 4.9 L/100km and is substantially more efficient than the Porsche Cayman with 13 L/100km. The difference is about 8.1 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 Porsche Cayman offers noticeably more power – delivering 500 HP compared to 354 HP. That’s roughly 146 HP more horsepower.

When accelerating from 0 to 100 km/h, the Porsche Cayman is significantly quicker – completing the sprint in 3.4 s, while the Mercedes CLA Coupe takes 4.9 s. That’s about 1.5 s quicker.

There’s also a difference in torque: the Mercedes CLA Coupe delivers slightly more torque with 515 Nm compared to 450 Nm. That’s about 65 Nm more.

CLA Coupe

Space and Everyday Use:

Whether family car or daily driver – which one offers more room, flexibility and comfort?

Seats: Mercedes CLA Coupe 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 CLA Coupe offers considerably more boot space – 405 L compared to 184 L. That’s a difference of about 221 L.

When it comes to payload, the Mercedes CLA Coupe carries noticeably more – 455 kg compared to 281 kg. That’s a difference of about 174 kg.

Who wins the race in the data check?

The Mercedes CLA Coupe is clearly superior 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 £39,600
CLA Coupe

Mercedes CLA Coupe

  • Engine Type Electric, Full Hybrid
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive, All-Wheel Drive, Front-Wheel Drive
  • Power HP 156 - 354 HP
  • Consumption L/100km 4.9 - 5.3 L/100km
  • Consumption kWh/100km 12.3 - 12.7 kWh/100km
  • Electric Range 542 - 792 km
details

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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes CLA Coupe

The Mercedes CLA Coupe cuts a rakish silhouette that blends sporty coupe lines with everyday practicality, giving style-minded buyers a premium image without shouting. Inside it feels more luxurious than its size suggests, with a slick cabin, intuitive tech and a composed ride — the kind of car that parties in the city and still shows up polished on Sunday morning.

details
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19C0225_068
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Reviews Mercedes CLA Coupe

4.8 (2 Reviews)
rate
marco
12 Mar 2026, 18:44:45

A car with a unique line — the shooting brake finally gets a sporty rear and a roomy trunk.

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
Dejf
18 Dec 2025, 14:59:40

Nice efficient car. Like it

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 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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Reviews Porsche Cayman

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

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Costs and Consumption
Price
39,600 - 60,000 £
Price
136,000 £
Consumption L/100km
4.9 - 5.3 L/100km
Consumption L/100km
13 L/100km
Consumption kWh/100km
12.3 - 12.7 kWh/100km
Consumption kWh/100km
-
Electric Range
542 - 792 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
0 - 120 g/km
co2
295 g/km
Fuel tank capacity
-
Fuel tank capacity
54 L

Dimensions and Body
Body Type
Coupe
Body Type
Coupe
Seats
5
Seats
2
Doors
-
Doors
2
Curb weight
1,695 - 2,135 kg
Curb weight
1,490 kg
Trunk capacity
405 L
Trunk capacity
184 L
Length
-
Length
4,456 mm
Width
1,855 mm
Width
1,822 mm
Height
-
Height
1,267 mm
Max trunk capacity
-
Max trunk capacity
272 L
Payload
430 - 455 kg
Payload
281 kg

Engine and Performance
Engine Type
Electric, Full Hybrid
Engine Type
Petrol
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Reduction Gearbox, Dual-Clutch Automatic
Transmission Detail
Dual-Clutch Automatic
Drive Type
Rear-Wheel Drive, All-Wheel Drive, Front-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
156 - 354 HP
Power HP
500 HP
Acceleration 0-100km/h
4.9 - 8.8 s
Acceleration 0-100km/h
3.4 s
Max Speed
-
Max Speed
315 km/h
Torque
280 - 515 Nm
Torque
450 Nm
Number of Cylinders
4
Number of Cylinders
6
Power kW
115 - 260 kW
Power kW
368 kW
Engine capacity
1,499 cm3
Engine capacity
3,996 cm3

General
Model Year
2,025 - 2,026
Model Year
2021
CO2 Efficiency Class
A, C, D
CO2 Efficiency Class
G
Brand
Mercedes-Benz
Brand
Porsche
What drivetrain options does the Mercedes CLA Coupe have?

The Mercedes CLA Coupe is available as Rear-Wheel Drive, All-Wheel Drive or Front-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.