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Side-by-Side Bike Comparison · September 2026

Roadmaster Rapido vs Yamaha R15 V4 BS7

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

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💎 Best Value

Roadmaster

Roadmaster Rapido

Engine 150 cc

Power 13.6 bhp

Mileage 35 kmpl

Brakes / ABS No

Price in BD ৳135,900

Details

⚡ Power Leader

Yamaha

Yamaha R15 V4 BS7

Engine 150 cc

Power 18.1 bhp

Mileage 40 kmpl

Brakes / ABS Dual-Channel

Price in BD ৳660,000

Details

01 / Bottom-Line Takeaway

Quick Verdict

Editorial Positioning

VALUE CHAMPION #1

Roadmaster Rapido (Roadmaster Rapido)

The Value Argument

Maximizes features per taka spent at ৳135,900. Ideal balance of equipment and accessible dealer pricing without sacrificing daily road manners.

Best for: Budget-conscious riders looking for modern styling.

POWER & HARDWARE #2

Yamaha R15 V4 BS7 ( Yamaha R15 V4 BS7)

The Performance Benchmark

Delivers class-leading punch with 18.1 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.

02 / Engine Output Benchmarks

The Dyno Room

Peak Bhp & Torque Scaled

Peak Power Output (Bhp) Top: 18.1 Bhp

Roadmaster Rapido (Roadmaster Rapido) 13.6 bhp @ 8500 rpm

Yamaha R15 V4 BS7 ( Yamaha R15 V4 BS7) 18.1 bhp @ 10000 rpm

Peak Torque Delivery (Nm) Top: 14.2 Nm

Roadmaster Rapido (Roadmaster Rapido) 12.2 Nm @ 6000 rpm

Yamaha R15 V4 BS7 ( Yamaha R15 V4 BS7) 14.2 Nm @ 7500 rpm

Claimed Top Speeds

120 km/h

Roadmaster Rapido (Roadmaster Rapido)

140 km/h

Yamaha R15 V4 BS7 ( Yamaha R15 V4 BS7)

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.

Roadmaster

Roadmaster Rapido (Roadmaster Rapido)

8.3 / 10

Performance 8.6

Comfort 7.5

Tech & Features 7.4

Fuel Economy 9.1

Value for Money 8.8

Yamaha

Yamaha R15 V4 BS7 ( Yamaha R15 V4 BS7)

8 / 10

Performance 9.5

Comfort 7

Tech & Features 7.4

Fuel Economy 9.5

Value for Money 6.5

06 / Full Technical Comparison

Specification Sheet

Show Differences Only

Bike Information 11

Bike Name	Roadmaster Rapido	Yamaha R15 V4 BS7
Brand	Roadmaster	Yamaha
CC	150	150
Regular Price	135900	660000
Bike Type	Naked Sports	Sports
Distributor/Seller	Roadmaster Motors LTD	Aci Motors Ltd
Model Year	N/A	2024
Brand Origin	N/A	Japan
Made In	N/A	India
Assemble In	N/A	India
Launched Date	N/A	2021-05-25

Engine 15

Engine Type	4 – Stroke Single Cylinder	Liquid-cooled, 4-stroke, SOHC, 4-valve
Displacement	150	155
Maximum Power	13.6 Bhp @ 8500 RPM	18.1 Bhp @ 10000 RPM
Maximum Torque	12.2 NM @ 6000 RPM	14.2 NM @ 7500 RPM
Bore	N/A	58.0 mm
Stroke	N/A	58.7 mm
Compression Ratio	N/A	11.6 : 1
Valves	N/A	4
Fuel Supply	Carburetor	Fuel injection
No of Cylinders	1	1
Engine Cooling	Air Cooled	Liquid Cooled
Starting Method	Kick & Electric	Electric
Engine Oil Grade	N/A	10W40
Engine Oil Capacity	N/A	1 L (Without Filter)
Best Lube For	N/A	Mobil Racing 4T 10W40

Transmission 4

Transmission Type	Manual	Manual
No of Gears	5	6
Clutch Type	Wet Multiple-disc	Assist And Slipper Clutch
Drive Type	N/A	Chain Drive

Mileage & Top Speed 2

Mileage	35 Kmpl (Approx)	40 Kmpl (Approx)
Top Speed	120 Kmph (Approx)	140 Kmph (Approx)

Chassis & Suspension 3

Chassis Type	N/A	Deltabox
Front Suspension	Inverted Telescopic Fork	Telescopic upside Down Fork (USD Fork)
Rear Suspension	Monoshock	Linked-Type Monocross Suspension

Brakes 6

Front Brake Type	Single Disc	Disc Brake
Rear Brake Type	Disc Brake	Disc Brake
Front Brake Diameter	240 mm	282 mm
Rear Brake Diameter	220 mm	220 mm
Anti-Lock Braking System (ABS)	No	Dual-Channel
Braking System	CBS Braking	Dual-Channel ABS

Wheels & Tyres 4

Front Tyre Size	110/60-17	100/80-17M/C 52P
Rear Tyre Size	130/60-17	140/70R17M/C 66H
Tyre Type	Tubeless	Tubeless
Wheel Type	Alloy	Alloy

Dimensions 8

Overall Length	2050 mm	1,990 mm
Overall Width	830 mm	725 mm
Height	1290 mm	1,135 mm
Ground Clearance	170 mm	170 mm
Weight	138 Kg	141 kg
Fuel Tank Capacity	12L	11 L
Wheelbase	1330 mm	1,325 mm
Seat Height	N/A	815 mm

Electricals 5

Battery Type	MF	mf
Battery Voltage	12v	12V 4Ah
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	Single-Seat	Split-Seat
Passenger Grab Rail	Yes	No
Engine Kill Switch	Yes	Yes
Additional Feature	N/A	OBD-2, Track Mode / Street Mode, Y connect, VVA, Truction Control, Quick Shifter, Side Stand Cut-off