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Mercedes B Class vs XPeng G9 comparison

Compare performance (238 HP vs 575 HP), boot space and price (33,100 £ vs 51,100 £ ) at a glance. Find out which car is the better choice for you – Mercedes B Class or XPeng G9?

Mercedes B Class vs XPeng G9: Key differences

Mercedes B Class

4.9 (6 Reviews)
rate
  • clearly cheaper
  • significantly lighter
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XPeng G9

4.9 (8 Reviews)
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  • clearly more power
  • clearly quicker 0–100 km/h
  • visibly more trunk space
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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.

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

B Class

Costs and Efficiency:

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

Mercedes B Class is clearly cheaper – starting at 33,100 £ , while the XPeng G9 costs 51,100 £ . That’s a price difference of around 17,956 £.

G9

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 XPeng G9 offers clearly more power – delivering 575 HP compared to 238 HP. That’s roughly 337 HP more horsepower.

When accelerating from 0 to 100 km/h, the XPeng G9 is clearly quicker – completing the sprint in 4.2 s, while the Mercedes B Class takes 6.5 s. That’s about 2.3 s quicker.

There’s also a difference in torque: the XPeng G9 delivers considerably more torque with 695 Nm compared to 400 Nm. That’s about 295 Nm more.

B Class

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 B Class is significantly lighter – 1,405 kg compared to 2,210 kg. The difference is around 805 kg.

Looking at boot space, the XPeng G9 offers visibly more boot space – 660 L compared to 455 L. That’s a difference of about 205 L.

When it comes to payload, the Mercedes B Class carries barely more – 550 kg compared to 520 kg. That’s a difference of about 30 kg.

Who wins the race in the data check?

The XPeng G9 stands well ahead of its rival 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 £51,100
G9

XPeng G9

  • Engine Type Electric
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive, All-Wheel Drive
  • Power HP 351 - 575 HP
  • Consumption kWh/100km 18.4 - 20.1 kWh/100km
  • Electric Range 502 - 585 km
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Frequently compared as well

XPeng G9
ZEEKR 7X
VS
The XPeng G9 and Zeekr 7X are two high-end electric SUVs from Chinese brands that compete on range, tech and comfort while aiming to deliver strong performance. This comparison focuses on real-world range, charging speed, driving dynamics, interior quality and ownership costs to help you decide …
XPeng G6
XPeng G9
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The XPeng G6 and XPeng G9 are two electric SUVs aimed at different buyers: the G6 is a compact, agile, tech-focused crossover, while the G9 is a larger, more premium flagship with greater range and comfort. This comparison highlights the key differences in size, range, performance, interior tech, …
Mercedes B Class
XPeng G9

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes B Class

The Mercedes B-Class is a smart, grown-up compact people carrier that dresses everyday practicality in a near‑premium polish, perfect for buyers who want comfort and a classy badge without the theatrics. It won’t set your pulse racing on a back road, but it will make school runs, commutes and grocery hauls feel pleasantly civilized — a reliable, slightly posh companion for real life.

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Reviews Mercedes B Class

4.9 (6 Reviews)
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SiBa
31 Jul 2026, 14:51:34

We've been driving only the B180D automatic for 9 years — there's nothing better. Great on long trips; the next one will be another B180D automatic.

How do you mainly use this car? (optional): Family car
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Safety
Practicality / Trunk & Everyday Use
Value for Money
Peter
5 Mar 2026, 05:51:19

My wife and I have been driving a Mercedes W247 200d for seven years now, with 93,000 km on the clock. The car is very comfortable even on long trips and economical. At the last service the pads of the electric parking brake were replaced; otherwise no repairs. We love this car.

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

XPeng G9

The XPeng G9 is a spacious, tech-forward electric SUV that pairs a calm, refined ride with responsive performance and a high-quality, minimalist cabin. With strong emphasis on connectivity and advanced driving assistance, it’s a compelling choice if you want modern EV features and generous practicality without a legacy badge.

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Reviews XPeng G9

4.9 (8 Reviews)
rate
Walter
19 Jun 2026, 02:29:05

G9 Performance — currently the best electric car, with outstanding software and driving comfort. It stands up to any comparison with top models from Mercedes, BMW and Audi. Seven-year warranty and automatic updates.

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
Kiano Wotler
29 May 2026, 17:22:07

Very nice smooth riding car

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
Oski
11 May 2026, 19:15:12

I drove the Mercedes EQS and the Xpeng G9 Performance. The Xpeng is an ultra-modern, voice-controlled car with excellent build quality, a superior sound system and air suspension. I now understand why VW invested €700 million to buy a 5% stake in Xpeng. VW cars in China now run on Xpeng technology.

How do you mainly use this car? (optional): Company car / Business
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Rob
1 Jan 2026, 18:43:08

I've seen and driven both cars. The XPeng 9 makes more of an impression. The Zeekr 7x's interior color is limited to black — a real shame! For a nicer contrast you'll have to have it wrapped in a different color. But that's a matter of taste! Otherwise the cars are comparable, noting that the XPeng is a proper SUV while the Zeekr 7x is a crossover.

How do you mainly use this car? (optional): Leisure / Weekend driver
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

Frequently compared as well

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Mercedes B Class
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XPeng G9
XPeng X9
VS
XPeng G9 and XPeng X9 represent two distinct directions in XPeng’s lineup: the G9 is a two-row, tech-rich midsize electric SUV focused on dynamic driving and efficiency, while the X9 is a larger three-row flagship offering more interior space, flexible seating and long-distance comfort. Choosing …
Mercedes A Class
Mercedes B Class
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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 …
XPeng G9
Omoda 9
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The XPeng G9 and Omoda 9 are two electric SUVs that square off on range, tech features and overall value—each targets buyers who want a spacious, high-tech mid‑size EV. This short comparison will focus on their driving feel, interior quality, charging performance and pricing to help you pick the …
BYD Tang
XPeng G9
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BYD Tang and XPeng G9 are two compelling Chinese-built electric SUVs that target buyers looking for space and modern EV tech. The Tang leans toward practical value, strong charging and multi-powertrain options, while the XPeng G9 prioritizes premium refinement, advanced driver assistance and a …
Mercedes B Class
XPeng G9

Costs and Consumption
Price
33,100 - 52,500 £
Price
51,100 - 62,200 £
Consumption L/100km
5.1 - 6.9 L/100km
Consumption L/100km
-
Consumption kWh/100km
-
Consumption kWh/100km
18.4 - 20.1 kWh/100km
Electric Range
-
Electric Range
502 - 585 km
Battery Capacity
-
Battery Capacity
-
co2
133 - 156 g/km
co2
0 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
MPV
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,405 - 1,565 kg
Curb weight
2,210 - 2,395 kg
Trunk capacity
445 - 455 L
Trunk capacity
660 L
Length
-
Length
-
Width
1,796 mm
Width
1,937 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
515 - 550 kg
Payload
515 - 520 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel
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, All-Wheel Drive
Power HP
116 - 238 HP
Power HP
351 - 575 HP
Acceleration 0-100km/h
6.5 - 10 s
Acceleration 0-100km/h
4.2 - 6.6 s
Max Speed
-
Max Speed
-
Torque
200 - 400 Nm
Torque
465 - 695 Nm
Number of Cylinders
4
Number of Cylinders
-
Power kW
85 - 175 kW
Power kW
258 - 423 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
-

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
D, E, F
CO2 Efficiency Class
A
Brand
Mercedes-Benz
Brand
XPeng
What drivetrain options does the Mercedes B Class have?

Available configurations include 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.