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Mercedes SL Class vs Porsche 911 Convertible comparison

Compare performance (816 HP vs 711 HP), boot space and price (112,700 £ vs 122,400 £ ) at a glance. Find out which car is the better choice for you – Mercedes SL Class or Porsche 911 Convertible?

Mercedes SL Class vs Porsche 911 Convertible: Key differences

Mercedes SL Class

  • barely cheaper
  • somewhat more power
  • a bit more efficient

Porsche 911 Convertible

  • slightly quicker 0–100 km/h
  • very slightly lighter

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

SL Class

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.

Mercedes SL Class is barely cheaper – starting at 112,700 £ , while the Porsche 911 Convertible costs 122,400 £ . That’s a price difference of around 9,696 £.

Fuel consumption also shows a difference: the Mercedes SL Class uses 9 L/100km and is a bit more efficient than the Porsche 911 Convertible with 10.3 L/100km. The difference is about 1.3 L/100km.

SL 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 SL Class offers somewhat more power – delivering 816 HP compared to 711 HP. That’s roughly 105 HP more horsepower.

When accelerating from 0 to 100 km/h, the Porsche 911 Convertible is slightly quicker – completing the sprint in 2.6 s, while the Mercedes SL Class takes 2.9 s. That’s about 0.3 s quicker.

There’s also a difference in torque: the Mercedes SL Class delivers considerably more torque with 1,420 Nm compared to 800 Nm. That’s about 620 Nm more.

SL Class

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.

Both vehicles offer seating for 4 people.

In terms of curb weight, Porsche 911 Convertible is very slightly lighter – 1,655 kg compared to 1,810 kg. The difference is around 155 kg.

When it comes to payload, the Mercedes SL Class carries marginally more – 375 kg compared to 345 kg. That’s a difference of about 30 kg.

Who wins the race in the data check?

The Mercedes SL Class stands well ahead of its rival 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
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Mercedes SL Class
Porsche 911 Convertible

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

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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15C1119_012
15C1119_029
15C1119_120
15C1119_004

Reviews Mercedes SL Class

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Porsche 911 Convertible

The Porsche 911 Cabriolet transforms the iconic silhouette into an open‑air weapon, offering roof-down glamour and razor-sharp handling that still feels perfectly composed on normal roads. It’s the kind of car that serves daily duties with surprising ease while delivering intoxicating engine music and a grin factor that makes every trip feel like a small victory.

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Reviews Porsche 911 Convertible

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Mercedes SL Class
Porsche 911 Convertible

Costs and Consumption
Price
112,700 - 219,300 £
Price
122,400 - 244,500 £
Consumption L/100km
9 - 13.6 L/100km
Consumption L/100km
10.3 - 11.7 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
12 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
206 - 309 g/km
co2
234 - 265 g/km
Fuel tank capacity
-
Fuel tank capacity
63 L

Dimensions and Body
Body Type
Roadster
Body Type
Convertible
Seats
4
Seats
4
Doors
-
Doors
2
Curb weight
1,810 - 2,195 kg
Curb weight
1,655 - 1,900 kg
Trunk capacity
-
Trunk capacity
163 L
Length
-
Length
4,542 - 4,553 mm
Width
1,915 mm
Width
1,852 - 1,900 mm
Height
-
Height
1,292 - 1,298 mm
Max trunk capacity
-
Max trunk capacity
-
Payload
145 - 375 kg
Payload
275 - 345 kg

Engine and Performance
Engine Type
Petrol MHEV, Petrol, Plugin Hybrid
Engine Type
Petrol, Full Hybrid
Transmission
Automatic
Transmission
Automatic, Manuel
Transmission Detail
Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic, Manual Gearbox
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
381 - 816 HP
Power HP
394 - 711 HP
Acceleration 0-100km/h
2.9 - 4.9 s
Acceleration 0-100km/h
2.6 - 4.7 s
Max Speed
-
Max Speed
291 - 312 km/h
Torque
480 - 1,420 Nm
Torque
450 - 800 Nm
Number of Cylinders
4 - 8
Number of Cylinders
6
Power kW
280 - 600 kW
Power kW
290 - 523 kW
Engine capacity
1,991 - 3,982 cm3
Engine capacity
2,981 - 3,591 cm3

General
Model Year
2,025
Model Year
2,024 - 2,026
CO2 Efficiency Class
G
CO2 Efficiency Class
G
Brand
Mercedes-Benz
Brand
Porsche
What drive types are available for the Mercedes SL Class?

The Mercedes SL Class is offered with Rear-Wheel Drive or All-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.