2025 Acura RDX vs 2025 Mercedes-Benz GLB-Class
Comparison Overview
Fuel economy represents the most substantial quantifiable disparity between the 2025 Acura RDX and the 2025 Mercedes-Benz GLB-Class, with the GLB-Class achieving 5 MPG higher in combined driving (28 MPG versus RDX's 23 MPG). Power output is also significantly divergent: the RDX delivers 272 horsepower, eclipsing the GLB-Class's 221 horsepower by a margin of 51 hp. Pricing shows minimal variation, with the RDX starting at $44,700 and the GLB-Class at $45,800. Dimensional analysis reveals the RDX is 5.0 inches longer (187.4 inches vs. 182.4 inches) but the GLB-Class is 1.0 inch taller. The RDX employs a 10-speed automatic transmission paired with standard AWD, contrasting with the GLB-Class's 8-speed automated manual and standard FWD configuration. Cargo capacity favors the RDX by 7.5 cubic feet (29.5 cu ft vs. 22 cu ft).
Size Comparison
Performance
Fuel Efficiency
Full Specifications
Our Verdicts
2025 Mercedes-Benz GLB-Class
The 2025 Mercedes-Benz GLB-Class secures the commuter advantage due to its superior 28 MPG combined fuel rating, providing lower operational costs.
2025 Acura RDX
The 2025 Acura RDX offers 29.5 cu ft of cargo space, substantially larger than the GLB-Class's 22 cu ft, improving practicality for family gear.
2025 Acura RDX
The 2025 Acura RDX is objectively superior for performance metrics, generating 272 hp and 280 lb-ft of torque compared to the GLB-Class's lower outputs.
2025 Acura RDX
The 2025 Acura RDX offers 51 more horsepower and 7.5 more cubic feet of cargo capacity while possessing a lower initial MSRP ($44,700 vs. $45,800).
Choose the Acura RDX if...
- Maximum horsepower output (272 hp) is a primary purchasing driver.
- Greater overall storage space, evidenced by 29.5 cu ft of cargo room, is required.
- Standard all-wheel drive capability is preferred over front-wheel drive.
Choose the Mercedes-Benz GLB-Class if...
- Achieving 28 MPG combined efficiency is critical for minimizing fuel expenses.
- The driver prioritizes a higher roofline (66.7 inches) for potential headroom.
- Front-wheel drive configuration and an 8-speed automated manual transmission are acceptable.
Key Dimensions
| Dimension | Acura RDX | Mercedes-Benz GLB-Class |
|---|---|---|
| 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 | ✓ | ✓ |
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. | — |
Frequently Asked Questions
Common questions about comparing the 2025 Acura RDX and 2025 Mercedes-Benz GLB-Class.
How much more power does the RDX provide over the GLB-Class?
The 2025 Acura RDX produces 272 horsepower, which is exactly 51 horsepower more than the 2025 Mercedes-Benz GLB-Class's 221 horsepower rating.
Which crossover is more fuel efficient for highway travel?
The 2025 Mercedes-Benz GLB-Class has a clear advantage, achieving 33 MPG on the highway compared to the 2025 Acura RDX's 27 MPG highway rating.
Is there a significant difference in base pricing between these models?
Yes, the 2025 Acura RDX has a lower starting MSRP at $44,700, while the 2025 Mercedes-Benz GLB-Class begins at $45,800.
Which vehicle offers superior cargo capacity for utility?
The 2025 Acura RDX provides 29.5 cubic feet of cargo volume, exceeding the 22 cubic feet offered by the 2025 Mercedes-Benz GLB-Class.
Do these vehicles require the same fuel grade?
The 2025 Acura RDX recommends premium unleaded fuel, whereas the 2025 Mercedes-Benz GLB-Class mandates the use of premium unleaded fuel.
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