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Mercedes CLA Coupe vs smart #5 comparison

Compare performance (354 HP vs 646 HP), boot space and price (39,600 £ vs 39,300 £ ) at a glance. Find out which car is the better choice for you – Mercedes CLA Coupe or smart #5?

Mercedes CLA Coupe vs smart #5: Key differences

Mercedes CLA Coupe

4.8 (2 Reviews)
rate
  • considerably more efficient
  • markedly more electric range
  • clearly lighter
details

smart #5

4.9 (5 Reviews)
rate
  • barely cheaper
  • significantly more power
  • noticeably quicker 0–100 km/h
  • markedly 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

CLA Coupe

Costs and Efficiency:

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

smart #5 is barely cheaper – starting at 39,300 £ , while the Mercedes CLA Coupe costs 39,600 £ . That’s a price difference of around 294 £.

In terms of energy consumption, the Mercedes CLA Coupe is considerably more efficient: consuming 12.2 kWh/100km compared to 18.4 kWh/100km for the smart #5. That’s a difference of about 6.2 kWh/100km.

As for electric range, the Mercedes CLA Coupe offers markedly more range – reaching up to 791 km, about 201 km more than the smart #5.

#5

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 smart #5 offers significantly more power – delivering 646 HP compared to 354 HP. That’s roughly 292 HP more horsepower.

When accelerating from 0 to 100 km/h, the smart #5 is noticeably quicker – completing the sprint in 3.8 s, while the Mercedes CLA Coupe takes 4.9 s. That’s about 1.1 s quicker.

There’s also a difference in torque: the smart #5 delivers visibly more torque with 710 Nm compared to 515 Nm. That’s about 195 Nm more.

CLA Coupe

Space and Everyday Use:

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

Both vehicles offer seating for 5 people.

In terms of curb weight, Mercedes CLA Coupe is clearly lighter – 1,695 kg compared to 2,200 kg. The difference is around 505 kg.

Looking at boot space, the smart #5 offers markedly more boot space – 630 L compared to 405 L. That’s a difference of about 225 L.

When it comes to payload, the smart #5 carries only slightly more – 502 kg compared to 455 kg. That’s a difference of about 47 kg.

Who wins the race in the data check?

The smart #5 is decisively ahead 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 £39,300
#5

smart #5

  • Engine Type : Electric
  • Transmission : Automatic
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 340 - 646 HP
  • Consumption kWh/100km : 18.4 - 19.9 kWh/100km
  • Electric Range : 465 - 590 km
details

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Mercedes CLA Coupe
smart #5

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes CLA Coupe

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
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Reviews Mercedes CLA Coupe

4.8 (2 Reviews)
rate
marco
12 Mar 2026, 18:44:45

A car with a unique line — the shooting brake finally gets a sporty rear and a roomy trunk.

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
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

smart #5

The Smart #5 continues to build on the brand's legacy of compact and efficient urban vehicles, now infused with a more modern and stylish design. Its sleek appearance is complemented by a spacious interior, offering comfort without compromising its compact nature. This model is ideal for city dwellers seeking a blend of innovation, practicality, and style in their daily drives.

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Reviews smart #5

4.9 (5 Reviews)
rate
Stefan
31 Jan 2026, 22:25:16

I spent a weekend with the Brabus #5 and I’m thrilled! Extremely quiet, even at just under 220 km/h. Very good ride comfort, especially if, like me, you prefer a softer setup for better suspension comfort!
Brutal acceleration that only really hits from about 50 km/h and culminates in a 0–200 km/h sprint in 10.2 seconds… There are almost no cars up to roughly 1,000 hp that are faster!
The actual charging performance is, I believe, the best of any passenger car available in the EU (only Zeekr shows a little more on paper, but probably not in real life) — it charges at peaks up to 425 kW! 10–80% in 13 minutes and 5–100% in 28 minutes.
The fit and finish are in places better than the Mercedes E‑Class...

How do you mainly use this car? (optional): Long-distance driver
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Stefan
4 Dec 2025, 21:11:24

Apart from the hopefully soon improved/reduced chimes and the horrendously hard-to-reach mute for the speed warning, the car is really a knockout!
Very, very quiet, comfortable, extremely fast (Brabus version), great build quality, great equipment!

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Mercedes CLA Coupe
smart #5

Costs and Consumption
Price
39,600 - 59,300 £
Price
39,300 - 52,200 £
Consumption L/100km
4.9 - 5.3 L/100km
Consumption L/100km
-
Consumption kWh/100km
12.2 - 12.6 kWh/100km
Consumption kWh/100km
18.4 - 19.9 kWh/100km
Electric Range
542 - 791 km
Electric Range
465 - 590 km
Battery Capacity
-
Battery Capacity
74.4 - 94 kWh
co2
0 - 120 g/km
co2
0 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Coupe
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
5
Curb weight
1,695 - 2,135 kg
Curb weight
2,200 - 2,378 kg
Trunk capacity
405 L
Trunk capacity
630 L
Length
-
Length
4,695 mm
Width
1,855 mm
Width
1,920 mm
Height
-
Height
1,705 mm
Max trunk capacity
-
Max trunk capacity
1,530 L
Payload
430 - 455 kg
Payload
475 - 502 kg

Engine and Performance
Engine Type
Electric, Petrol MHEV
Engine Type
Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Reduction Gearbox, Dual-Clutch Automatic
Transmission Detail
Reduction Gearbox
Drive Type
Rear-Wheel Drive, All-Wheel Drive, Front-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
156 - 354 HP
Power HP
340 - 646 HP
Acceleration 0-100km/h
4.9 - 8.8 s
Acceleration 0-100km/h
3.8 - 6.9 s
Max Speed
-
Max Speed
200 - 210 km/h
Torque
280 - 515 Nm
Torque
373 - 710 Nm
Number of Cylinders
4
Number of Cylinders
-
Power kW
115 - 260 kW
Power kW
250 - 475 kW
Engine capacity
1,499 cm3
Engine capacity
-

General
Model Year
2,025 - 2,026
Model Year
2025
CO2 Efficiency Class
A, C, D
CO2 Efficiency Class
A
Brand
Mercedes-Benz
Brand
smart
What drivetrain options does the Mercedes CLA Coupe have?

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