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Mercedes S Class vs Porsche Cayman comparison

Compare performance (635 HP vs 500 HP), boot space and price (104,000 £ vs 136,000 £ ) at a glance. Find out which car is the better choice for you – Mercedes S Class or Porsche Cayman?

Mercedes S Class vs Porsche Cayman: Key differences

Mercedes S Class

  • markedly cheaper
  • visibly more power
  • considerably more efficient
details

Porsche Cayman

  • somewhat quicker 0–100 km/h
  • clearly lighter
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By Achim Sedelmaier

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

S Class

Costs and Efficiency:

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

Mercedes S Class is markedly cheaper – starting at 104,000 £ , while the Porsche Cayman costs 136,000 £ . That’s a price difference of around 32,009 £.

Fuel consumption also shows a difference: the Mercedes S Class uses 2.2 L/100km and is considerably more efficient than the Porsche Cayman with 13 L/100km. The difference is about 10.8 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 S Class offers visibly more power – delivering 635 HP compared to 500 HP. That’s roughly 135 HP more horsepower.

When accelerating from 0 to 100 km/h, the Porsche Cayman is somewhat quicker – completing the sprint in 3.4 s, while the Mercedes S Class takes 4 s. That’s about 0.6 s quicker.

There’s also a difference in torque: the Mercedes S Class delivers considerably more torque with 850 Nm compared to 450 Nm. That’s about 400 Nm more.

S Class

Space and Everyday Use:

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

Seats: Mercedes S Class offers more seats – 5 vs 2.

In terms of curb weight, Porsche Cayman is clearly lighter – 1,490 kg compared to 2,165 kg. The difference is around 675 kg.

When it comes to payload, the Mercedes S Class carries significantly more – 660 kg compared to 281 kg. That’s a difference of about 379 kg.

Who wins the race in the data check?

The Mercedes S Class 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 £104,000
S Class

Mercedes S Class

  • Engine Type : Petrol MHEV, Plugin Hybrid, Diesel MHEV
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive, Rear-Wheel Drive
  • Power HP : 336 - 635 HP
  • Consumption L/100km : 2.2 - 11 L/100km
  • Electric Range : 98 - 118 km
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Mercedes S Class
Porsche Cayman

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes S Class

The Mercedes S-Class wraps peerless comfort, whisper-quiet luxury and subtle tech wizardry into a chauffeur-ready package that still knows how to engage the driver. It’s the car for buyers who want to arrive relaxed, be taken seriously and occasionally enjoy a grin when the road reminds them this limousine can dance.

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Reviews Mercedes S Class

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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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Reviews Porsche Cayman

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Mercedes S Class
Porsche Cayman

Costs and Consumption
Price
104,000 - 201,400 £
Price
136,000 £
Consumption L/100km
2.2 - 11 L/100km
Consumption L/100km
13 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
98 - 118 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
50 - 252 g/km
co2
295 g/km
Fuel tank capacity
-
Fuel tank capacity
54 L

Dimensions and Body
Body Type
Sedan
Body Type
Coupe
Seats
5
Seats
2
Doors
-
Doors
2
Curb weight
2,165 - 2,650 kg
Curb weight
1,490 kg
Trunk capacity
-
Trunk capacity
184 L
Length
-
Length
4,456 mm
Width
1,921 mm
Width
1,822 mm
Height
-
Height
1,267 mm
Max trunk capacity
-
Max trunk capacity
272 L
Payload
420 - 660 kg
Payload
281 kg

Engine and Performance
Engine Type
Petrol MHEV, Plugin Hybrid, Diesel MHEV
Engine Type
Petrol
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
All-Wheel Drive, Rear-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
336 - 635 HP
Power HP
500 HP
Acceleration 0-100km/h
4 - 5.7 s
Acceleration 0-100km/h
3.4 s
Max Speed
-
Max Speed
315 km/h
Torque
560 - 850 Nm
Torque
450 Nm
Number of Cylinders
6 - 8
Number of Cylinders
6
Power kW
247 - 467 kW
Power kW
368 kW
Engine capacity
2,989 - 3,982 cm3
Engine capacity
3,996 cm3

General
Model Year
2026
Model Year
2021
CO2 Efficiency Class
G, B, F
CO2 Efficiency Class
G
Brand
Mercedes-Benz
Brand
Porsche
Is the Mercedes S Class offered with different drivetrains?

The Mercedes S Class is offered with All-Wheel Drive or 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.