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BMW 8 Series Convertible vs Audi A5 Sportback comparison

Compare performance (625 HP vs 639 HP), boot space and price (99,400 £ vs 40,200 £ ) at a glance. Find out which car is the better choice for you – BMW 8 Series Convertible or Audi A5 Sportback?

BMW 8 Series Convertible vs Audi A5 Sportback: Key differences

BMW 8 Series Convertible

  • a bit quicker 0–100 km/h
details

Audi A5 Sportback

  • substantially cheaper
  • barely more power
  • clearly more efficient
  • marginally lighter
  • visibly more trunk space
details

By Achim Sedelmaier

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

8 Series Convertible

Costs and Efficiency:

Price and efficiency are often the first things buyers look at. Here it becomes clear which model has the long-term edge – whether at the pump, the plug, or in purchase price.

Audi A5 Sportback is substantially cheaper – starting at 40,200 £ , while the BMW 8 Series Convertible costs 99,400 £ . That’s a price difference of around 59,228 £.

Fuel consumption also shows a difference: the Audi A5 Sportback uses 2 L/100km and is clearly more efficient than the BMW 8 Series Convertible with 6.9 L/100km. The difference is about 4.9 L/100km.

A5 Sportback

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 Audi A5 Sportback offers barely more power – delivering 639 HP compared to 625 HP. That’s roughly 14 HP more horsepower.

When accelerating from 0 to 100 km/h, the BMW 8 Series Convertible is a bit quicker – completing the sprint in 3.3 s, while the Audi A5 Sportback takes 3.7 s. That’s about 0.4 s quicker.

There’s also a difference in torque: the Audi A5 Sportback delivers marginally more torque with 825 Nm compared to 750 Nm. That’s about 75 Nm more.

8 Series Convertible

Space and Everyday Use:

Beyond pure performance, interior space and usability matter most in daily life. This is where you see which car is more practical and versatile.

Seats: Audi A5 Sportback offers more seats – 5 vs 4.

In terms of curb weight, Audi A5 Sportback is marginally lighter – 1,770 kg compared to 1,915 kg. The difference is around 145 kg.

Looking at boot space, the Audi A5 Sportback offers visibly more boot space – 445 L compared to 350 L. That’s a difference of about 95 L.

When it comes to payload, the Audi A5 Sportback carries moderately more – 530 kg compared to 425 kg. That’s a difference of about 105 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
details

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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

BMW 8 Series Convertible

The BMW 8 Series Convertible is a head-turning grand tourer that drops its roof with the kind of theatrical flourish you expect from a modern Bavarian showboat. It wraps occupants in sumptuous materials and driver-focused polish, offering effortless long-distance comfort and just enough drama to make every arrival feel like an occasion.

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Reviews BMW 8 Series Convertible

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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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BMW 8 Series Convertible
Audi A5 Sportback

Costs and Consumption
Price
99,400 - 165,800 £
Price
40,200 - 91,000 £
Consumption L/100km
6.9 - 11.2 L/100km
Consumption L/100km
2 - 7.6 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
84 - 110 km
Battery Capacity
-
Battery Capacity
-
co2
180 - 255 g/km
co2
45 - 172 g/km
Fuel tank capacity
66 - 68 L
Fuel tank capacity
-

Dimensions and Body
Body Type
Convertible
Body Type
Hatchback
Seats
4
Seats
5
Doors
2
Doors
-
Curb weight
1,915 - 2,125 kg
Curb weight
1,770 - 2,430 kg
Trunk capacity
350 L
Trunk capacity
331 - 445 L
Length
4,851 - 4,867 mm
Length
-
Width
1,902 - 1,907 mm
Width
1,860 - 1,952 mm
Height
1,345 - 1,353 mm
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
340 - 425 kg
Payload
475 - 530 kg

Engine and Performance
Engine Type
Diesel MHEV, Petrol
Engine Type
Plugin Hybrid, Petrol, Diesel MHEV, Petrol MHEV
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic, Automatic Gearbox
Drive Type
All-Wheel Drive, Rear-Wheel Drive
Drive Type
All-Wheel Drive, Front-Wheel Drive
Power HP
333 - 625 HP
Power HP
150 - 639 HP
Acceleration 0-100km/h
3.3 - 5.5 s
Acceleration 0-100km/h
3.7 - 9.8 s
Max Speed
250 km/h
Max Speed
-
Torque
500 - 750 Nm
Torque
280 - 825 Nm
Number of Cylinders
6 - 8
Number of Cylinders
4 - 6
Power kW
245 - 460 kW
Power kW
110 - 470 kW
Engine capacity
2,993 - 4,395 cm3
Engine capacity
1,968 - 2,995 cm3

General
Model Year
2024
Model Year
2,025 - 2,026
CO2 Efficiency Class
G
CO2 Efficiency Class
B, E, F, D
Brand
BMW
Brand
Audi
What drivetrain options does the BMW 8 Series Convertible have?

Available configurations include 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.