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Mercedes AMG GT vs Porsche Cayman comparison

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

Mercedes AMG GT vs Porsche Cayman: Key differences

Mercedes AMG GT

  • noticeably cheaper
  • visibly more power
  • visibly more efficient
  • visibly quicker 0–100 km/h

Porsche Cayman

  • noticeably lighter

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

AMG GT

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 AMG GT is noticeably 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 visibly more efficient than the Porsche Cayman with 13 L/100km. The difference is about 2.7 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 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 visibly 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 significantly more torque with 1,420 Nm compared to 450 Nm. That’s about 970 Nm more.

AMG GT

Space and Everyday Use:

Cabin size, boot volume and payload all play a role in everyday practicality. Here, comfort and flexibility make the difference.

Both vehicles offer seating for 2 people.

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

When it comes to payload, the Porsche Cayman carries noticeably 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 holds a decisive overall lead 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
Mercedes AMG GT
Porsche Cayman

Costs and Consumption

View detailed analysis

Engine and Performance

View detailed analysis

Dimensions and Body

View detailed analysis

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.

details

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.

details
Mercedes AMG GT
Porsche Cayman

Costs and Consumption

Price
102,500 - 194,400 £
Price
136,000 £
Consumption L/100km
10.3 - 14 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
235 - 319 g/km
co2
295 g/km
Fuel tank capacity
-
Fuel tank capacity
54 L

Dimensions and Body

Body Type
Coupe
Body Type
Coupe
Seats
2
Seats
2
Doors
-
Doors
2
Curb weight
1,790 - 2,195 kg
Curb weight
1,490 kg
Trunk capacity
-
Trunk capacity
184 L
Length
-
Length
4,456 mm
Width
1,929 mm
Width
1,822 mm
Height
-
Height
1,267 mm
Max trunk capacity
-
Max trunk capacity
272 L
Payload
170 - 215 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
Rear-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
435 - 816 HP
Power HP
500 HP
Acceleration 0-100km/h
2.8 - 4.6 s
Acceleration 0-100km/h
3.4 s
Max Speed
-
Max Speed
315 km/h
Torque
500 - 1,420 Nm
Torque
450 Nm
Number of Cylinders
4 - 8
Number of Cylinders
6
Power kW
320 - 600 kW
Power kW
368 kW
Engine capacity
1,991 - 3,982 cm3
Engine capacity
3,996 cm3

General

Model Year
2,025
Model Year
2,021
CO2 Efficiency Class
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.