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Side-by-Side Bike Comparison · September 2026

Roadmaster Rex vs Speeder Colt 150

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

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💎 Best Value

Roadmaster

Roadmaster Rex

Engine 80 cc

Power 6 bhp

Mileage 60 kmpl

Brakes / ABS N/A

Price in BD ৳70,900

Details

⚡ Power Leader

Speeder

Speeder Colt 150

Engine 150 cc

Power 13.4 bhp

Mileage 40 kmpl

Brakes / ABS No

Price in BD ৳164,500

Details

01 / Bottom-Line Takeaway

Quick Verdict

Editorial Positioning

VALUE CHAMPION #1

Roadmaster Rex (Roadmaster Rex)

The Value Argument

Maximizes features per taka spent at ৳70,900. 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

Speeder Colt 150 (Speeder Colt 150)

The Performance Benchmark

Delivers class-leading punch with 13.4 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.

02 / Engine Output Benchmarks

The Dyno Room

Peak Bhp & Torque Scaled

Peak Power Output (Bhp) Top: 13.4 Bhp

Roadmaster Rex (Roadmaster Rex) 6 bhp @ 8000 rpm

Speeder Colt 150 (Speeder Colt 150) 13.4 bhp @ 8500 rpm

Peak Torque Delivery (Nm) Top: 12.3 Nm

Roadmaster Rex (Roadmaster Rex) 0 Nm

Speeder Colt 150 (Speeder Colt 150) 12.3 Nm @ 7500 rpm

Claimed Top Speeds

80 km/h

Roadmaster Rex (Roadmaster Rex)

110 km/h

Speeder Colt 150 (Speeder Colt 150)

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 Rex (Roadmaster Rex)

8.2 / 10

Performance 7.6

Comfort 8.5

Tech & Features 6.8

Fuel Economy 9.5

Value for Money 8.8

Speeder

Speeder Colt 150 (Speeder Colt 150)

7.7 / 10

Performance 9.5

Comfort 7.6

Tech & Features 6.8

Fuel Economy 8.3

Value for Money 6.5

06 / Full Technical Comparison

Specification Sheet

Show Differences Only

Bike Information 11

Bike Name	Roadmaster Rex	Speeder Colt 150
Brand	Roadmaster	Speeder
CC	80	150
Regular Price	70900	164500
Bike Type	Commuter	Standard
Distributor/Seller	Roadmaster Motors LTD	Speeder Motorcycles Bangladesh
Model Year	N/A	N/A
Brand Origin	N/A	China
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	79	149.4
Maximum Power	6 Bhp @ 8000 RPM	13.4 Bhp @ 8500 RPM
Maximum Torque	0 NM @ 0 RPM	12.3 NM @ 7500 RPM
Bore	N/A	58.0 mm
Stroke	N/A	57.9 mm
Compression Ratio	N/A	9.8:1
Valves	N/A	2
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	20W50
Engine Oil Capacity	N/A	1 L (Without Filter)
Best Lube For	N/A	Mobil Super 4T 20W50

Transmission 4

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

Mileage & Top Speed 2

Mileage	60 Kmpl (Approx)	40 Kmpl (Approx)
Top Speed	80 Kmph (Approx)	110 Kmph (Approx)

Chassis & Suspension 3

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

Brakes 6

Front Brake Type	Single Disc	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)	N/A	No
Braking System	N/A	N/A

Wheels & Tyres 4

Front Tyre Size	2.50-17	110/80-17
Rear Tyre Size	2.75-17	130/70-18
Tyre Type	Tubetyre	Tubeless
Wheel Type	Alloy	Alloy

Dimensions 8

Overall Length	1940 mm	2000 mm
Overall Width	800 mm	760 mm
Height	1300 mm	1120 mm
Ground Clearance	N/A	200 mm
Weight	88.8 Kg	N/A
Fuel Tank Capacity	9.5L	13.4 L
Wheelbase	1200 mm	1340 mm
Seat Height	N/A	N/A

Electricals 5

Battery Type	MF	MF
Battery Voltage	12v	12v
Head Light	Halogen	Halogen
Tail Light	Halogen	LED
Indicators	Halogen	LED

Features 8

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