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Mercedes AMG GT 4-Door Coupé vs Porsche Cayman comparison

Compare performance (843 HP vs 500 HP), boot space and price (97,200 £ vs 136,000 £ ) at a glance. Find out which car is the better choice for you – Mercedes AMG GT 4-Door Coupé or Porsche Cayman?

Mercedes AMG GT 4-Door Coupé vs Porsche Cayman: Key differences

Mercedes AMG GT 4-Door Coupé

  • clearly cheaper
  • clearly more power
  • visibly more efficient
  • moderately quicker 0–100 km/h
  • significantly more trunk space
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Porsche Cayman

  • clearly lighter
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By Achim Sedelmaier

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

AMG GT 4-Door Coupé

Costs and Efficiency:

Looking at overall running costs, both models reveal some interesting differences in everyday economy.

Mercedes AMG GT 4-Door Coupé is clearly cheaper – starting at 97,200 £ , while the Porsche Cayman costs 136,000 £ . That’s a price difference of around 38,817 £.

Fuel consumption also shows a difference: the Mercedes AMG GT 4-Door Coupé uses 9.5 L/100km and is visibly more efficient than the Porsche Cayman with 13 L/100km. The difference is about 3.5 L/100km.

Cayman

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 4-Door Coupé offers clearly more power – delivering 843 HP compared to 500 HP. That’s roughly 343 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes AMG GT 4-Door Coupé is moderately quicker – completing the sprint in 2.9 s, while the Porsche Cayman takes 3.4 s. That’s about 0.5 s quicker.

Looking at top speed, the Mercedes AMG GT 4-Door Coupé is barely faster – reaching 316 km/h, while the Porsche Cayman tops out at 315 km/h. The difference is around 1 km/h.

There’s also a difference in torque: the Mercedes AMG GT 4-Door Coupé delivers substantially more torque with 1,470 Nm compared to 450 Nm. That’s about 1,020 Nm more.

AMG GT 4-Door Coupé

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 AMG GT 4-Door Coupé offers more seats – 4 vs 2.

In terms of curb weight, Porsche Cayman is clearly lighter – 1,490 kg compared to 2,040 kg. The difference is around 550 kg.

Looking at boot space, the Mercedes AMG GT 4-Door Coupé offers significantly more boot space – 461 L compared to 184 L. That’s a difference of about 277 L.

When it comes to payload, the Mercedes AMG GT 4-Door Coupé carries considerably more – 510 kg compared to 281 kg. That’s a difference of about 229 kg.

Who wins the race in the data check?

The Mercedes AMG GT 4-Door Coupé 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 £97,200
AMG GT 4-Door Coupé

Mercedes AMG GT 4-Door Coupé

  • Engine Type : Petrol MHEV, Petrol, Plugin Hybrid
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive
  • Power HP : 389 - 843 HP
  • Consumption L/100km : 9.5 - 12.7 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

Mercedes AMG GT 4-Door Coupé

The Mercedes-AMG GT 4-Door Coupé transforms AMG's sports-car attitude into a surprisingly practical four-door package, pairing dramatic coupe looks with an interior that's both luxurious and genuinely usable. It's the choice for buyers who want supercar charisma without losing daily comfort — dramatic presence, a rorty soundtrack, and a chassis that turns routine drives into something worth smiling about.

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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 AMG GT 4-Door Coupé
Porsche Cayman

Costs and Consumption
Price
97,200 - 182,100 £
Price
136,000 £
Consumption L/100km
9.5 - 12.7 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
215 - 287 g/km
co2
295 g/km
Fuel tank capacity
73 - 80 L
Fuel tank capacity
54 L

Dimensions and Body
Body Type
Coupe
Body Type
Coupe
Seats
4
Seats
2
Doors
5
Doors
2
Curb weight
2,040 - 2,380 kg
Curb weight
1,490 kg
Trunk capacity
335 - 461 L
Trunk capacity
184 L
Length
5,054 mm
Length
4,456 mm
Width
1,953 mm
Width
1,822 mm
Height
1,447 - 1,455 mm
Height
1,267 mm
Max trunk capacity
-
Max trunk capacity
272 L
Payload
380 - 510 kg
Payload
281 kg

Engine and Performance
Engine Type
Petrol MHEV, Petrol, Plugin Hybrid
Engine Type
Petrol
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
All-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
389 - 843 HP
Power HP
500 HP
Acceleration 0-100km/h
2.9 - 4.9 s
Acceleration 0-100km/h
3.4 s
Max Speed
270 - 316 km/h
Max Speed
315 km/h
Torque
500 - 1,470 Nm
Torque
450 Nm
Number of Cylinders
6 - 8
Number of Cylinders
6
Power kW
286 - 620 kW
Power kW
368 kW
Engine capacity
2,999 - 3,982 cm3
Engine capacity
3,996 cm3

General
Model Year
2025
Model Year
2021
CO2 Efficiency Class
G
CO2 Efficiency Class
G
Brand
Mercedes-Benz
Brand
Porsche
Is the Mercedes AMG GT 4-Door Coupé offered with different drivetrains?

The Mercedes AMG GT 4-Door Coupé is offered with 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.