@ Lexus / Toyota Motor Corporation
@ Mercedes-Benz Group Media
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Lexus RX vs Mercedes B Class – Performance, range & efficiency compared

Both models have their strengths – but which one suits you more?
Compare performance, efficiency, price and space directly: Lexus RX or Mercedes B Class?

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

RX @ Lexus / Toyota Motor Corporation

Costs and Efficiency:

Looking at overall running costs, both models reveal some interesting differences in everyday economy.

Mercedes B Class has a convincingly advantage in terms of price – it starts at 33100 £, while the Lexus RX costs 63500 £. That’s a price difference of around 30385 £.

Fuel consumption also shows a difference: Lexus RX manages with 1.10 L and is therefore clearly more efficient than the Mercedes B Class with 2.50 L. The difference is about 1.40 L per 100 km.

As for range, the Mercedes B Class performs somewhat better – achieving up to 83 km, about 15 km more than the Lexus RX.

B Class @ Mercedes-Benz Group Media

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 Lexus RX has a distinct edge – offering 371 HP compared to 238 HP. That’s roughly 133 HP more horsepower.

In acceleration from 0 to 100 km/h, the Lexus RX is minimal quicker – completing the sprint in 6.20 s, while the Mercedes B Class takes 6.50 s. That’s about 0.30 s faster.

In terms of top speed, the Mercedes B Class performs slightly better – reaching 250 km/h, while the Lexus RX tops out at 210 km/h. The difference is around 40 km/h.

There’s also a difference in torque: Lexus RX pulls a bit stronger with 551 Nm compared to 450 Nm. That’s about 101 Nm difference.

RX @ Lexus / Toyota Motor Corporation

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 curb weight, Mercedes B Class is clearly lighter – 1405 kg compared to 2040 kg. The difference is around 635 kg.

In terms of boot space, the Lexus RX offers barely noticeable more room – 461 L compared to 455 L. That’s a difference of about 6 L.

In maximum load capacity, the Lexus RX performs minimal better – up to 1678 L, which is about 138 L more than the Mercedes B Class.

When it comes to payload, Lexus RX a bit takes the win – 620 kg compared to 550 kg. That’s a difference of about 70 kg.

Who comes out on top?

Overall, the Lexus RX shows itself to be is largely superior 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 £63,500
RX @ Lexus / Toyota Motor Corporation

Lexus RX

  • Engine Type : Full Hybrid, Plugin Hybrid
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive
  • Power HP : 250 - 371 HP
  • Consumption L/100km : 1.1 - 8 L
  • Electric Range : 68 km

Lexus RX

The Lexus RX glides through city streets with the kind of hushed refinement that turns mundane commutes into a private lounge. It mixes plush comfort and polished practicality in a package that suits buyers who want to arrive relaxed and a touch smug.

details

Mercedes B Class

5 (3)
rate

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.

details
Lexus RX
Mercedes B Class
RX @ Lexus / Toyota Motor Corporation
B Class @ Mercedes-Benz Group Media

Costs and Consumption

Price
63500 - 84700 £
Price
33100 - 52500 £
Consumption L/100km
1.1 - 8 L
Consumption L/100km
2.5 - 6.9 L
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
68 km
Electric Range
83 km
Battery Capacity
-
Battery Capacity
12.90 kWh
co2
25 - 182 g/km
co2
56 - 156 g/km
Fuel tank capacity
55 - 65 L
Fuel tank capacity
35 - 51 L

Dimensions and Body

Body Type
SUV
Body Type
MPV
Seats
5
Seats
5
Doors
5
Doors
5
Curb weight
2040 - 2185 kg
Curb weight
1405 - 1745 kg
Trunk capacity
461 L
Trunk capacity
405 - 455 L
Length
4890 mm
Length
4419 mm
Width
1920 mm
Width
1796 mm
Height
1695 mm
Height
1562 mm
Max trunk capacity
1678 L
Max trunk capacity
1440 - 1540 L
Payload
575 - 620 kg
Payload
505 - 550 kg

Engine and Performance

Engine Type
Full Hybrid, Plugin Hybrid
Engine Type
Plugin Hybrid, Petrol MHEV, Diesel
Transmission
Automatic
Transmission
Automatic
Transmission Detail
CVT, Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
All-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
250 - 371 HP
Power HP
116 - 238 HP
Acceleration 0-100km/h
6.2 - 7.9 s
Acceleration 0-100km/h
6.5 - 10 s
Max Speed
200 - 210 km/h
Max Speed
200 - 250 km/h
Torque
551 Nm
Torque
200 - 450 Nm
Number of Cylinders
4
Number of Cylinders
4
Power kW
184 - 273 kW
Power kW
85 - 175 kW
Engine capacity
2393 - 2487 cm3
Engine capacity
1332 - 1991 cm3

General

Model Year
2023 - 2024
Model Year
2024 - 2025
CO2 Efficiency Class
E, B, G
CO2 Efficiency Class
B, D, E, F
Brand
Lexus
Brand
Mercedes-Benz
Is the Lexus RX offered with different drivetrains?

The Lexus RX is offered with All-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.