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Porsche Cayman vs BMW Z4 comparison

Compare performance (500 HP vs 340 HP), boot space and price (136,000 £ vs 43,500 £ ) at a glance. Find out which car is the better choice for you – Porsche Cayman or BMW Z4?

Porsche Cayman vs BMW Z4: Key differences

Porsche Cayman

  • noticeably more power
  • clearly quicker 0–100 km/h
  • marginally lighter
details

BMW Z4

4.4 (1 Reviews)
rate
  • clearly cheaper
  • considerably more efficient
  • visibly more trunk space
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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

Cayman

Costs and Efficiency:

Price and efficiency are key factors when choosing a car – and this is often where the real differences emerge.

BMW Z4 is clearly cheaper – starting at 43,500 £ , while the Porsche Cayman costs 136,000 £ . That’s a price difference of around 92,571 £.

Fuel consumption also shows a difference: the BMW Z4 uses 6.9 L/100km and is considerably more efficient than the Porsche Cayman with 13 L/100km. The difference is about 6.1 L/100km.

Z4

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 340 HP. That’s roughly 160 HP more horsepower.

When accelerating from 0 to 100 km/h, the Porsche Cayman is clearly quicker – completing the sprint in 3.4 s, while the BMW Z4 takes 4.5 s. That’s about 1.1 s quicker.

There’s also a difference in torque: the BMW Z4 delivers barely more torque with 500 Nm compared to 450 Nm. That’s about 50 Nm more.

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 marginally lighter – 1,490 kg compared to 1,510 kg. The difference is around 20 kg.

Looking at boot space, the BMW Z4 offers visibly more boot space – 281 L compared to 184 L. That’s a difference of about 97 L.

When it comes to payload, the Porsche Cayman carries slightly more – 281 kg compared to 235 kg. That’s a difference of about 46 kg.

Who wins the race in the data check?

The BMW Z4 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 £43,500
Z4

BMW Z4

  • Engine Type Petrol
  • Transmission Manuel, Automatic
  • Drive Type Rear-Wheel Drive
  • Power HP 197 - 340 HP
  • Consumption L/100km 6.9 - 8.5 L/100km
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Frequently compared as well

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BMW Z4
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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

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

BMW Z4

The BMW Z4 is a taut, road-hugging roadster that pairs elegant, low-slung styling with a roof you can drop on a sunny whim, delivering that pure, wind-in-your-hair driving thrill few cars manage to match. It’s an ideal weekend companion for drivers who prefer engagement over practicality — bring good shoes rather than a lot of luggage, and you’ll get a grin every time you turn the wheel.

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P90479457_highRes_bmw-z4-m40i-09-2022
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P90479471_highRes_bmw-z4-m40i-09-2022

Reviews BMW Z4

4.4 (1 Reviews)
rate
Maingard
26 Apr 2026, 13:19:10

Responsive car, very high-performing, very agile in corners.

How do you mainly use this car? (optional): Leisure / Weekend driver
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

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Porsche Cayman
BMW Z4

Costs and Consumption
Price
136,000 £
Price
43,500 - 65,300 £
Consumption L/100km
13 L/100km
Consumption L/100km
6.9 - 8.5 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
295 g/km
co2
157 - 191 g/km
Fuel tank capacity
54 L
Fuel tank capacity
-

Dimensions and Body
Body Type
Coupe
Body Type
Roadster
Seats
2
Seats
2
Doors
2
Doors
-
Curb weight
1,490 kg
Curb weight
1,510 - 1,640 kg
Trunk capacity
184 L
Trunk capacity
281 L
Length
4,456 mm
Length
-
Width
1,822 mm
Width
1,864 mm
Height
1,267 mm
Height
-
Max trunk capacity
272 L
Max trunk capacity
-
Payload
281 kg
Payload
215 - 235 kg

Engine and Performance
Engine Type
Petrol
Engine Type
Petrol
Transmission
Automatic
Transmission
Manuel, Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Manual Gearbox, Automatic Gearbox
Drive Type
Rear-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
500 HP
Power HP
197 - 340 HP
Acceleration 0-100km/h
3.4 s
Acceleration 0-100km/h
4.5 - 6.8 s
Max Speed
315 km/h
Max Speed
-
Torque
450 Nm
Torque
320 - 500 Nm
Number of Cylinders
6
Number of Cylinders
4 - 6
Power kW
368 kW
Power kW
145 - 250 kW
Engine capacity
3,996 cm3
Engine capacity
1,998 - 2,998 cm3

General
Model Year
2021
Model Year
2,025 - 2,026
CO2 Efficiency Class
G
CO2 Efficiency Class
F, G
Brand
Porsche
Brand
BMW
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.