Overview Verdict The Dyno Room LIVE AI Engine Full Specs Media & Gallery

Compare Bikes Compare Accessories

Side-by-Side Bike Comparison · September 2026

Roadmaster Prime 100 vs Roadmaster Rex

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

Add Bike to Comparison

⚡ Power Leader

Roadmaster

Roadmaster Prime 100

Engine 100 cc

Power 6 bhp

Mileage 60 kmpl

Brakes / ABS No

Price in BD ৳76,900

Details

⚡ Power Leader

Roadmaster

Roadmaster Rex

Engine 80 cc

Power 6 bhp

Mileage 60 kmpl

Brakes / ABS N/A

Price in BD ৳70,900

Details

01 / Bottom-Line Takeaway

Quick Verdict

Editorial Positioning

POWER & HARDWARE #1

Roadmaster Prime 100 (Roadmaster Prime 100)

The Performance Benchmark

Delivers class-leading punch with 6 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.

POWER & HARDWARE #2

Roadmaster Rex (Roadmaster Rex)

The Performance Benchmark

Delivers class-leading punch with 6 bhp and sharp throttle response. Backed by N/A 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: 6 Bhp

Roadmaster Prime 100 (Roadmaster Prime 100) 6 bhp @ 8000 rpm

Roadmaster Rex (Roadmaster Rex) 6 bhp @ 8000 rpm

Peak Torque Delivery (Nm) Top: 6.5 Nm

Roadmaster Prime 100 (Roadmaster Prime 100) 6.5 Nm @ 5000 rpm

Roadmaster Rex (Roadmaster Rex) 0 Nm

Claimed Top Speeds

90 km/h

Roadmaster Prime 100 (Roadmaster Prime 100)

80 km/h

Roadmaster Rex (Roadmaster Rex)

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 Prime 100 (Roadmaster Prime 100)

8.5 / 10

Performance 9.5

Comfort 8.2

Tech & Features 6.8

Fuel Economy 9.5

Value for Money 8.6

Roadmaster

Roadmaster Rex (Roadmaster Rex)

8.6 / 10

Performance 9.5

Comfort 8.5

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	Roadmaster Prime 100	Roadmaster Rex
Brand	Roadmaster	Roadmaster
CC	100	80
Regular Price	76900	70900
Bike Type	Commuter	Commuter
Distributor/Seller	Roadmaster Motors LTD	Roadmaster Motors LTD
Model Year	N/A	N/A
Brand Origin	N/A	N/A
Made In	N/A	N/A
Assemble In	N/A	N/A
Launched Date	N/A	N/A

Engine 15

Engine Type	4 – Stroke Single Cylinder	4 – Stroke Single Cylinder
Displacement	99	79
Maximum Power	6 Bhp @ 8000 RPM	6 Bhp @ 8000 RPM
Maximum Torque	6.5 NM @ 5000 RPM	0 NM @ 0 RPM
Bore	N/A	N/A
Stroke	N/A	N/A
Compression Ratio	N/A	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	4	4
Clutch Type	Multi - disc wet clu	Wet multi-disc clutc
Drive Type	N/A	N/A

Mileage & Top Speed 2

Mileage	60 Kmpl (Approx)	60 Kmpl (Approx)
Top Speed	90 Kmph (Approx)	80 Kmph (Approx)

Chassis & Suspension 3

Chassis Type	N/A	N/A
Front Suspension	Telescopic	Telescopic
Rear Suspension	Mechanical Spring	Twin-Spring loaded

Brakes 6

Front Brake Type	Drum Brake	Single Disc
Rear Brake Type	Drum 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	N/A	N/A

Wheels & Tyres 4

Front Tyre Size	2.75-17	2.50-17
Rear Tyre Size	3.00-17	2.75-17
Tyre Type	Tubeless	Tubetyre
Wheel Type	Alloy	Alloy

Dimensions 8

Overall Length	1980 mm	1940 mm
Overall Width	860 mm	800 mm
Height	1260 mm	1300 mm
Ground Clearance	160 mm	N/A
Weight	102 Kg	88.8 Kg
Fuel Tank Capacity	15L	9.5L
Wheelbase	1290 mm	1200 mm
Seat Height	N/A	N/A

Electricals 5

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

Features 8

Speedometer	Analog	Analog
Odometer	Analog	Analog
RPM Meter	Digital	Digital
Handle Type	Pipe handle bar	Pipe handle bar
Seat Type	Single-Seat	Single-Seat
Passenger Grab Rail	Yes	Yes
Engine Kill Switch	Info-Not-Available	No
Additional Feature	N/A	N/A