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Mercedes SL Class vs smart #3 comparison

Compare performance (816 HP vs 272 HP), boot space and price (112,700 £ vs 42,000 £ ) at a glance. Find out which car is the better choice for you – Mercedes SL Class or smart #3?

Mercedes SL Class vs smart #3: Key differences

Mercedes SL Class

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

smart #3

5 (1 Reviews)
rate
  • considerably cheaper
  • considerably more electric range
  • clearly more trunk space
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.

smart #3 is considerably cheaper – starting at 42,000 £ , while the Mercedes SL Class costs 112,700 £ . That’s a price difference of around 70,713 £.

As for electric range, the smart #3 offers considerably more range – reaching up to 455 km, about 443 km more than the Mercedes SL Class.

#3

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 offers clearly more power – delivering 816 HP compared to 272 HP. That’s roughly 544 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes SL Class is substantially quicker – completing the sprint in 2.9 s, while the smart #3 takes 5.8 s. That’s about 2.9 s quicker.

There’s also a difference in torque: the Mercedes SL Class delivers clearly more torque with 1,420 Nm compared to 384 Nm. That’s about 1,036 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.

Seats: smart #3 offers more seats – 5 vs 4.

Both models weigh roughly the same – around 1,810 kg.

Looking at boot space, the smart #3 offers clearly more boot space – 370 L compared to 240 L. That’s a difference of about 130 L.

When it comes to payload, the smart #3 carries moderately more – 450 kg compared to 375 kg. That’s a difference of about 75 kg.

Who wins the race in the data check?

The smart #3 is far ahead 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.

£41,991
#3

smart #3

  • Engine Type Electric
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive
  • Power HP 272 HP
  • Consumption kWh/100km 16.3 kWh/100km
  • Electric Range 455 km
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Frequently compared as well

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Mercedes SL Class
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Mercedes SL Class
smart #3

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

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

smart #3

The Smart #3 turns the brand's cheeky city-car attitude into a grown-up compact SUV, pairing sleek styling with a surprisingly roomy, well-made interior. It's a brilliant pick for buyers who want electric ease without dullness — practical enough for daily life, but still lively enough to make parking and grocery runs feel a little fun.

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smart-hashtag3-brabus-photon-orange-exterior-mallorca1
smart-hashtag3-brabus-photon-orange-exterior-mallorca13
smart-hashtag3-brabus-photon-orange-exterior-mallorca21
smart-hashtag3-brabus-photon-orange-interior-mallorca10
smart-hashtag3-brabus-photon-orange-interior-mallorca3
smart-hashtag3-premium-ceramic-cream-interior-mallorca7

Reviews smart #3

5 (1 Reviews)
rate
Ronny
16 Oct 2025, 13:10:59

Handsome design, packed with advanced driver‑assist technology and stellar performance — all at an attractive price. Highly recommended, this car!

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Mercedes SL Class
smart #3

Costs and Consumption
Price
112,700 - 219,300 £
Price
42,000 £
Consumption L/100km
9 - 13.6 L/100km
Consumption L/100km
-
Consumption kWh/100km
-
Consumption kWh/100km
16.3 kWh/100km
Electric Range
12 km
Electric Range
455 km
Battery Capacity
-
Battery Capacity
-
co2
206 - 309 g/km
co2
0 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
1,810 kg
Trunk capacity
110 - 240 L
Trunk capacity
370 L
Length
-
Length
-
Width
1,915 mm
Width
1,844 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
145 - 375 kg
Payload
450 kg

Engine and Performance
Engine Type
Petrol MHEV, Petrol, Plugin Hybrid
Engine Type
Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Reduction Gearbox
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
435 - 816 HP
Power HP
272 HP
Acceleration 0-100km/h
2.9 - 4.7 s
Acceleration 0-100km/h
5.8 s
Max Speed
-
Max Speed
-
Torque
500 - 1,420 Nm
Torque
384 Nm
Number of Cylinders
4 - 8
Number of Cylinders
-
Power kW
320 - 600 kW
Power kW
200 kW
Engine capacity
1,991 - 3,982 cm3
Engine capacity
-

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
G
CO2 Efficiency Class
A
Brand
Mercedes-Benz
Brand
smart
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.