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Mercedes SL Class vs Peugeot 408 comparison

Compare performance (816 HP vs 240 HP), boot space and price (112,700 £ vs 35,100 £ ) at a glance. Find out which car is the better choice for you – Mercedes SL Class or Peugeot 408?

Mercedes SL Class vs Peugeot 408: Key differences

Mercedes SL Class

  • clearly more power
  • significantly quicker 0–100 km/h
details

Peugeot 408

4.9 (1 Reviews)
rate
  • considerably cheaper
  • substantially more efficient
  • considerably more electric range
  • slightly lighter
details

All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.

By Achim Sedelmaier

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

SL Class

Costs and Efficiency:

Price and efficiency are key factors when choosing a car – and this is often where the real differences emerge.

Peugeot 408 is considerably cheaper – starting at 35,100 £ , while the Mercedes SL Class costs 112,700 £ . That’s a price difference of around 77,587 £.

Fuel consumption also shows a difference: the Peugeot 408 uses 2.6 L/100km and is substantially more efficient than the Mercedes SL Class with 9 L/100km. The difference is about 6.4 L/100km.

As for electric range, the Peugeot 408 offers considerably more range – reaching up to 456 km, about 444 km more than the Mercedes SL Class.

408

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 clearly more power – delivering 816 HP compared to 240 HP. That’s roughly 576 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes SL Class is significantly quicker – completing the sprint in 2.9 s, while the Peugeot 408 takes 7.2 s. That’s about 4.3 s quicker.

There’s also a difference in torque: the Mercedes SL Class delivers considerably more torque with 1,420 Nm compared to 360 Nm. That’s about 1,060 Nm more.

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.

Seats: Peugeot 408 offers more seats – 5 vs 4.

In terms of curb weight, Peugeot 408 is slightly lighter – 1,544 kg compared to 1,810 kg. The difference is around 266 kg.

When it comes to payload, the Peugeot 408 carries slightly more – 456 kg compared to 375 kg. That’s a difference of about 81 kg.

Who wins the race in the data check?

The Peugeot 408 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 £35,100
408

Peugeot 408

  • Engine Type : Petrol MHEV, Plugin Hybrid, Electric
  • Transmission : Automatic
  • Drive Type : Front-Wheel Drive
  • Power HP : 145 - 240 HP
  • Consumption L/100km : 2.6 - 5 L/100km
  • Consumption kWh/100km : 14.7 kWh/100km
  • Electric Range : 79 - 456 km
details

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Mercedes SL Class
Peugeot 408

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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Reviews Mercedes SL Class

No reviews yet. Share your experience and help others decide.

Peugeot 408

The Peugeot 408 blends a coupe-like roofline with practical sensibility, delivering striking looks and a surprisingly airy, premium-feeling cabin. On the road it prefers comfort and poise over manic thrills, making it a smart, stylish choice for buyers who want something a bit different from the usual family hatchback.

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Reviews Peugeot 408

4.9 (1 Reviews)
rate
Klaudia
15 Jan 2026, 19:46:29

This is one of the most beautiful cars of our time, in an era when every brand churns out cookie‑cutter models — as long as they look like an SUV. It's comfortable, incredibly spacious, picks up nicely on the road and always makes a great impression everywhere ;)

How do you mainly use this car? (optional): Family car
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

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Mercedes SL Class
Peugeot 408

Costs and Consumption
Price
112,700 - 219,300 £
Price
35,100 - 48,000 £
Consumption L/100km
9 - 13.6 L/100km
Consumption L/100km
2.6 - 5 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
14.7 kWh/100km
Electric Range
12 km
Electric Range
79 - 456 km
Battery Capacity
-
Battery Capacity
-
co2
206 - 309 g/km
co2
0 - 114 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Roadster
Body Type
SUV
Seats
4
Seats
5
Doors
-
Doors
-
Curb weight
1,810 - 2,195 kg
Curb weight
1,544 - 1,879 kg
Trunk capacity
-
Trunk capacity
-
Length
-
Length
-
Width
1,915 mm
Width
1,848 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
145 - 375 kg
Payload
371 - 456 kg

Engine and Performance
Engine Type
Petrol MHEV, Petrol, Plugin Hybrid
Engine Type
Petrol MHEV, Plugin Hybrid, Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic, Reduction Gearbox
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
Front-Wheel Drive
Power HP
381 - 816 HP
Power HP
145 - 240 HP
Acceleration 0-100km/h
2.9 - 4.9 s
Acceleration 0-100km/h
7.2 - 9.4 s
Max Speed
-
Max Speed
-
Torque
480 - 1,420 Nm
Torque
230 - 360 Nm
Number of Cylinders
4 - 8
Number of Cylinders
3 - 4
Power kW
280 - 600 kW
Power kW
107 - 176 kW
Engine capacity
1,991 - 3,982 cm3
Engine capacity
1,199 - 1,598 cm3

General
Model Year
2025
Model Year
2026
CO2 Efficiency Class
G
CO2 Efficiency Class
C, B, A
Brand
Mercedes-Benz
Brand
Peugeot
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.