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Mercedes A Class vs smart #3 comparison

Compare performance (421 HP vs 272 HP), boot space and price (32,600 £ vs 42,000 £ ) at a glance. Find out which car is the better choice for you – Mercedes A Class or smart #3?

Mercedes A Class vs smart #3: Key differences

Mercedes A Class

2.7 (1 Reviews)
rate
  • noticeably cheaper
  • visibly more power
  • clearly quicker 0–100 km/h
  • clearly lighter
details

smart #3

5 (1 Reviews)
rate
  • clearly more electric range
  • marginally 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

A Class

Costs and Efficiency:

Price and efficiency are often the first things buyers look at. Here it becomes clear which model has the long-term edge – whether at the pump, the plug, or in purchase price.

Mercedes A Class is noticeably cheaper – starting at 32,600 £ , while the smart #3 costs 42,000 £ . That’s a price difference of around 9,423 £.

As for electric range, the smart #3 offers clearly more range – reaching up to 455 km, about 370 km more than the Mercedes A Class.

#3

Engine and Performance:

Power, torque and acceleration say a lot about how a car feels on the road. This is where you see which model delivers more driving dynamics.

When it comes to engine power, the Mercedes A Class offers visibly more power – delivering 421 HP compared to 272 HP. That’s roughly 149 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes A Class is clearly quicker – completing the sprint in 3.9 s, while the smart #3 takes 5.8 s. That’s about 1.9 s quicker.

There’s also a difference in torque: the Mercedes A Class delivers noticeably more torque with 500 Nm compared to 384 Nm. That’s about 116 Nm more.

A 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.

Both vehicles offer seating for 5 people.

In terms of curb weight, Mercedes A Class is clearly lighter – 1,440 kg compared to 1,810 kg. The difference is around 370 kg.

Looking at boot space, the smart #3 offers marginally more boot space – 370 L compared to 350 L. That’s a difference of about 20 L.

When it comes to payload, the Mercedes A Class carries only slightly more – 485 kg compared to 450 kg. That’s a difference of about 35 kg.

Who wins the race in the data check?

The Mercedes A Class is narrowly 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 £32,600
A Class

Mercedes A Class

  • Engine Type : Petrol MHEV, Diesel, Plugin Hybrid, Petrol
  • Transmission : Automatic
  • Drive Type : Front-Wheel Drive, All-Wheel Drive
  • Power HP : 116 - 421 HP
  • Consumption L/100km : 2.3 - 9 L/100km
  • Electric Range : 85 km
details

Frequently compared as well

Mercedes A Class
Mercedes B Class
VS
The Mercedes A‑Class is the sporty, tech‑savvy compact that thrills with sharp handling and a slick cockpit, while the Mercedes B‑Class trades a bit of attitude for towering practicality, roomier seats and a more useful boot. Choose the A‑Class if you want driving fun and style; pick the B‑Class if …
Mercedes A Class
Mercedes GLA
VS
The Mercedes A‑Class is the sharper, more driver-focused hatch that feels nimble and refined on twisty roads, while the Mercedes GLA trades a bit of agility for SUV practicality with a higher ride height, extra luggage space and a commanding view of the road. Pick the A‑Class for sporty handling, …
Mercedes A Class
smart #3

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes A Class

The Mercedes A‑Class arrives as a compact charmer that dresses premium materials and a cockpit full of screens in a tidy, city-friendly package, delivering surprising agility and poise. For buyers who want a luxury badge, clever tech and a car that's equally happy in tight streets or on a spirited country run, the A‑Class offers a grown-up feel with a cheeky streak.

details
18C0292_008
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Reviews Mercedes A Class

2.7 (1 Reviews)
rate

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-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!

Frequently compared as well

smart #3
ZEEKR X
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Mercedes EQA
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smart #3
Volvo EX30
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Mercedes A Class
MINI MINI
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Tesla Model 3
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Mercedes A Class
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Lexus LBX
Mercedes A Class
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In the battle between the Lexus LBX and the Mercedes A-Klasse, luxury meets practicality with distinct finesse. The Lexus LBX, renowned for its plush interiors and hybrid efficiency, presents a compelling alternative for those seeking eco-friendly upscale driving. Meanwhile, the Mercedes A-Klasse …
Mercedes A Class
smart #3

Costs and Consumption
Price
32,600 - 66,500 £
Price
42,000 £
Consumption L/100km
2.3 - 9 L/100km
Consumption L/100km
-
Consumption kWh/100km
-
Consumption kWh/100km
16.3 kWh/100km
Electric Range
85 km
Electric Range
455 km
Battery Capacity
-
Battery Capacity
-
co2
53 - 205 g/km
co2
0 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Hatchback
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,440 - 1,695 kg
Curb weight
1,810 kg
Trunk capacity
310 - 350 L
Trunk capacity
370 L
Length
-
Length
-
Width
1,796 - 1,850 mm
Width
1,844 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
450 - 485 kg
Payload
450 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel, Plugin Hybrid, Petrol
Engine Type
Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Reduction Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
116 - 421 HP
Power HP
272 HP
Acceleration 0-100km/h
3.9 - 9.7 s
Acceleration 0-100km/h
5.8 s
Max Speed
-
Max Speed
-
Torque
200 - 500 Nm
Torque
384 Nm
Number of Cylinders
4
Number of Cylinders
-
Power kW
85 - 310 kW
Power kW
200 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
-

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
D, E, B, G
CO2 Efficiency Class
A
Brand
Mercedes-Benz
Brand
smart
Is the Mercedes A Class offered with different drivetrains?

The Mercedes A Class is offered with Front-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.