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Side-by-Side Bike Comparison · September 2026

Keeway RKS 150 Sports vs Roadmaster Prime 80

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

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⚡ Power Leader

Keeway

Keeway RKS 150 Sports

Engine 150 cc

Power 11.9 bhp

Mileage 40 kmpl

Brakes / ABS No

Price in BD ৳149,900

Details

💎 Best Value

Roadmaster

Roadmaster Prime 80

Engine 80 cc

Power 6 bhp

Mileage 65 kmpl

Brakes / ABS N/A

Price in BD ৳60,900

Details

01 / Bottom-Line Takeaway

Quick Verdict

Editorial Positioning

POWER & HARDWARE #1

Keeway RKS 150 Sports (Keeway RKS 150 Sports)

The Performance Benchmark

Delivers class-leading punch with 11.9 bhp and sharp throttle response. Backed by No for riders demanding confidence in high-speed and emergency scenarios.

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

VALUE CHAMPION #2

Roadmaster Prime 80 (Roadmaster Prime 80)

The Value Argument

Maximizes features per taka spent at ৳60,900. Ideal balance of equipment and accessible dealer pricing without sacrificing daily road manners.

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

02 / Engine Output Benchmarks

The Dyno Room

Peak Bhp & Torque Scaled

Peak Power Output (Bhp) Top: 11.9 Bhp

Keeway RKS 150 Sports (Keeway RKS 150 Sports) 11.9 bhp @ 8500 rpm

Roadmaster Prime 80 (Roadmaster Prime 80) 6 bhp @ 8000 rpm

Peak Torque Delivery (Nm) Top: 11 Nm

Keeway RKS 150 Sports (Keeway RKS 150 Sports) 11 Nm @ 6000 rpm

Roadmaster Prime 80 (Roadmaster Prime 80) 0 Nm

Claimed Top Speeds

120 km/h

Keeway RKS 150 Sports (Keeway RKS 150 Sports)

70 km/h

Roadmaster Prime 80 (Roadmaster Prime 80)

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.

Keeway

Keeway RKS 150 Sports (Keeway RKS 150 Sports)

7.8 / 10

Performance 9.5

Comfort 7.2

Tech & Features 7.4

Fuel Economy 8.2

Value for Money 6.5

Roadmaster

Roadmaster Prime 80 (Roadmaster Prime 80)

8.1 / 10

Performance 7.8

Comfort 7.8

Tech & Features 6.8

Fuel Economy 9.5

Value for Money 8.8

06 / Full Technical Comparison

Specification Sheet

Show Differences Only

Bike Information 11

Bike Name	Keeway RKS 150 Sports	Roadmaster Prime 80
Brand	Keeway	Roadmaster
CC	150	80
Regular Price	149900	60900
Bike Type	Standard	Commuter
Distributor/Seller	Aftab Automobiles Limited	Roadmaster Motors LTD
Model Year	N/A	N/A
Brand Origin	China	N/A
Made In	China	N/A
Assemble In	Bangladesh	N/A
Launched Date	N/A	N/A

Engine 15

Engine Type	4 – Stroke Single Cylinder	4 – Stroke Single Cylinder
Displacement	148	84.41
Maximum Power	11.9 Bhp @ 8500 RPM	6 Bhp @ 8000 RPM
Maximum Torque	11 NM @ 6000 RPM	0 NM @ 0 RPM
Bore	57 mm	N/A
Stroke	58 mm	N/A
Compression Ratio	9.27:1	N/A
Valves	N/A	N/A
Fuel Supply	Carburetor	Carburetor
No of Cylinders	1	1
Engine Cooling	Air Cooled	Air Cooled
Starting Method	Kick & Electric	Kick & Electric
Engine Oil Grade	N/A	N/A
Engine Oil Capacity	N/A	N/A
Best Lube For	N/A	N/A

Transmission 4

Transmission Type	Manual	Manual
No of Gears	5	4
Clutch Type	Wet-multiplate	Wet multi-disc clutc
Drive Type	Chain Drive	N/A

Mileage & Top Speed 2

Mileage	40 Kmpl (Approx)	65 Kmpl (Approx)
Top Speed	120 Kmph (Approx)	70 Kmph (Approx)

Chassis & Suspension 3

Chassis Type	Arch bar truck	N/A
Front Suspension	Telescopic Forks	Telescopic
Rear Suspension	Mono-Telescopic coil spring oil damped	Mechanical Spring

Brakes 6

Front Brake Type	Single Disc	Drum Brake
Rear Brake Type	Disc Brake	Drum Brake
Front Brake Diameter	N/A	N/A
Rear Brake Diameter	N/A	N/A
Anti-Lock Braking System (ABS)	No	N/A
Braking System	CBS Braking	N/A

Wheels & Tyres 4

Front Tyre Size	90/90-17	2.50-17
Rear Tyre Size	110/80-17	2.75-17
Tyre Type	Tubeless	Tubetyre
Wheel Type	Alloy	Alloy

Dimensions 8

Overall Length	2,040 mm	1930 mm
Overall Width	780 mm	860 mm
Height	1,070 mm	1210 mm
Ground Clearance	185 mm	160 mm
Weight	121 Kg	87.5 Kg
Fuel Tank Capacity	16 L	8.5L
Wheelbase	1,260 mm	1200 mm
Seat Height	N/A	N/A

Electricals 5

Battery Type	MF	MF
Battery Voltage	12N7-4B	12v
Head Light	Halogen	12V 35/35W (Halogen)
Tail Light	Halogen	Halogen
Indicators	Halogen	Halogen

Features 8

Speedometer	Digital	Analog
Odometer	Digital	Analog
RPM Meter	Digital	Digital
Handle Type	Pipe handle bar	Pipe handle bar
Seat Type	Split-Seat	Single-Seat
Passenger Grab Rail	Yes	Yes
Engine Kill Switch	Yes	No
Additional Feature	N/A	N.A