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Mercedes S-Class vs MG MG3 comparison

Compare performance (635 HP vs 194 HP), boot space and price (104,000 £ vs 15,400 £ ) at a glance. Find out which car is the better choice for you – Mercedes S-Class or MG MG3?

Mercedes S-Class vs MG MG3: Key differences

Mercedes S-Class

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

MG MG3

5 (1 Reviews)
rate
  • clearly cheaper
  • considerably lighter
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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

S-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.

MG MG3 is clearly cheaper – starting at 15,400 £ , while the Mercedes S-Class costs 104,000 £ . That’s a price difference of around 88,599 £.

Fuel consumption also shows a difference: the Mercedes S-Class uses 2.2 L/100km and is significantly more efficient than the MG MG3 with 4.4 L/100km. The difference is about 2.2 L/100km.

MG3

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 S-Class offers significantly more power – delivering 635 HP compared to 194 HP. That’s roughly 441 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes S-Class is substantially quicker – completing the sprint in 4 s, while the MG MG3 takes 8 s. That’s about 4 s quicker.

There’s also a difference in torque: the Mercedes S-Class delivers considerably more torque with 850 Nm compared to 148 Nm. That’s about 702 Nm more.

S-Class

Space and Everyday Use:

Cabin size, boot volume and payload all play a role in everyday practicality. Here, comfort and flexibility make the difference.

Both vehicles offer seating for 5 people.

In terms of curb weight, MG MG3 is considerably lighter – 1,237 kg compared to 2,165 kg. The difference is around 928 kg.

When it comes to payload, the Mercedes S-Class carries clearly more – 660 kg compared to 448 kg. That’s a difference of about 212 kg.

Who wins the race in the data check?

The Mercedes S-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 £104,000
S-Class

Mercedes S-Class

  • Engine Type : Petrol MHEV, Plugin Hybrid, Diesel MHEV
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive, Rear-Wheel Drive
  • Power HP : 336 - 635 HP
  • Consumption L/100km : 2.2 - 11 L/100km
  • Electric Range : 98 - 118 km
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Mercedes S-Class
MG MG3

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes S-Class

The Mercedes S-Class wraps peerless comfort, whisper-quiet luxury and subtle tech wizardry into a chauffeur-ready package that still knows how to engage the driver. It’s the car for buyers who want to arrive relaxed, be taken seriously and occasionally enjoy a grin when the road reminds them this limousine can dance.

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Reviews Mercedes S-Class

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

MG MG3

The MG3 is a cheeky city hatch that pairs bold, youthful styling with sprightly handling for drivers who want personality on a budget. Its cabin is bright and cleverly packaged, offering sensible space and a fun-to-drive character that turns mundane commutes into something a bit more enjoyable.

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Reviews MG MG3

5 (1 Reviews)
rate
Giorgio catacchio
20 Sept 2025, 00:08:28

I've owned the MG3 Hybrid for a year — I travel a lot, never a dull moment; comes fully loaded as standard, incredible acceleration, etc.

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Mercedes S-Class
MG MG3

Costs and Consumption
Price
104,000 - 201,400 £
Price
15,400 - 21,400 £
Consumption L/100km
2.2 - 11 L/100km
Consumption L/100km
4.4 - 6.1 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
98 - 118 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
50 - 252 g/km
co2
100 - 137 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Sedan
Body Type
Hatchback
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
2,165 - 2,650 kg
Curb weight
1,237 - 1,285 kg
Trunk capacity
-
Trunk capacity
-
Length
-
Length
-
Width
1,921 mm
Width
1,797 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
420 - 660 kg
Payload
373 - 448 kg

Engine and Performance
Engine Type
Petrol MHEV, Plugin Hybrid, Diesel MHEV
Engine Type
Petrol, Full Hybrid
Transmission
Automatic
Transmission
Manuel, Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Manual Gearbox, Automatic Gearbox
Drive Type
All-Wheel Drive, Rear-Wheel Drive
Drive Type
Front-Wheel Drive
Power HP
336 - 635 HP
Power HP
116 - 194 HP
Acceleration 0-100km/h
4 - 5.7 s
Acceleration 0-100km/h
8 - 10.8 s
Max Speed
-
Max Speed
-
Torque
560 - 850 Nm
Torque
148 Nm
Number of Cylinders
6 - 8
Number of Cylinders
4
Power kW
247 - 467 kW
Power kW
85 - 143 kW
Engine capacity
2,989 - 3,982 cm3
Engine capacity
1,490 - 1,495 cm3

General
Model Year
2026
Model Year
2025
CO2 Efficiency Class
G, B, F
CO2 Efficiency Class
E, C
Brand
Mercedes-Benz
Brand
MG
Is the Mercedes S-Class offered with different drivetrains?

The Mercedes S-Class is offered with All-Wheel Drive or Rear-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.