2025 Kia Niro Plug-In Hybrid vs 2026 Mercedes-Benz GLB
Comparison Overview
Choosing between efficiency and luxury often presents a major dilemma for compact crossover buyers. The 2025 Kia Niro Plug-In Hybrid starts at a tempting $34,490, significantly undercutting the 2026 Mercedes-Benz GLB's $43,800 MSRP by $9,310. The Niro focuses heavily on mileage, delivering a combined 48 MPG and offering 33 miles of all-electric range, a stark contrast to the GLB's 28 combined MPG (requiring premium fuel). While the Mercedes packs more punch with 221 hp and 258 lb-ft of torque compared to the Kia's 180 hp, this power comes at the cost of efficiency and upfront investment. The GLB offers slightly more space overall, boasting 22 cu ft of cargo capacity versus the Niro's 19.4 cu ft, but the Niro’s FWD configuration and superior fuel economy make it the pragmatic choice for daily driving.
Size Comparison
Performance
Fuel Efficiency
Full Specifications
Our Verdicts
2025 Kia Niro Plug-In Hybrid
The Niro PHEV wins for commuters due to its massive 48 combined MPG and 33 miles of electric-only capability, maximizing daily savings.
2026 Mercedes-Benz GLB
The Mercedes-Benz GLB is better for families due to its taller stature (66.7 inches vs 60.8 inches) and slightly larger 22 cu ft cargo area.
2026 Mercedes-Benz GLB
Enthusiasts will prefer the GLB because it offers significantly higher power figures, producing 221 hp and 258 lb-ft of torque.
2025 Kia Niro Plug-In Hybrid
The Kia Niro is the clear value winner, costing $9,310 less while providing vastly superior fuel economy.
Choose the Kia Niro Plug-In Hybrid if...
- Your top priority is minimizing running costs, given its 48 combined MPG rating.
- You want to utilize electric power frequently, as it boasts a 33-mile electric range.
- You are looking to save over $9,000 upfront, as the MSRP is $34,490.
Choose the Mercedes-Benz GLB if...
- You require more power and prefer the driving dynamics associated with 221 hp and 258 lb-ft of torque.
- You need maximum vertical space and utility, evidenced by its 66.7-inch height and 22 cu ft cargo capacity.
- You are willing to pay a premium and use required premium unleaded fuel for better acceleration and road presence.
Key Dimensions
| Dimension | Kia Niro Plug-In Hybrid | Mercedes-Benz GLB |
|---|---|---|
| Length | 174.0" | 182.4" |
| Width | 71.8" | 72.2" |
| Height | 60.8" | 66.7" |
| Wheelbase | 107.1" | 111.4" |
Features Comparison
Safety
| Feature | Kia | Mercedes-Benz |
|---|---|---|
| Blind Spot Monitor | ✓ | ✓ |
| Lane Departure Warning | ✓ | — |
| Lane Keeping Assist System | ✓ | — |
| Rear Cross Traffic Alert | ✓ | — |
| Driver Attention 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 | ✓ | ✓ |
| Headlight Delay-Off | ✓ | ✓ |
| 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 | ✓ | ✓ |
| Brake Drying | — | ✓ |
| Brake Preparation System | — | ✓ |
| LED Headlights | — | ✓ |
| Front Fog Lights | — | ✓ |
Engine
| Feature | Kia | Mercedes-Benz |
|---|---|---|
| Base Engine Displacement | 1.6 L | 2.0 L |
| Number of Cylinders | inline 4 | inline 4 |
| Base Engine Type | plug-in hybrid | mild hybrid |
| Horsepower | 180 hp | 221 hp @ 5500 rpm |
| Torque | 195 lb-ft | 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 | Kia | Mercedes-Benz |
|---|---|---|
| Transmission Type | 6-speed automated manual | 8-speed automated manual |
| Drivetrain Type | front wheel drive | front wheel drive |
| Hill Descent Control | ✓ | — |
Fuel
| Feature | Kia | Mercedes-Benz |
|---|---|---|
| Fuel Type | regular unleaded | premium unleaded (required) |
| EPA Fuel Economy (City/Highway) | 49/47 MPG | 25/33 MPG |
| EPA Fuel Economy (Combined) | 48 MPG | 28 MPG |
| EPA Driving Range (City/Highway) | 480.2/460.6 mi. | 397.5/524.7 mi. |
| EPA Efficiency (City/Highway MPGe) | 113/102 MPGe | — |
| EPA Efficiency (Combined MPGe) | 108 MPGe | — |
| EPA Electric Driving Range | 33 mi. | — |
| EPA Energy Consumption (kWh/100 mi) | 31 | — |
| Charging Time (240V) | 2.8 hr. | — |
| Fuel Tank Capacity | 9.8 gal. | 15.9 gal. |
| DC Fast Charging Port Type | SAE J1772 | — |
Comfort & Convenience
| Feature | Kia | 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 | ✓ | ✓ |
| Rear Parking Sensors | ✓ | ✓ |
| Wireless Charging Pad | ✓ | — |
| Adaptive Cruise Control | ✓ | — |
| Front Cupholders | ✓ | ✓ |
| Rear Cupholders | ✓ | ✓ |
| Front Door Pockets | ✓ | ✓ |
| Rear Door Pockets | ✓ | ✓ |
| Front Seatback Storage | ✓ | ✓ |
| Leatherette Steering Wheel | ✓ | — |
| Dual Zone Climate Control | ✓ | ✓ |
| Rear Ventilation Ducts | ✓ | ✓ |
| Extended Cabin Heating/Cooling | ✓ | — |
| Dual Vanity Mirrors | ✓ | ✓ |
| Turn Signal Indicators in Mirrors | ✓ | ✓ |
| Front Parking Sensors | — | ✓ |
| Driver Assisted Parking Assist | — | ✓ |
| Cruise Control | — | ✓ |
| Overhead Console with Storage | — | ✓ |
| Leather Steering Wheel | — | ✓ |
| Interior Air Filtration | — | ✓ |
| Auto-Dimming Rearview Mirror | — | ✓ |
In Car Entertainment
| Feature | Kia | Mercedes-Benz |
|---|---|---|
| Infotainment Display | 10.3 in | 10.25 in |
| AM/FM Stereo | ✓ | ✓ |
| Speaker System | 6 | — |
| Subwoofer Count | 1 | — |
| Android Auto (Wired) | ✓ | — |
| Apple CarPlay (Wired) | ✓ | — |
| USB Port | ✓ | ✓ |
| USB Port with External Media Control | ✓ | ✓ |
| Satellite Radio | With Real Time Traffic | ✓ |
| Satellite Radio Trial Period | 3 months | 6 months |
| Android Auto (Wireless) | — | ✓ |
| Apple CarPlay (Wireless) | — | ✓ |
Power Feature
| Feature | Kia | Mercedes-Benz |
|---|---|---|
| One-Touch Power Windows | 1 | 4 |
| Keyless Entry | ✓ | — |
| Heated Mirrors | ✓ | ✓ |
| Remote Keyless Entry | — | ✓ |
Frontseats
| Feature | Kia | Mercedes-Benz |
|---|---|---|
| Front Head Room | 40.5 in. | 40.7 in. |
| Front Leg Room | 41.5 in. | 41.1 in. |
| Front Shoulder Room | 56.2 in. | 55.9 in. |
| Front Hip Room | 53.3 in. | — |
| Seat Material: Leatherette/Cloth | ✓ | — |
| Front Seat Type: Bucket | ✓ | ✓ |
| Driver Seat Power Adjustments | 8-way | 8-way |
| Driver Seat Height Adjustment | ✓ | ✓ |
| Driver Seat Lumbar Support | Power | Power |
| Passenger Seat Manual Adjustments | 6-way | — |
| Passenger Seat Height Adjustment | ✓ | ✓ |
| Driver Seat Heating | Multi-level | Multi-level |
| Passenger Seat Heating | Multi-level | Multi-level |
| Seat Material: Leatherette | — | ✓ |
| Driver Seat Thigh Extension | — | ✓ |
| Driver Seat Memory Settings | — | 3 |
| Passenger Seat Power Adjustments | — | 8-way |
| Passenger Seat Lumbar Support | — | Power |
| Passenger Seat Thigh Extension | — | ✓ |
| Passenger Seat Memory Settings | — | 3 |
Rearseats
| Feature | Kia | Mercedes-Benz |
|---|---|---|
| Rear Head Room | 39.5 in. | 39.3 in. |
| Rear Leg Room | 39.8 in. | 38.1 in. |
| Rear Shoulder Room | 55.4 in. | 54.9 in. |
| Rear Hip Room | 53.0 in. | — |
| Split-Folding Rear Seatback | ✓ | ✓ |
| Folding Center Armrest | ✓ | ✓ |
| Reclining Rear Seats | — | ✓ |
Tires and Wheels
| Feature | Kia | Mercedes-Benz |
|---|---|---|
| Wheel Finish | Painted Alloy | — |
| Wheel Size | 16 x 6.5 in | 18 x 7.5 in |
| Tire Type | All Season | — |
| Tire Size | P205/60R H | 235/55R18 |
| Wheel Material | — | Alloy |
| Run Flat Tires | — | ✓ |
Suspension
| Feature | Kia | Mercedes-Benz |
|---|---|---|
| Four-Wheel Independent Suspension | ✓ | ✓ |
| Stabilizer Bar | ✓ | — |
| Front Stabilizer Bar | — | ✓ |
| Rear Stabilizer Bar | — | ✓ |
Warranty
| Feature | Kia | Mercedes-Benz |
|---|---|---|
| Basic Warranty | 5 yr./ 60000 mi. | 4 yr./ 50000 mi. |
| Drivetrain Warranty | 10 yr./ 100000 mi. | 4 yr./ 50000 mi. |
| EV Battery Warranty | 10 yr./ 100000 mi. | — |
| Hybrid Component Warranty | 10 yr./ 100000 mi. | 6 yr./ 62000 mi. |
| Corrosion/Rust Warranty | 5 yr./ 100000 mi. | 4 yr./ 50000 mi. |
| Roadside Assistance | 5 yr./ 60000 mi. | 4 yr./ 50000 mi. |
Frequently Asked Questions
Common questions about comparing the 2025 Kia Niro Plug-In Hybrid and 2026 Mercedes-Benz GLB.
How much more will it cost to fuel the Mercedes GLB compared to the Kia Niro PHEV?
The difference is substantial; the Kia Niro achieves 48 combined MPG, while the GLB only manages 28 combined MPG and requires more expensive premium fuel. This nearly 20 MPG difference means the GLB owner will spend significantly more at the pump annually.
Does the Kia Niro's size impact its usability compared to the Mercedes GLB?
Yes, the Kia is noticeably smaller, measuring 174.0 inches long versus the GLB's 182.4 inches. While the GLB offers 22 cu ft of cargo capacity versus the Niro's 19.4 cu ft, the Niro's smaller footprint makes it easier to maneuver in tight city spaces.
Is the performance gap between the two vehicles significant for normal driving?
There is a notable power difference; the GLB has 221 hp while the Niro has 180 hp. While the Niro is adequate, the GLB's superior horsepower and torque will make highway merging feel easier and driving more responsive.
What is the benefit of the Kia Niro's Plug-In Hybrid system over the GLB’s conventional gas engine?
The primary benefit is zero-emission travel; the Niro offers a 33-mile electric range, allowing many short trips to use no gasoline at all. The GLB, conversely, relies entirely on gasoline power for all 28 combined MPG.
Which vehicle is better equipped for hauling gear, based only on the provided specs?
The 2026 Mercedes-Benz GLB is slightly better for hauling, offering 22 cubic feet of cargo space compared to the 19.4 cubic feet found in the 2025 Kia Niro PHEV.
How do the transmissions compare in these two crossovers?
The Kia Niro uses a 6-speed automated manual transmission, focused on efficiency for its hybrid system. The Mercedes-Benz GLB utilizes a smoother-shifting 8-speed automated manual, usually paired with its higher-output engine.
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