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Mercedes CLA Coupe vs smart #3 - Differences and prices compared

Compare performance (421 HP vs 428 HP), boot space and price (37100 £ vs 34700 £) at a glance. Find out which car is the better choice for you – Mercedes CLA Coupe or smart #3?

Mercedes CLA Coupe

4.9 (1 Reviews)
rate

smart #3

5 (1 Reviews)
rate

You can find all user reviews further down on this page.

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

CLA Coupe @ Mercedes-Benz Group Media

Costs and Efficiency:

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

smart #3 has a minimal advantage in terms of price – it starts at 34700 £, while the Mercedes CLA Coupe costs 37100 £. That’s a price difference of around 2397 £.

In terms of energy consumption, the advantage goes to the Mercedes CLA Coupe: with 12.20 kWh per 100 km, it’s noticeable more efficient than the smart #3 with 16.30 kWh. That’s a difference of about 4.10 kWh.

As for range, the Mercedes CLA Coupe performs convincingly better – achieving up to 791 km, about 336 km more than the smart #3.

#3 @ smart Europe GmbH

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 smart #3 has a barely noticeable edge – offering 428 HP compared to 421 HP. That’s roughly 7 HP more horsepower.

In acceleration from 0 to 100 km/h, the smart #3 is somewhat quicker – completing the sprint in 3.70 s, while the Mercedes CLA Coupe takes 4.10 s. That’s about 0.40 s faster.

In terms of top speed, the Mercedes CLA Coupe performs noticeable better – reaching 270 km/h, while the smart #3 tops out at 180 km/h. The difference is around 90 km/h.

There’s also a difference in torque: smart #3 pulls somewhat stronger with 584 Nm compared to 515 Nm. That’s about 69 Nm difference.

CLA Coupe @ Mercedes-Benz Group Media

Space and Everyday Use:

Whether family car or daily driver – which one offers more room, flexibility and comfort?

Seats: offers more seating capacity – vs .

In curb weight, Mercedes CLA Coupe is to a small extent lighter – 1505 kg compared to 1780 kg. The difference is around 275 kg.

In terms of boot space, the Mercedes CLA Coupe offers a bit more room – 460 L compared to 370 L. That’s a difference of about 90 L.

When it comes to payload, Mercedes CLA Coupe slight takes the win – 490 kg compared to 450 kg. That’s a difference of about 40 kg.

Who comes out on top?

Overall, the Mercedes CLA Coupe shows itself to be dominates this comparison 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 £37,100
CLA Coupe @ Mercedes-Benz Group Media

Mercedes CLA Coupe

  • Engine Type : Plugin Hybrid, Petrol MHEV, Diesel, Petrol, Electric
  • Transmission : Automatic
  • Drive Type : Front-Wheel Drive, All-Wheel Drive, Rear-Wheel Drive
  • Power HP : 116 - 421 HP
  • Consumption L/100km : 2.3 - 8.9 L
  • Consumption kWh/100km : 12.2 - 12.6 kWh
  • Electric Range : 86 - 791 km
details
Mercedes CLA Coupe
smart #3

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes CLA Coupe

4.9 (1 Reviews)
rate

The Mercedes CLA Coupe cuts a rakish silhouette that blends sporty coupe lines with everyday practicality, giving style-minded buyers a premium image without shouting. Inside it feels more luxurious than its size suggests, with a slick cabin, intuitive tech and a composed ride — the kind of car that parties in the city and still shows up polished on Sunday morning.

details
19C0225_069 @ Mercedes-Benz Group Media
19C0225_068 @ Mercedes-Benz Group Media
19C0225_067 @ Mercedes-Benz Group Media
19C0225_044 @ Mercedes-Benz Group Media

smart #3

5 (1 Reviews)
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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.

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

Reviews Mercedes CLA Coupe

4.9 (1 Reviews)
rate
Dejf
18 Dec 2025, 14:59:40

Nice efficient car. Like it

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

Reviews smart #3

5 (1 Reviews)
rate

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#3 @ smart Europe GmbH

Costs and Consumption
Price
37100 - 73700 £
Price
34700 - 45800 £
Consumption L/100km
2.3 - 8.9 L
Consumption L/100km
-
Consumption kWh/100km
12.2 - 12.6 kWh
Consumption kWh/100km
16.3 - 17.6 kWh
Electric Range
86 - 791 km
Electric Range
325 - 455 km
Battery Capacity
12.9 - 85 kWh
Battery Capacity
47 - 62 kWh
co2
0 - 202 g/km
co2
0 g/km
Fuel tank capacity
35 - 51 L
Fuel tank capacity
-

Dimensions and Body
Body Type
Coupe
Body Type
SUV
Seats
5
Seats
5
Doors
4
Doors
5
Curb weight
1505 - 2135 kg
Curb weight
1780 - 1910 kg
Trunk capacity
395 - 460 L
Trunk capacity
370 L
Length
4692 - 4723 mm
Length
4400 mm
Width
1834 - 1857 mm
Width
1844 mm
Height
1404 - 1468 mm
Height
1556 mm
Max trunk capacity
-
Max trunk capacity
1160 L
Payload
440 - 490 kg
Payload
419 - 450 kg

Engine and Performance
Engine Type
Plugin Hybrid, Petrol MHEV, Diesel, Petrol, Electric
Engine Type
Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic, Reduction Gearbox
Transmission Detail
Reduction Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive, Rear-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
116 - 421 HP
Power HP
272 - 428 HP
Acceleration 0-100km/h
4.1 - 10 s
Acceleration 0-100km/h
3.7 - 5.8 s
Max Speed
205 - 270 km/h
Max Speed
180 km/h
Torque
230 - 515 Nm
Torque
343 - 584 Nm
Number of Cylinders
4
Number of Cylinders
-
Power kW
85 - 310 kW
Power kW
200 - 315 kW
Engine capacity
1332 - 1991 cm3
Engine capacity
-

General
Model Year
2024 - 2025
Model Year
2023 - 2025
CO2 Efficiency Class
B, D, E, G, A
CO2 Efficiency Class
A
Brand
Mercedes-Benz
Brand
smart

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What drive types are available for the Mercedes CLA Coupe?

The Mercedes CLA Coupe is available as Front-Wheel Drive, All-Wheel Drive or Rear-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.