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smart #3 vs Porsche Cayman comparison

Compare performance (272 HP vs 500 HP), boot space and price (42,000 £ vs 136,000 £ ) at a glance. Find out which car is the better choice for you – smart #3 or Porsche Cayman?

smart #3 vs Porsche Cayman: Key differences

smart #3

5 (1 Reviews)
rate
  • significantly cheaper
  • considerably more trunk space
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Porsche Cayman

  • substantially more power
  • clearly quicker 0–100 km/h
  • clearly lighter
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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

#3

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.

smart #3 is significantly cheaper – starting at 42,000 £ , while the Porsche Cayman costs 136,000 £ . That’s a price difference of around 94,037 £.

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 Porsche Cayman offers substantially more power – delivering 500 HP compared to 272 HP. That’s roughly 228 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 smart #3 takes 5.8 s. That’s about 2.4 s quicker.

There’s also a difference in torque: the Porsche Cayman delivers moderately more torque with 450 Nm compared to 384 Nm. That’s about 66 Nm more.

#3

Space and Everyday Use:

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

Seats: smart #3 offers more seats – 5 vs 2.

In terms of curb weight, Porsche Cayman is clearly lighter – 1,490 kg compared to 1,810 kg. The difference is around 320 kg.

Looking at boot space, the smart #3 offers considerably more boot space – 370 L compared to 184 L. That’s a difference of about 186 L.

When it comes to payload, the smart #3 carries clearly more – 450 kg compared to 281 kg. That’s a difference of about 169 kg.

Who wins the race in the data check?

The smart #3 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.

£41,991
#3

smart #3

  • Engine Type Electric
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive
  • Power HP 272 HP
  • Consumption kWh/100km 16.3 kWh/100km
  • Electric Range 455 km
details

Frequently compared as well

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Porsche Cayman

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

smart #3

The Smart #3 turns the brand's cheeky city-car attitude into a grown-up compact SUV, pairing sleek styling with a surprisingly roomy, well-made interior. It's a brilliant pick for buyers who want electric ease without dullness — practical enough for daily life, but still lively enough to make parking and grocery runs feel a little fun.

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smart-hashtag3-brabus-photon-orange-exterior-mallorca1
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smart-hashtag3-brabus-photon-orange-exterior-mallorca21
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smart-hashtag3-premium-ceramic-cream-interior-mallorca7

Reviews smart #3

5 (1 Reviews)
rate
Ronny
16 Oct 2025, 13:10:59

Handsome design, packed with advanced driver‑assist technology and stellar performance — all at an attractive price. Highly recommended, this car!

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.

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Costs and Consumption
Price
42,000 £
Price
136,000 £
Consumption L/100km
-
Consumption L/100km
13 L/100km
Consumption kWh/100km
16.3 kWh/100km
Consumption kWh/100km
-
Electric Range
455 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
0 g/km
co2
295 g/km
Fuel tank capacity
-
Fuel tank capacity
54 L

Dimensions and Body
Body Type
SUV
Body Type
Coupe
Seats
5
Seats
2
Doors
-
Doors
2
Curb weight
1,810 kg
Curb weight
1,490 kg
Trunk capacity
370 L
Trunk capacity
184 L
Length
-
Length
4,456 mm
Width
1,844 mm
Width
1,822 mm
Height
-
Height
1,267 mm
Max trunk capacity
-
Max trunk capacity
272 L
Payload
450 kg
Payload
281 kg

Engine and Performance
Engine Type
Electric
Engine Type
Petrol
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Reduction Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
Rear-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
272 HP
Power HP
500 HP
Acceleration 0-100km/h
5.8 s
Acceleration 0-100km/h
3.4 s
Max Speed
-
Max Speed
315 km/h
Torque
384 Nm
Torque
450 Nm
Number of Cylinders
-
Number of Cylinders
6
Power kW
200 kW
Power kW
368 kW
Engine capacity
-
Engine capacity
3,996 cm3

General
Model Year
2025
Model Year
2021
CO2 Efficiency Class
A
CO2 Efficiency Class
G
Brand
smart
Brand
Porsche
What drivetrain options does the smart #3 have?

The smart #3 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.