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Porsche Cayman vs Mercedes AMG GT comparison

Compare performance (500 HP vs 816 HP), boot space and price (136,000 £ vs 102,500 £ ) at a glance. Find out which car is the better choice for you – Porsche Cayman or Mercedes AMG GT?

Porsche Cayman vs Mercedes AMG GT: Key differences

Porsche Cayman

  • clearly lighter
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Mercedes AMG GT

  • visibly cheaper
  • visibly more power
  • clearly more efficient
  • clearly quicker 0–100 km/h
  • significantly 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 key factors when choosing a car – and this is often where the real differences emerge.

Mercedes AMG GT is visibly cheaper – starting at 102,500 £ , while the Porsche Cayman costs 136,000 £ . That’s a price difference of around 33,524 £.

Fuel consumption also shows a difference: the Mercedes AMG GT uses 10.3 L/100km and is clearly more efficient than the Porsche Cayman with 13 L/100km. The difference is about 2.7 L/100km.

AMG GT

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 AMG GT offers visibly more power – delivering 816 HP compared to 500 HP. That’s roughly 316 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes AMG GT is clearly quicker – completing the sprint in 2.8 s, while the Porsche Cayman takes 3.4 s. That’s about 0.6 s quicker.

There’s also a difference in torque: the Mercedes AMG GT delivers considerably more torque with 1,420 Nm compared to 450 Nm. That’s about 970 Nm more.

Space and Everyday Use:

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

Both vehicles offer seating for 2 people.

In terms of curb weight, Porsche Cayman is clearly lighter – 1,490 kg compared to 1,790 kg. The difference is around 300 kg.

Looking at boot space, the Mercedes AMG GT offers significantly more boot space – 321 L compared to 184 L. That’s a difference of about 137 L.

When it comes to payload, the Porsche Cayman carries visibly more – 281 kg compared to 215 kg. That’s a difference of about 66 kg.

Who wins the race in the data check?

The Mercedes AMG GT is decisively ahead 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 £102,500
AMG GT

Mercedes AMG GT

  • Engine Type Petrol MHEV, Petrol, Plugin Hybrid
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive, All-Wheel Drive
  • Power HP 435 - 816 HP
  • Consumption L/100km 10.3 - 14 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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Reviews Porsche Cayman

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Mercedes AMG GT

The Mercedes-AMG GT is a theatrical sports car with prowling looks and an aggressive exhaust note that announces its intentions the moment it fires up. It pairs ferocious performance with surprising everyday usability — a taut yet forgiving chassis and a cockpit that feels special — making sensible buyers suddenly very good at justifying indulgence.

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Costs and Consumption
Price
136,000 £
Price
102,500 - 194,400 £
Consumption L/100km
13 L/100km
Consumption L/100km
10.3 - 14 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
11 km
Battery Capacity
-
Battery Capacity
-
co2
295 g/km
co2
235 - 319 g/km
Fuel tank capacity
54 L
Fuel tank capacity
-

Dimensions and Body
Body Type
Coupe
Body Type
Coupe
Seats
2
Seats
2
Doors
2
Doors
-
Curb weight
1,490 kg
Curb weight
1,790 - 2,195 kg
Trunk capacity
184 L
Trunk capacity
182 - 321 L
Length
4,456 mm
Length
-
Width
1,822 mm
Width
1,929 mm
Height
1,267 mm
Height
-
Max trunk capacity
272 L
Max trunk capacity
-
Payload
281 kg
Payload
170 - 215 kg

Engine and Performance
Engine Type
Petrol
Engine Type
Petrol MHEV, Petrol, 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
435 - 816 HP
Acceleration 0-100km/h
3.4 s
Acceleration 0-100km/h
2.8 - 4.6 s
Max Speed
315 km/h
Max Speed
-
Torque
450 Nm
Torque
500 - 1,420 Nm
Number of Cylinders
6
Number of Cylinders
4 - 8
Power kW
368 kW
Power kW
320 - 600 kW
Engine capacity
3,996 cm3
Engine capacity
1,991 - 3,982 cm3

General
Model Year
2021
Model Year
2025
CO2 Efficiency Class
G
CO2 Efficiency Class
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.