2025 Alfa Romeo Stelvio vs 2026 Mercedes-Benz GLB
Comparison Overview
The most significant numerical disparity between the 2025 Alfa Romeo Stelvio and the 2026 Mercedes-Benz GLB is the $5,195 difference in their Manufacturer's Suggested Retail Price (MSRP), with the GLB starting at $43,800 against the Stelvio's $48,995. Power output favors the Alfa Romeo significantly, delivering 280 hp and 306 lb-ft of torque, a substantial 59 hp surplus over the GLB's 221 hp and 258 lb-ft of torque. Fuel efficiency shows a 4 MPG combined advantage for the Mercedes, achieving 28 MPG combined (25 city/33 highway) versus the Stelvio's 24 MPG combined (22 city/28 highway). In physical footprint, the Stelvio is longer at 184.6 inches compared to 182.4 inches, yet the GLB offers greater utility with 22 cubic feet of cargo capacity, significantly eclipsing the Stelvio's 18.5 cu ft. Both require premium unleaded fuel, but the GLB employs a front-wheel-drive base configuration while the Stelvio includes standard all-wheel drive.
Size Comparison
Performance
Fuel Efficiency
Full Specifications
Our Verdicts
2026 Mercedes-Benz GLB
GLB wins on efficiency, achieving 28 combined MPG, which reduces operating costs over time.
2026 Mercedes-Benz GLB
The GLB offers superior cargo volume, providing 22 cu ft versus the Stelvio's 18.5 cu ft.
2025 Alfa Romeo Stelvio
Stelvio provides a substantial performance edge with 280 hp and standard all-wheel drive.
2026 Mercedes-Benz GLB
GLB commands a $5,195 lower starting price while providing better fuel economy.
Choose the Alfa Romeo Stelvio if...
- A higher focus on immediate acceleration and engine output (280 hp) is paramount.
- Standard all-wheel drive traction is a non-negotiable requirement for driving conditions.
- The buyer prioritizes a more aggressive exterior dimension set (184.6 inches in length).
Choose the Mercedes-Benz GLB if...
- Maximizing cargo space, prioritizing 22 cu ft over 18.5 cu ft, is essential.
- Lower running costs derived from better fuel economy (28 combined MPG) are desired.
- A lower initial purchase price, saving $5,195, dictates the buying decision.
Key Dimensions
| Dimension | Alfa Romeo Stelvio | Mercedes-Benz GLB |
|---|---|---|
| Length | 184.6" | 182.4" |
| Width | 74.9" | 72.2" |
| Height | 66.0" | 66.7" |
| Wheelbase | 111.0" | 111.4" |
Features Comparison
Safety
| Feature | Alfa Romeo | Mercedes-Benz |
|---|---|---|
| Blind Spot Monitor | ✓ | ✓ |
| Lane Departure Warning | ✓ | — |
| Lane Keeping Assist System | ✓ | — |
| Rear Cross Traffic Alert | ✓ | — |
| Driver Attention Alert | ✓ | ✓ |
| Pre-Collision Safety System | ✓ | ✓ |
| Dual Front Side-Mounted Airbags | ✓ | ✓ |
| Front Head Airbags | ✓ | ✓ |
| Rear Head Airbags | ✓ | ✓ |
| 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 | ✓ | ✓ |
| Adaptive Headlights | ✓ | — |
| Self-Leveling Headlights | ✓ | — |
| Daytime Running Lights | ✓ | ✓ |
| Headlight Washers | ✓ | — |
| Integrated Turn Signal Mirrors | ✓ | ✓ |
| Front Headrests | 2 | 2 |
| Front Height Adjustable Headrests | ✓ | ✓ |
| Rear Headrests | 3 | 3 |
| Rear Center 3-Point Seatbelt | ✓ | ✓ |
| Anti-Theft Alarm System (Remote) | ✓ | ✓ |
| Engine Immobilizer | ✓ | ✓ |
| Post-Collision Safety System | — | ✓ |
| Passenger Airbag Occupant Sensing Deactivation | — | ✓ |
| Brake Drying | — | ✓ |
| Brake Preparation System | — | ✓ |
| Headlight Delay-Off | — | ✓ |
| Front Fog Lights | — | ✓ |
| Rear Height Adjustable Headrests | — | ✓ |
Engine
| Feature | Alfa Romeo | 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 | 280 hp @ 5200 rpm | 221 hp @ 5500 rpm |
| Torque | 306 lb-ft @ 2000 rpm | 258 lb-ft @ 1800 rpm |
| Number of Valves | 16 | 16 |
| Camshaft Type | Single overhead cam (SOHC) | Double overhead cam (DOHC) |
| Variable Valve Timing | Variable | Variable |
| Fuel Injection Type | ✓ | ✓ |
Drive Train
| Feature | Alfa Romeo | Mercedes-Benz |
|---|---|---|
| Transmission Type | 8-speed shiftable automatic | 8-speed automated manual |
| Drivetrain Type | all wheel drive | front wheel drive |
| Hill Descent Control | ✓ | — |
Fuel
| Feature | Alfa Romeo | Mercedes-Benz |
|---|---|---|
| Fuel Type | premium unleaded (required) | premium unleaded (required) |
| EPA Fuel Economy (City/Highway) | 22/28 MPG | 25/33 MPG |
| EPA Fuel Economy (Combined) | 24 MPG | 28 MPG |
| EPA Driving Range (City/Highway) | 371.8/473.2 mi. | 397.5/524.7 mi. |
| Fuel Tank Capacity | 16.9 gal. | 15.9 gal. |
Comfort & Convenience
| Feature | Alfa Romeo | 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 | ✓ | ✓ |
| Front Parking Sensors | ✓ | ✓ |
| Rear Parking Sensors | ✓ | ✓ |
| Wireless Charging Pad | ✓ | — |
| Adaptive Cruise Control | ✓ | — |
| Universal Remote Transmitter | ✓ | — |
| Front Cupholders | ✓ | ✓ |
| Rear Cupholders | ✓ | ✓ |
| Front Door Pockets | ✓ | ✓ |
| Rear Door Pockets | ✓ | ✓ |
| Front Seatback Storage | ✓ | ✓ |
| Leather Steering Wheel | ✓ | ✓ |
| Simulated Alloy Trim on Steering Wheel | ✓ | — |
| Heated Steering Wheel | ✓ | — |
| Dual Zone Climate Control | ✓ | ✓ |
| Rear Ventilation Ducts | ✓ | ✓ |
| Interior Air Filtration | ✓ | ✓ |
| Dual Vanity Mirrors | ✓ | ✓ |
| Auto-Dimming Rearview Mirror | ✓ | ✓ |
| Turn Signal Indicators in Mirrors | ✓ | ✓ |
| Driver Assisted Parking Assist | — | ✓ |
| Cruise Control | — | ✓ |
| Overhead Console with Storage | — | ✓ |
In Car Entertainment
| Feature | Alfa Romeo | Mercedes-Benz |
|---|---|---|
| Infotainment Display | 8.8 in | 10.25 in |
| AM/FM Stereo | ✓ | ✓ |
| Speaker System | 8 | — |
| Android Auto (Wired) | ✓ | — |
| Apple CarPlay (Wired) | ✓ | — |
| USB Port | ✓ | ✓ |
| Auxiliary Audio Input | ✓ | — |
| USB Port with External Media Control | ✓ | ✓ |
| Satellite Radio | ✓ | ✓ |
| Satellite Radio Trial Period | 6 months | 6 months |
| Android Auto (Wireless) | — | ✓ |
| Apple CarPlay (Wireless) | — | ✓ |
Power Feature
| Feature | Alfa Romeo | Mercedes-Benz |
|---|---|---|
| One-Touch Power Windows | 4 | 4 |
| Keyless Entry | ✓ | — |
| Heated Mirrors | ✓ | ✓ |
| Remote Keyless Entry | — | ✓ |
Frontseats
| Feature | Alfa Romeo | Mercedes-Benz |
|---|---|---|
| Front Head Room | 40.2 in. | 40.7 in. |
| Front Leg Room | 36.6 in. | 41.1 in. |
| Front Shoulder Room | 57.5 in. | 55.9 in. |
| Seat Material: Leather | ✓ | — |
| Front Seat Type: Bucket | ✓ | ✓ |
| Driver Seat Power Adjustments | 8-way | 8-way |
| Driver Seat Height Adjustment | ✓ | ✓ |
| Driver Seat Lumbar Support | Power | Power |
| Driver Seat Memory Settings | 3 | 3 |
| Passenger Seat Power Adjustments | 6-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 |
| Seat Material: Leatherette | — | ✓ |
| Driver Seat Thigh Extension | — | ✓ |
| Passenger Seat Thigh Extension | — | ✓ |
| Passenger Seat Memory Settings | — | 3 |
Rearseats
| Feature | Alfa Romeo | Mercedes-Benz |
|---|---|---|
| Rear Head Room | 38.9 in. | 39.3 in. |
| Rear Leg Room | 31.9 in. | 38.1 in. |
| Rear Shoulder Room | 56.0 in. | 54.9 in. |
| Split-Folding Rear Seatback | ✓ | ✓ |
| Heated Rear Seats (Multi-Level) | ✓ | — |
| Reclining Rear Seats | — | ✓ |
| Folding Center Armrest | — | ✓ |
Tires and Wheels
| Feature | Alfa Romeo | Mercedes-Benz |
|---|---|---|
| Wheel Material | Alloy | Alloy |
| Wheel Size | 19 x 8.0 in | 18 x 7.5 in |
| Tire Type | All Season | — |
| Tire Size | 235/55R19 | 235/55R18 |
| Run Flat Tires | — | ✓ |
Suspension
| Feature | Alfa Romeo | Mercedes-Benz |
|---|---|---|
| Four-Wheel Independent Suspension | ✓ | ✓ |
| Front Stabilizer Bar | — | ✓ |
| Rear Stabilizer Bar | — | ✓ |
Warranty
| Feature | Alfa Romeo | Mercedes-Benz |
|---|---|---|
| Basic Warranty | 4 yr./ 50000 mi. | 4 yr./ 50000 mi. |
| Drivetrain Warranty | 4 yr./ 50000 mi. | 4 yr./ 50000 mi. |
| Corrosion/Rust Warranty | 12 yr./ unlimited mi. | 4 yr./ 50000 mi. |
| Roadside Assistance | 4 yr./ unlimited mi. | 4 yr./ 50000 mi. |
| Hybrid Component Warranty | — | 6 yr./ 62000 mi. |
Frequently Asked Questions
Common questions about comparing the 2025 Alfa Romeo Stelvio and 2026 Mercedes-Benz GLB.
Which vehicle mandates the use of premium fuel?
Both the 2025 Alfa Romeo Stelvio and the 2026 Mercedes-Benz GLB explicitly require premium unleaded fuel for optimal operation.
How do the base drivetrain configurations differ?
The Stelvio comes standard with all-wheel drive, suggesting enhanced traction capabilities, whereas the GLB lists front-wheel drive as its base configuration.
What is the dimensional impact on parking or garaging?
The vehicles are dimensionally similar; the Stelvio is 2.2 inches longer (184.6 vs 182.4 inches), but the GLB is noticeably narrower by 2.7 inches (72.2 vs 74.9 inches).
Is the power gap reflected in the transmission types?
Yes, the Stelvio uses a traditional 8-speed shiftable automatic, while the GLB employs an 8-speed automated manual transmission.
How much more efficient is the GLB compared to the Stelvio on the highway?
The 2026 Mercedes-Benz GLB achieves 33 MPG highway, offering a 5 MPG advantage over the 2025 Alfa Romeo Stelvio's 28 MPG highway rating.
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