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Mercedes SL Class vs Porsche 911 Convertible - Differences and prices compared
Compare performance (816 HP vs 711 HP), boot space and price (112700 £ vs 122400 £ ) at a glance. Find out which car is the better choice for you – Mercedes SL Class or Porsche 911 Convertible?
SL Class
Costs and Efficiency:
Looking at overall running costs, both models reveal some interesting differences in everyday economy.
Mercedes SL Class has a barely noticeable advantage in terms of price – it starts at 112700 £ , while the Porsche 911 Convertible costs 122400 £ . That’s a price difference of around 9696 £.
Fuel consumption also shows a difference: Mercedes SL Class manages with 9 L and is therefore a bit more efficient than the Porsche 911 Convertible with 10.30 L. The difference is about 1.30 L per 100 km.
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 has a a bit edge – offering 816 HP compared to 711 HP. That’s roughly 105 HP more horsepower.
In acceleration from 0 to 100 km/h, the Porsche 911 Convertible is to a small extent quicker – completing the sprint in 2.60 s, while the Mercedes SL Class takes 2.90 s. That’s about 0.30 s faster.
In terms of top speed, the Porsche 911 Convertible performs slight better – reaching 322 km/h, while the Mercedes SL Class tops out at 317 km/h. The difference is around 5 km/h.
There’s also a difference in torque: Mercedes SL Class pulls clearly stronger with 1420 Nm compared to 800 Nm. That’s about 620 Nm difference.
SL Class
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 curb weight, Porsche 911 Convertible is barely noticeable lighter – 1655 kg compared to 1810 kg. The difference is around 155 kg.
In terms of boot space, the Mercedes SL Class offers noticeable more room – 240 L compared to 163 L. That’s a difference of about 77 L.
When it comes to payload, Mercedes SL Class slight takes the win – 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 is clearly superior overall 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.
Mercedes SL Class
Porsche 911 Convertible
Costs and Consumption
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Engine and Performance
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Dimensions and Body
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from about £112,700
Mercedes SL Class
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.
details
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.
details
Mercedes SL Class
Porsche 911 Convertible
Costs and Consumption |
|
|---|---|
|
Price
112700 - 219300 £
|
Price
122400 - 244500 £
|
|
Consumption L/100km
9 - 13.6 L
|
Consumption L/100km
10.3 - 11.7 L
|
|
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
70 L
|
Fuel tank capacity
63 L
|
Dimensions and Body |
|
|---|---|
|
Body Type
Roadster
|
Body Type
Convertible
|
|
Seats
4
|
Seats
4
|
|
Doors
2
|
Doors
2
|
|
Curb weight
1810 - 2195 kg
|
Curb weight
1655 - 1900 kg
|
|
Trunk capacity
110 - 240 L
|
Trunk capacity
163 L
|
|
Length
4697 - 4705 mm
|
Length
4542 - 4553 mm
|
|
Width
1915 mm
|
Width
1852 - 1900 mm
|
|
Height
1354 - 1359 mm
|
Height
1292 - 1302 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
260 - 317 km/h
|
Max Speed
291 - 322 km/h
|
|
Torque
480 - 1420 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
1991 - 3982 cm3
|
Engine capacity
2981 - 3591 cm3
|
General |
|
|---|---|
|
Model Year
2025
|
Model Year
2024 - 2026
|
|
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 available as Rear-Wheel Drive or All-Wheel Drive.
The prices shown are estimates based on German list prices, adjusted for local VAT. Local registration taxes (e.g. NoVA, BPM or CO2 malus) are not included. This information is not legally binding.