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BMW 8 Series Convertible vs Mercedes SL Class comparison

Compare performance (625 HP vs 816 HP), boot space and price (99,400 £ vs 112,700 £ ) at a glance. Find out which car is the better choice for you – BMW 8 Series Convertible or Mercedes SL Class?

BMW 8 Series Convertible vs Mercedes SL Class: Key differences

BMW 8 Series Convertible

  • somewhat cheaper
  • visibly more efficient

Mercedes SL Class

  • markedly more power
  • slightly quicker 0–100 km/h
  • barely lighter

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

8 Series Convertible

Costs and Efficiency:

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

BMW 8 Series Convertible is somewhat cheaper – starting at 99,400 £ , while the Mercedes SL Class costs 112,700 £ . That’s a price difference of around 13,276 £.

Fuel consumption also shows a difference: the BMW 8 Series Convertible uses 6.9 L/100km and is visibly more efficient than the Mercedes SL Class with 9 L/100km. The difference is about 2.1 L/100km.

SL Class

Engine and Performance:

Under the bonnet, it becomes clear which model is tuned for sportiness and which one takes the lead when you hit the accelerator.

When it comes to engine power, the Mercedes SL Class offers markedly more power – delivering 816 HP compared to 625 HP. That’s roughly 191 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes SL Class is slightly quicker – completing the sprint in 2.9 s, while the BMW 8 Series Convertible takes 3.3 s. That’s about 0.4 s quicker.

There’s also a difference in torque: the Mercedes SL Class delivers considerably more torque with 1,420 Nm compared to 750 Nm. That’s about 670 Nm more.

8 Series Convertible

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 4 people.

In terms of curb weight, Mercedes SL Class is barely lighter – 1,810 kg compared to 1,915 kg. The difference is around 105 kg.

When it comes to payload, the BMW 8 Series Convertible carries somewhat more – 425 kg compared to 375 kg. That’s a difference of about 50 kg.

Who wins the race in the data check?

The Mercedes SL Class comes out modestly 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 £112,700
SL Class

Mercedes SL Class

  • Engine Type : Petrol MHEV, Petrol, Plugin Hybrid
  • Transmission : Automatic
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 381 - 816 HP
  • Consumption L/100km : 9 - 13.6 L/100km
  • Electric Range : 12 km
details

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View detailed analysis

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View detailed analysis

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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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Mercedes SL Class

The Mercedes SL blends timeless elegance with a cheeky sense of occasion, its retractable roof turning any commute into a small celebratory parade. Behind the wheel it behaves like a grown-up sports car that prefers comfort and presence over headline-grabbing bravado, making it a tempting choice for buyers who want to arrive in style.

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BMW 8 Series Convertible
Mercedes SL Class

Costs and Consumption
Price
99,400 - 165,800 £
Price
112,700 - 219,300 £
Consumption L/100km
6.9 - 11.2 L/100km
Consumption L/100km
9 - 13.6 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
12 km
Battery Capacity
-
Battery Capacity
-
co2
180 - 255 g/km
co2
206 - 309 g/km
Fuel tank capacity
66 - 68 L
Fuel tank capacity
-

Dimensions and Body
Body Type
Convertible
Body Type
Roadster
Seats
4
Seats
4
Doors
2
Doors
-
Curb weight
1,915 - 2,125 kg
Curb weight
1,810 - 2,195 kg
Trunk capacity
350 L
Trunk capacity
-
Length
4,851 - 4,867 mm
Length
-
Width
1,902 - 1,907 mm
Width
1,915 mm
Height
1,345 - 1,353 mm
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
340 - 425 kg
Payload
145 - 375 kg

Engine and Performance
Engine Type
Diesel MHEV, Petrol
Engine Type
Petrol MHEV, Petrol, Plugin Hybrid
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Automatic Gearbox
Drive Type
All-Wheel Drive, Rear-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
333 - 625 HP
Power HP
381 - 816 HP
Acceleration 0-100km/h
3.3 - 5.5 s
Acceleration 0-100km/h
2.9 - 4.9 s
Max Speed
250 km/h
Max Speed
-
Torque
500 - 750 Nm
Torque
480 - 1,420 Nm
Number of Cylinders
6 - 8
Number of Cylinders
4 - 8
Power kW
245 - 460 kW
Power kW
280 - 600 kW
Engine capacity
2,993 - 4,395 cm3
Engine capacity
1,991 - 3,982 cm3

General
Model Year
2,024
Model Year
2,025
CO2 Efficiency Class
G
CO2 Efficiency Class
G
Brand
BMW
Brand
Mercedes-Benz
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.