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Side-by-Side Bike Comparison · September 2026

GPX Demon GR250R vs Yamaha R15 V4

Technical comparison of performance curves, real-world dyno numbers, verified ratings, and full dynamic spec sheets.

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⚡ Power Leader

GPX

GPX Demon GR250R

Engine 250 cc

Power 29 bhp

Mileage 30 kmpl

Brakes / ABS Dual-Channel

Price in BD ৳414,990

Details

🌱 Top Economy

Yamaha

Yamaha R15 V4

R15 V4 Standard

Engine 155 cc

Power 18.1 bhp

Mileage 45 kmpl

Brakes / ABS Dual-Channel

Switch Variant

Price in BD ৳600,000

Details

01 / Bottom-Line Takeaway

Quick Verdict

Editorial Positioning

POWER & HARDWARE #1

GPX Demon GR250R (GPX Demon GR250R)

The Performance Benchmark

Delivers class-leading punch with 29 bhp and sharp throttle response. Backed by Dual-Channel for riders demanding confidence in high-speed and emergency scenarios.

Best for: Highway tours, enthusiast riding, emergency brake safety.

ECONOMY SPECIALIST #2

Yamaha R15 V4 (R15 V4 Standard)

The Economy Specialist

Lightest on fuel with an estimated 45 kmpl and manageable kerb weight (142 kg), minimizing your monthly running expenses.

Best for: High-mileage daily city commuters and courier riders.

02 / Engine Output Benchmarks

The Dyno Room

Peak Bhp & Torque Scaled

Peak Power Output (Bhp) Top: 29 Bhp

GPX Demon GR250R (GPX Demon GR250R) 29 bhp @ 9500 rpm

Yamaha R15 V4 (R15 V4 Standard) 18.1 bhp @ 10000 rpm

Peak Torque Delivery (Nm) Top: 23 Nm

GPX Demon GR250R (GPX Demon GR250R) 23 Nm @ 7500 rpm

Yamaha R15 V4 (R15 V4 Standard) 14.2 Nm @ 7500 rpm

Claimed Top Speeds

135 km/h

GPX Demon GR250R (GPX Demon GR250R)

140 km/h

Yamaha R15 V4 (R15 V4 Standard)

Dyno takeaway: Engine cooling hardware (liquid vs oil vs air) and gear ratios determine how long peak power can be sustained on open highway runs.

03 / Multi-Vector Scorecard

AI Analysis Engine

Rule-Based Specs Synthesizer

AI Engine Recommendation

Comparing power-to-weight, braking safety gear, real mileage data, and dealer price points across this matchup. Use the 5-point radar breakdown below to balance your budget against your daily riding style.

GPX

GPX Demon GR250R (GPX Demon GR250R)

8.1 / 10

Performance 9.5

Comfort 6.7

Tech & Features 7.4

Fuel Economy 8.3

Value for Money 8.8

Yamaha

Yamaha R15 V4 (R15 V4 Standard)

8.2 / 10

Performance 8.2

Comfort 7.8

Tech & Features 7.4

Fuel Economy 9.5

Value for Money 8

05 / Verified Owner Sentiment

Rider Community Ratings

Verified BD Rider Reviews

Yamaha

Yamaha R15 V4

0 verified owner feedback

★ 4.5

Overall Rating

06 / Full Technical Comparison

Specification Sheet

Show Differences Only

Bike Information 11

Bike Name	GPX Demon GR250R	Yamaha Metallic Black
Brand	GPX	Yamaha
CC	250	155
Regular Price	414990	610,000
Bike Type	Sports	Sports
Distributor/Seller	Speedoz Limited	ACI MOTORS LIMITED
Model Year	2025	2022
Brand Origin	Thailand	Japan
Made In	China	India
Assemble In	Bangladesh	India
Launched Date	2025-08-31	2022-05-22

Engine 15

Engine Type	Hyper Quadra, SOHC, 4 valve Liquid-cooled	Single Cylinder, Liquid Cooled, VVA
Displacement	249.6	155.1 cc
Maximum Power	29 Bhp @ 9500 RPM	18.1 Bhp @ 10000 RPM
Maximum Torque	23 NM @ 7500 RPM	14.2 NM @ 7500 RPM
Bore	77 mm	58.0 mm
Stroke	4	58.7 mm
Compression Ratio	N/A	11.6 : 1
Valves	4	4
Fuel Supply	Fuel Injection	Fuel Injection
No of Cylinders	1	1
Engine Cooling	Liquid Cooled	Liquid Cooled
Starting Method	Electric	Electric
Engine Oil Grade	10W-40	10W40
Engine Oil Capacity	1.2 L(Without Filter)	1 L (Without Filter)
Best Lube For	Mobil Racing 4T 10W40	—

Transmission 4

Transmission Type	Manual	Manual
No of Gears	6	6
Clutch Type	Wet-multiplate	Wet Type Multi-Plate Assist & Slipper Clutch
Drive Type	Chain Drive	Chain Drive

Mileage & Top Speed 2

Mileage	30 Kmpl (Approx)	40 Kmpl (Approx)
Top Speed	135 Kmph (Approx)	140 Kmph (Approx)

Chassis & Suspension 3

Chassis Type	Trellis Frame	Deltabox
Front Suspension	Upside Down Forks	Telescopic USD
Rear Suspension	Mono 7-Step Adjustable Monoshoc	Monoshock

Brakes 6

Front Brake Type	Single Disc	Single Disc
Rear Brake Type	Disc Brake	Disc Brake
Front Brake Diameter	276 mm	282 mm
Rear Brake Diameter	220 mm	220 mm
Anti-Lock Braking System (ABS)	Dual-Channel	Dual-Channel
Braking System	Dual Channel ABS	Dual Channel ABS

Wheels & Tyres 4

Front Tyre Size	110/70-17	100/80-17 M/C 52P
Rear Tyre Size	150/60-R17	140/70-R17 M/C 66H (Radial)
Tyre Type	Tubeless	Tubeless
Wheel Type	Alloy	Alloy

Dimensions 8

Overall Length	2020 Mm	1,990 mm
Overall Width	747 Mm	725 mm
Height	1145 Mm	1,135 mm
Ground Clearance	159 Mm	170 mm
Weight	158 kg	142 kg
Fuel Tank Capacity	11 L	11 L
Wheelbase	1,350 Mm	1,325 mm
Seat Height	815 Mm	815 mm

Electricals 5

Battery Type	MF	MF
Battery Voltage	12V 6Ah	12V, 4.0Ah
Head Light	LED	LED
Tail Light	LED	LED
Indicators	LED	Halogen

Features 8

Speedometer	Digital	Digital
Odometer	Digital	Digital
RPM Meter	Digital	Digital
Handle Type	Pipe handle bar	Three part handle bar
Seat Type	Split-Seat	Split-Seat
Passenger Grab Rail	Yes	—
Engine Kill Switch	Yes	Yes
Additional Feature	TCS (Traction Control System), Digital (TFT Display With Bluetooth Connectivily)	Quick Shifter, Side Stand kill Switch, Smartphone Bluetooth Connectivity, Traction Control System

07 / Video & Photo Showcase

Media & Gallery

Click to view popup

GPX Demon GR250R (GPX Demon GR250R)

GPX

1 Photo

HD Photos 1 image

No walkaround video available for this bike

Yamaha R15 V4 (R15 V4 Standard)

Yamaha

1 Photo

HD Photos 1 image

No walkaround video available for this bike

08 / Real-World Trade-Offs

Strengths & Trade-offs

Pros vs Cons

Yamaha

Yamaha R15 V4

Strengths

✓ Aggressive race-inspired styling with sharp fairing and LED lights gives it a high-end look.
✓ Smooth and refined 155 cc VVA engine delivers enjoyable power and usable performance on city and highway roads.
✓ Deltabox frame and USD front forks contribute to confident cornering and stable handling.
✓ Traction control, quick shifter, and a fully digital LCD cluster with Bluetooth connectivity add a tech edge.
✓ Real-world mileage averages generally agreed to be good for a sportbike (around ~40–45 km/l).

Trade-offs

✕ Aggressive sportbike seating can be uncomfortable on long rides.
✕ The ~11 liter tank is modest — meaning more frequent fuel stops on long trips.
✕ Pricier than many other 150 cc competitors.
✕ Rear seat space and comfort for a passenger is limited.

09 / Frequently Asked Questions

Frequently Asked Questions

From compared bikes

Yamaha R15 V4 What is the engine specification of the R15 V4?

The Yamaha R15 V4 comes with a 155 cc, liquid-cooled, 4-stroke SOHC engine with VVA (Variable Valve Actuation), producing around 18.4 PS power and 14.2 Nm torque.

Yamaha R15 V4 What is the top speed of the R15 V4?

The bike can reach a top speed of approximately 140–145 km/h depending on conditions and riding style.

Yamaha R15 V4 How much is the fuel economy (mileage)?

Typical real-world mileage averages around 40–45 km/l.

Yamaha R15 V4 Does the R15 V4 have ABS (Anti-Lock Braking System)?

Yes — it comes equipped with dual-channel ABS for safer and more controlled braking.

Yamaha R15 V4 What is the fuel tank capacity?

The R15 V4’s fuel tank holds around 11 litres.

Yamaha R15 V4 Does it have smartphone connectivity?

Yes — the R15 V4 has a digital display with Bluetooth connectivity that works with Yamaha’s Y-Connect app.