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Audi A5 Sportback vs Porsche Cayman comparison

Compare performance (639 HP vs 500 HP), boot space and price (40,200 £ vs 136,000 £ ) at a glance. Find out which car is the better choice for you – Audi A5 Sportback or Porsche Cayman?

Audi A5 Sportback vs Porsche Cayman: Key differences

Audi A5 Sportback

  • considerably cheaper
  • clearly more power
  • considerably more efficient
  • substantially more trunk space
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Porsche Cayman

  • marginally quicker 0–100 km/h
  • moderately lighter
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By Achim Sedelmaier

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

A5 Sportback

Costs and Efficiency:

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

Audi A5 Sportback is considerably cheaper – starting at 40,200 £ , while the Porsche Cayman costs 136,000 £ . That’s a price difference of around 95,828 £.

Fuel consumption also shows a difference: the Audi A5 Sportback uses 2 L/100km and is considerably more efficient than the Porsche Cayman with 13 L/100km. The difference is about 11 L/100km.

Cayman

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 Audi A5 Sportback offers clearly more power – delivering 639 HP compared to 500 HP. That’s roughly 139 HP more horsepower.

When accelerating from 0 to 100 km/h, the Porsche Cayman is marginally quicker – completing the sprint in 3.4 s, while the Audi A5 Sportback takes 3.7 s. That’s about 0.3 s quicker.

There’s also a difference in torque: the Audi A5 Sportback delivers clearly more torque with 825 Nm compared to 450 Nm. That’s about 375 Nm more.

A5 Sportback

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: Audi A5 Sportback offers more seats – 5 vs 2.

In terms of curb weight, Porsche Cayman is moderately lighter – 1,490 kg compared to 1,770 kg. The difference is around 280 kg.

Looking at boot space, the Audi A5 Sportback offers substantially more boot space – 331 L compared to 184 L. That’s a difference of about 147 L.

When it comes to payload, the Audi A5 Sportback carries clearly more – 530 kg compared to 281 kg. That’s a difference of about 249 kg.

Who wins the race in the data check?

The Audi A5 Sportback is decisively ahead 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 £40,200
A5 Sportback

Audi A5 Sportback

  • Engine Type Plugin Hybrid, Petrol, Diesel MHEV, Petrol MHEV
  • Transmission Automatic
  • Drive Type All-Wheel Drive, Front-Wheel Drive
  • Power HP 150 - 639 HP
  • Consumption L/100km 2 - 7.6 L/100km
  • Electric Range 84 - 110 km
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View detailed analysis

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View detailed analysis

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Audi A5 Sportback

The Audi A5 Sportback dresses up sleek coupe proportions with the everyday sense of a practical hatchback, so you get striking looks without the compromises. Behind the wheel it balances poise and comfort with premium trimmings that make daily driving feel a little bit special — ideal for buyers who want style and substance in equal measure.

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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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Porsche Cayman

Costs and Consumption
Price
40,200 - 91,000 £
Price
136,000 £
Consumption L/100km
2 - 7.6 L/100km
Consumption L/100km
13 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
84 - 110 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
45 - 172 g/km
co2
295 g/km
Fuel tank capacity
-
Fuel tank capacity
54 L

Dimensions and Body
Body Type
Hatchback
Body Type
Coupe
Seats
5
Seats
2
Doors
-
Doors
2
Curb weight
1,770 - 2,430 kg
Curb weight
1,490 kg
Trunk capacity
331 L
Trunk capacity
184 L
Length
-
Length
4,456 mm
Width
1,860 - 1,952 mm
Width
1,822 mm
Height
-
Height
1,267 mm
Max trunk capacity
-
Max trunk capacity
272 L
Payload
475 - 530 kg
Payload
281 kg

Engine and Performance
Engine Type
Plugin Hybrid, Petrol, Diesel MHEV, Petrol MHEV
Engine Type
Petrol
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic, Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
All-Wheel Drive, Front-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
150 - 639 HP
Power HP
500 HP
Acceleration 0-100km/h
3.7 - 9.8 s
Acceleration 0-100km/h
3.4 s
Max Speed
-
Max Speed
315 km/h
Torque
280 - 825 Nm
Torque
450 Nm
Number of Cylinders
4 - 6
Number of Cylinders
6
Power kW
110 - 470 kW
Power kW
368 kW
Engine capacity
1,968 - 2,995 cm3
Engine capacity
3,996 cm3

General
Model Year
2,025 - 2,026
Model Year
2021
CO2 Efficiency Class
B, E, F, D
CO2 Efficiency Class
G
Brand
Audi
Brand
Porsche
What drivetrain options does the Audi A5 Sportback have?

The Audi A5 Sportback is available as All-Wheel Drive or Front-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.