@ Alfa Romeo / Stellantis Media
@ Mercedes-Benz Group Media
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Alfa Romeo Giulia vs Mercedes SL Class – Performance, range & efficiency compared

Compare performance, boot capacity, efficiency and price at a glance.
Find out which car is the better choice for you – Alfa Romeo Giulia or Mercedes SL Class?

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

Giulia @ Alfa Romeo / Stellantis Media

Costs and Efficiency:

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

Alfa Romeo Giulia has a decisively advantage in terms of price – it starts at 48000 £, while the Mercedes SL Class costs 112700 £. That’s a price difference of around 64704 £.

Fuel consumption also shows a difference: Alfa Romeo Giulia manages with 5.40 L and is therefore decisively more efficient than the Mercedes SL Class with 9 L. The difference is about 3.60 L per 100 km.

SL Class @ Mercedes-Benz Group Media

Engine and Performance:

Power, torque and acceleration are the classic benchmarks for car enthusiasts – and here, some clear differences start to show.

When it comes to engine power, the Mercedes SL Class has a convincingly edge – offering 816 HP compared to 210 HP. That’s roughly 606 HP more horsepower.

In acceleration from 0 to 100 km/h, the Mercedes SL Class is decisively quicker – completing the sprint in 2.90 s, while the Alfa Romeo Giulia takes 6.80 s. That’s about 3.90 s faster.

In terms of top speed, the Mercedes SL Class performs noticeable better – reaching 317 km/h, while the Alfa Romeo Giulia tops out at 235 km/h. The difference is around 82 km/h.

There’s also a difference in torque: Mercedes SL Class pulls clearly stronger with 1420 Nm compared to 470 Nm. That’s about 950 Nm difference.

Giulia @ Alfa Romeo / Stellantis Media

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: Alfa Romeo Giulia offers somewhat more seating capacity – 5 vs 4.

In curb weight, Alfa Romeo Giulia is to a small extent lighter – 1640 kg compared to 1810 kg. The difference is around 170 kg.

In terms of boot space, the Alfa Romeo Giulia offers significantly more room – 480 L compared to 240 L. That’s a difference of about 240 L.

When it comes to payload, Alfa Romeo Giulia evident takes the win – 535 kg compared to 375 kg. That’s a difference of about 160 kg.

Who comes out on top?

Overall, the Mercedes SL Class shows itself to be is largely superior and secures the title of DriveDuel Champion.
It convinces with the more balanced overall package and proves to be the more versatile choice for everyday use.

from about £112,700
SL Class @ Mercedes-Benz Group Media

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
  • Electric Range : 12 km

Alfa Romeo Giulia

The Alfa Romeo Giulia captivates with its stunning Italian design and dynamic performance, representing a perfect blend of elegance and sportiness. Its engaging driving experience, characterised by precise handling and responsive steering, appeals to enthusiasts who crave the thrill of the road. Inside, the Giulia showcases a beautifully crafted interior that combines luxury with cutting-edge technology, making every journey a delight.

details

Mercedes SL Class

The Mercedes-Benz SL-Class embodies a perfect fusion of performance and luxury, offering a driving experience that is both exhilarating and refined. Its sleek and aerodynamic design ensures a commanding presence on the road, while the sumptuous interior provides unparalleled comfort and cutting-edge technology. With a heritage of engineering excellence, this model stands as a testament to Mercedes-Benz's commitment to innovation and craftsmanship.

details
Alfa Romeo Giulia
Mercedes SL Class
Giulia @ Alfa Romeo / Stellantis Media
SL Class @ Mercedes-Benz Group Media

Costs and Consumption

Price
48000 - 57000 £
Price
112700 - 219300 £
Consumption L/100km
5.40 L
Consumption L/100km
9 - 13.6 L
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
12 km
Battery Capacity
-
Battery Capacity
-
co2
141 g/km
co2
206 - 309 g/km
Fuel tank capacity
58 L
Fuel tank capacity
70 L

Dimensions and Body

Body Type
Sedan
Body Type
Roadster
Seats
5
Seats
4
Doors
4
Doors
2
Curb weight
1640 kg
Curb weight
1810 - 2195 kg
Trunk capacity
480 L
Trunk capacity
110 - 240 L
Length
4650 mm
Length
4697 - 4705 mm
Width
1860 mm
Width
1915 mm
Height
1438 mm
Height
1354 - 1359 mm
Max trunk capacity
-
Max trunk capacity
-
Payload
535 kg
Payload
145 - 375 kg

Engine and Performance

Engine Type
Diesel
Engine Type
Petrol MHEV, Petrol, Plugin Hybrid
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Automatic Gearbox
Drive Type
All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
210 HP
Power HP
381 - 816 HP
Acceleration 0-100km/h
6.80 s
Acceleration 0-100km/h
2.9 - 4.9 s
Max Speed
235 km/h
Max Speed
260 - 317 km/h
Torque
470 Nm
Torque
480 - 1420 Nm
Number of Cylinders
4
Number of Cylinders
4 - 8
Power kW
154 kW
Power kW
280 - 600 kW
Engine capacity
2143 cm3
Engine capacity
1991 - 3982 cm3

General

Model Year
2024 - 2025
Model Year
2025
CO2 Efficiency Class
E
CO2 Efficiency Class
G
Brand
Alfa Romeo
Brand
Mercedes-Benz
Is the Alfa Romeo Giulia offered with different drivetrains?

Available configurations include All-Wheel Drive.

The prices and data displayed are estimates based on German list prices and may vary by country. This information is not legally binding.