2025 Acura RDX vs 2026 Mercedes-Benz GLB

$44,700 · Crossover

$43,800 · Crossover

Comparison Overview

The most significant numerical divergence between the 2025 Acura RDX and the 2026 Mercedes-Benz GLB is in powertrain output, with the RDX delivering 51 more horsepower (272 hp vs. 221 hp) and 22 lb-ft more torque (280 lb-ft vs. 258 lb-ft). This performance deficit in the GLB is counterbalanced by substantial fuel economy gains; the GLB achieves 28 MPG combined compared to the RDX's 23 MPG combined, representing a 5 MPG advantage. Pricing is competitive, with the GLB holding a $900 MSRP advantage at $43,800 versus the RDX's $44,700. However, the RDX features standard all-wheel drive and a 10-speed automatic transmission, while the GLB employs front-wheel drive and an 8-speed automated manual. Dimensionally, the RDX is 5.0 inches longer (187.4 in vs. 182.4 in) but offers significantly more cargo volume at 29.5 cubic feet compared to the GLB's 22.0 cubic feet.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

Choose the Acura RDX if...

Maximizing engine power and torque output (272 hp/280 lb-ft) is a top priority.
Requiring a standard all-wheel drive system for varied road conditions.
Needing the maximum available cargo space of 29.5 cubic feet.

Choose the Mercedes-Benz GLB if...

Achieving the highest possible fuel economy (28 combined MPG) is essential for running costs.
Preferring the brand positioning or design language of the Mercedes-Benz GLB.
Operating primarily in front-wheel drive environments and desiring the lower base MSRP of $43,800.

Key Dimensions

Dimension	Acura RDX	Mercedes-Benz GLB
Length	187.4"	182.4"
Width	74.8"	72.2"
Height	65.7"	66.7"
Wheelbase	108.3"	111.4"

Features Comparison

Safety

Feature	Acura	Mercedes-Benz
Blind Spot Monitor	✓	✓
Lane Departure Warning	✓	—
Lane Keeping Assist System	✓	—
Rear Cross Traffic Alert	✓	—
Pre-Collision Safety System	✓	✓
Post-Collision Safety System	✓	✓
Dual Front Side-Mounted Airbags	✓	✓
Front Head Airbags	✓	✓
Rear Head Airbags	✓	✓
Passenger Airbag Occupant Sensing Deactivation	✓	✓
Electronic Stability Control	✓	✓
Traction Control System	✓	✓
LATCH System	✓	✓
Rear Door Child Safety Locks	✓	✓
Anti-lock Brakes (ABS)	4-Wheel	4-Wheel
Front Ventilated Disc Brakes	✓	✓
Rear Solid Disc Brakes	✓	✓
Brake Assist	✓	✓
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
LED Headlights	✓	✓
Daytime Running Lights	✓	✓
Integrated Turn Signal Mirrors	✓	✓
Front Headrests	2	2
Front Height Adjustable Headrests	✓	✓
Rear Headrests	3	3
Rear Height Adjustable Headrests	✓	✓
Rear Center 3-Point Seatbelt	✓	✓
Anti-Theft Alarm System (Remote)	✓	✓
Engine Immobilizer	✓	✓
Driver Attention Alert	—	✓
Brake Drying	—	✓
Brake Preparation System	—	✓
Headlight Delay-Off	—	✓
Front Fog Lights	—	✓

Engine

Feature	Acura	Mercedes-Benz
Base Engine Displacement	2.0 L	2.0 L
Number of Cylinders	inline 4	inline 4
Base Engine Type	gas	mild hybrid
Horsepower	272 hp @ 6500 rpm	221 hp @ 5500 rpm
Torque	280 lb-ft @ 1600 rpm	258 lb-ft @ 1800 rpm
Number of Valves	16	16
Camshaft Type	Double overhead cam (DOHC)	Double overhead cam (DOHC)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	✓	✓

Drive Train

Feature	Acura	Mercedes-Benz
Transmission Type	10-speed shiftable automatic	8-speed automated manual
Drivetrain Type	all wheel drive	front wheel drive
[object Object]	✓	—
[object Object]	✓	—

Fuel

Feature	Acura	Mercedes-Benz
Fuel Type	premium unleaded (recommended)	premium unleaded (required)
EPA Fuel Economy (City/Highway)	21/27 MPG	25/33 MPG
EPA Fuel Economy (Combined)	23 MPG	28 MPG
EPA Driving Range (City/Highway)	359.1/461.7 mi.	397.5/524.7 mi.
Fuel Tank Capacity	17.1 gal.	15.9 gal.

Comfort & Convenience

Feature	Acura	Mercedes-Benz
Push Button Start	✓	✓
Tilt and Telescopic Steering Wheel	✓	✓
Transmission Controls on Steering Wheel	✓	✓
Cruise Control on Steering Wheel	✓	✓
Audio Controls on Steering Wheel	✓	✓
Electric Power Steering	✓	✓
Rear View Camera	✓	✓
Wireless Charging Pad	✓	—
Adaptive Cruise Control	✓	—
Universal Remote Transmitter	✓	—
Front Cupholders	✓	✓
Rear Cupholders	✓	✓
Front Door Pockets	✓	✓
Rear Door Pockets	✓	✓
Overhead Console with Storage	✓	✓
Front Seatback Storage	✓	✓
Leather Steering Wheel	✓	✓
Dual Zone Climate Control	✓	✓
Rear Ventilation Ducts	✓	✓
Interior Air Filtration	✓	✓
Dual Vanity Mirrors	✓	✓
Auto-Dimming Rearview Mirror	✓	✓
Turn Signal Indicators in Mirrors	✓	✓
Front Parking Sensors	—	✓
Rear Parking Sensors	—	✓
Driver Assisted Parking Assist	—	✓
Cruise Control	—	✓

In Car Entertainment

Feature	Acura	Mercedes-Benz
Infotainment Display	10.2 in	10.25 in
AM/FM Stereo	✓	✓
Speaker System	9	—
Subwoofer Count	1	—
Android Auto (Wireless)	✓	✓
Apple CarPlay (Wireless)	✓	✓
USB Port	✓	✓
Auxiliary Audio Input	✓	—
USB Port with External Media Control	✓	✓
Satellite Radio	✓	✓
Satellite Radio Trial Period	3 months	6 months
Speed Sensitive Volume Control	✓	—

Power Feature

Feature	Acura	Mercedes-Benz
One-Touch Power Windows	4	4
Moonroof Type	1st Row Power Glass	—
Keyless Entry	✓	—
Reverse Tilt Passenger Mirror	✓	—
Heated Mirrors	✓	✓
Remote Keyless Entry	—	✓

Frontseats

Feature	Acura	Mercedes-Benz
Front Head Room	40.0 in.	40.7 in.
Front Leg Room	42.0 in.	41.1 in.
Front Shoulder Room	60.0 in.	55.9 in.
Front Hip Room	55.0 in.	—
Seat Material: Leatherette	✓	✓
Front Seat Type: Bucket	✓	✓
Driver Seat Power Adjustments	8-way	8-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Passenger Seat Power Adjustments	8-way	8-way
Passenger Seat Height Adjustment	✓	✓
Passenger Seat Lumbar Support	Power	Power
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Driver Seat Thigh Extension	—	✓
Driver Seat Memory Settings	—	3
Passenger Seat Thigh Extension	—	✓
Passenger Seat Memory Settings	—	3

Rearseats

Feature	Acura	Mercedes-Benz
Rear Head Room	38.0 in.	39.3 in.
Rear Leg Room	38.0 in.	38.1 in.
Rear Shoulder Room	57.0 in.	54.9 in.
Rear Hip Room	50.0 in.	—
Split-Folding Rear Seatback	✓	✓
Folding Center Armrest	✓	✓
Reclining Rear Seats	—	✓

Tires and Wheels

Feature	Acura	Mercedes-Benz
Wheel Finish	Painted Alloy	—
Wheel Size	19 x 8.0 in	18 x 7.5 in
Tire Type	All Season	—
Tire Size	235/55R19	235/55R18
Spare Tire Type	Temporary	—
Spare Tire Location	Inside Mounted	—
Wheel Material	—	Alloy
Run Flat Tires	—	✓

Suspension

Feature	Acura	Mercedes-Benz
Four-Wheel Independent Suspension	✓	✓
Front Stabilizer Bar	✓	✓
Rear Stabilizer Bar	✓	✓

Warranty

Feature	Acura	Mercedes-Benz
Basic Warranty	4 yr./ 50000 mi.	4 yr./ 50000 mi.
Drivetrain Warranty	6 yr./ 70000 mi.	4 yr./ 50000 mi.
Corrosion/Rust Warranty	5 yr./ unlimited mi.	4 yr./ 50000 mi.
Roadside Assistance	4 yr./ 50000 mi.	4 yr./ 50000 mi.
Complimentary Scheduled Maintenance	1 yr./ 12000 mi.	—
Hybrid Component Warranty	—	6 yr./ 62000 mi.

Frequently Asked Questions

Common questions about comparing the 2025 Acura RDX and 2026 Mercedes-Benz GLB.

How much does the required premium fuel impact the total operating cost difference?

The 2026 Mercedes-Benz GLB's 5 MPG advantage will result in fewer trips to the pump, offsetting the potentially higher cost of premium unleaded fuel required by both models.

Does the RDX's larger size translate to more passenger room?

Based solely on the data provided, the 2025 Acura RDX is 5.0 inches longer, but specific interior passenger volume figures are not available to confirm superior cabin comfort over the 2026 Mercedes-Benz GLB.

What is the difference in transmission architecture between these two crossovers?

The Acura RDX utilizes a 10-speed shiftable automatic transmission, whereas the Mercedes-Benz GLB uses an 8-speed automated manual transmission, suggesting different driving feel characteristics.

Which vehicle has a greater dynamic advantage due to its drivetrain?

The 2025 Acura RDX features standard all-wheel drive, which typically offers greater traction and stability compared to the front-wheel drive standard configuration of the 2026 Mercedes-Benz GLB.

How significant is the MSRP difference if optioning for AWD on the GLB?

The base MSRP gap is $900 in favor of the GLB, but this figure does not account for adding an all-wheel drive option to the GLB, which would narrow or eliminate its initial price advantage over the RDX.