2026 Acura RDX vs 2026 Mercedes-Benz GLB
Comparison Overview
The 2026 Acura RDX charges into the comparison with palpable excitement, boasting a muscular 272 hp and 280 lb-ft of torque delivered through an eager 10-speed automatic transmission and standard all-wheel drive. This precision machine, though slightly larger at 187.4 inches long, prioritizes engagement over austerity. Conversely, the 2026 Mercedes-Benz GLB seduces with efficiency and metropolitan grace; it starts at a lower $43,800 MSRP and achieves an impressive 28 MPG combined, a full 5 MPG better than the RDX's 23 MPG combined. However, the GLB makes you work for the drive, producing only 221 hp from its front-wheel-drive platform, making the RDX the clear powerhouse choice. For utility, the RDX offers 29.5 cu ft of cargo space compared to the GLB's 22 cu ft, painting a picture of two sharply contrasted compact luxury crossovers.
Size Comparison
Performance
Fuel Efficiency
Full Specifications
Our Verdicts
2026 Mercedes-Benz GLB
With a superior 28 MPG combined and a lower entry price point, the GLB is the more frugal daily runner.
2026 Acura RDX
The RDX provides significantly more utility with 29.5 cu ft of cargo capacity versus the GLB's 22 cu ft.
2026 Acura RDX
The RDX offers a decisive 51 hp advantage (272 hp vs 221 hp) and standard all-wheel drive for spirited driving.
2026 Acura RDX
Despite a higher initial price, the RDX delivers significantly higher performance metrics and greater cargo volume.
Choose the Acura RDX if...
- Maximum engine output (272 hp) is a non-negotiable part of the driving experience.
- Year-round confident traction is needed via the standard all-wheel drive system.
- Buyers require ample storage, appreciating the RDX's 29.5 cu ft of cargo space.
Choose the Mercedes-Benz GLB if...
- Fuel economy is paramount, evidenced by the GLB's superior 5 MPG combined advantage.
- Drivers prefer a slightly smaller footprint, as the GLB is 5 inches shorter in length.
- A lower base price ($43,800) fits better within strict initial budget constraints.
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 | ✓ | ✓ |
| 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 | ✓ | ✓ |
| 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 2026 Acura RDX and 2026 Mercedes-Benz GLB.
How significant is the power deficit in the Mercedes-Benz GLB compared to the Acura RDX?
The difference is substantial; the RDX produces 272 hp, giving it a 51 hp advantage over the GLB's 221 hp output, which buyers will certainly feel during acceleration.
Does the required premium fuel for the GLB negate its better MPG ratings?
Both vehicles recommend or require premium unleaded fuel, meaning fuel cost per gallon is similar, but the GLB's 28 MPG combined rating means fewer trips to the pump overall.
Which crossover is physically smaller for easier city parking?
The 2026 Mercedes-Benz GLB is the more compact option, measuring 182.4 inches in length compared to the RDX's 187.4 inches.
What does the RDX's 10-speed transmission offer over the GLB's 8-speed?
The RDX's 10-speed shiftable automatic generally promises smoother gear changes and potentially better optimization for its higher power output than the GLB's 8-speed automated manual.
If I plan on hauling a lot of gear, which crossover provides more utility?
The 2026 Acura RDX clearly leads in utility, offering 29.5 cu ft of cargo room versus the 22 cu ft available in the Mercedes-Benz GLB.
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