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BMW 8 Series Convertible vs Mercedes S Class comparison

Compare performance (625 HP vs 635 HP), boot space and price (99,400 £ vs 104,000 £ ) at a glance. Find out which car is the better choice for you – BMW 8 Series Convertible or Mercedes S Class?

BMW 8 Series Convertible vs Mercedes S Class: Key differences

BMW 8 Series Convertible

  • barely cheaper
  • noticeably quicker 0–100 km/h
  • moderately lighter
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Mercedes S Class

  • only slightly more power
  • significantly more efficient
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By Achim Sedelmaier

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 barely cheaper – starting at 99,400 £ , while the Mercedes S Class costs 104,000 £ . That’s a price difference of around 4,591 £.

Fuel consumption also shows a difference: the Mercedes S Class uses 2.2 L/100km and is significantly more efficient than the BMW 8 Series Convertible with 6.9 L/100km. The difference is about 4.7 L/100km.

S Class

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 Mercedes S Class offers only slightly more power – delivering 635 HP compared to 625 HP. That’s roughly 10 HP more horsepower.

When accelerating from 0 to 100 km/h, the BMW 8 Series Convertible is noticeably quicker – completing the sprint in 3.3 s, while the Mercedes S Class takes 4 s. That’s about 0.7 s quicker.

There’s also a difference in torque: the Mercedes S Class delivers a bit more torque with 850 Nm compared to 750 Nm. That’s about 100 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: Mercedes S Class offers more seats – 5 vs 4.

In terms of curb weight, BMW 8 Series Convertible is moderately lighter – 1,915 kg compared to 2,165 kg. The difference is around 250 kg.

When it comes to payload, the Mercedes S Class carries markedly more – 660 kg compared to 425 kg. That’s a difference of about 235 kg.

Who wins the race in the data check?

The Mercedes S Class holds a decisive overall lead 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 £104,000
S Class

Mercedes S Class

  • Engine Type : Petrol MHEV, Plugin Hybrid, Diesel MHEV
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive, Rear-Wheel Drive
  • Power HP : 336 - 635 HP
  • Consumption L/100km : 2.2 - 11 L/100km
  • Electric Range : 98 - 118 km
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BMW 8 Series Convertible
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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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Mercedes S Class

The Mercedes S-Class wraps peerless comfort, whisper-quiet luxury and subtle tech wizardry into a chauffeur-ready package that still knows how to engage the driver. It’s the car for buyers who want to arrive relaxed, be taken seriously and occasionally enjoy a grin when the road reminds them this limousine can dance.

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Reviews Mercedes S Class

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BMW 8 Series Convertible
Mercedes S Class

Costs and Consumption
Price
99,400 - 165,800 £
Price
104,000 - 201,400 £
Consumption L/100km
6.9 - 11.2 L/100km
Consumption L/100km
2.2 - 11 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
98 - 118 km
Battery Capacity
-
Battery Capacity
-
co2
180 - 255 g/km
co2
50 - 252 g/km
Fuel tank capacity
66 - 68 L
Fuel tank capacity
-

Dimensions and Body
Body Type
Convertible
Body Type
Sedan
Seats
4
Seats
5
Doors
2
Doors
-
Curb weight
1,915 - 2,125 kg
Curb weight
2,165 - 2,650 kg
Trunk capacity
350 L
Trunk capacity
-
Length
4,851 - 4,867 mm
Length
-
Width
1,902 - 1,907 mm
Width
1,921 mm
Height
1,345 - 1,353 mm
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
340 - 425 kg
Payload
420 - 660 kg

Engine and Performance
Engine Type
Diesel MHEV, Petrol
Engine Type
Petrol MHEV, Plugin Hybrid, Diesel MHEV
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Automatic Gearbox
Drive Type
All-Wheel Drive, Rear-Wheel Drive
Drive Type
All-Wheel Drive, Rear-Wheel Drive
Power HP
333 - 625 HP
Power HP
336 - 635 HP
Acceleration 0-100km/h
3.3 - 5.5 s
Acceleration 0-100km/h
4 - 5.7 s
Max Speed
250 km/h
Max Speed
-
Torque
500 - 750 Nm
Torque
560 - 850 Nm
Number of Cylinders
6 - 8
Number of Cylinders
6 - 8
Power kW
245 - 460 kW
Power kW
247 - 467 kW
Engine capacity
2,993 - 4,395 cm3
Engine capacity
2,989 - 3,982 cm3

General
Model Year
2024
Model Year
2026
CO2 Efficiency Class
G
CO2 Efficiency Class
G, B, F
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.