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Side-by-Side Bike Comparison · September 2026

Roadmaster Rex vs Runner Bike RT

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

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⚡ Power Leader

Roadmaster

Roadmaster Rex

Engine 80 cc

Power 6 bhp

Mileage 60 kmpl

Brakes / ABS N/A

Price in BD ৳70,900

Details

💎 Best Value

RUNNER

Runner Bike RT

Engine 80 cc

Power 5.9 bhp

Mileage 50 kmpl

Brakes / ABS No

Price in BD ৳64,000

Details

01 / Bottom-Line Takeaway

Quick Verdict

Editorial Positioning

POWER & HARDWARE #1

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.

VALUE CHAMPION #2

Runner Bike RT ( Runner Bike RT)

The Value Argument

Maximizes features per taka spent at ৳64,000. 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: 6 Bhp

Roadmaster Rex (Roadmaster Rex) 6 bhp @ 8000 rpm

Runner Bike RT ( Runner Bike RT) 5.9 bhp @ 7500 rpm

Peak Torque Delivery (Nm) Top: 5.5 Nm

Roadmaster Rex (Roadmaster Rex) 0 Nm

Runner Bike RT ( Runner Bike RT) 5.5 Nm @ 4500 rpm

Claimed Top Speeds

80 km/h

Roadmaster Rex (Roadmaster Rex)

80 km/h

Runner Bike RT ( Runner Bike RT)

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)

8.6 / 10

Performance 9.5

Comfort 8.5

Tech & Features 6.8

Fuel Economy 9.5

Value for Money 8.6

RUNNER

Runner Bike RT ( Runner Bike RT)

8.3 / 10

Performance 9.4

Comfort 7.5

Tech & Features 6.8

Fuel Economy 8.9

Value for Money 8.8

06 / Full Technical Comparison

Specification Sheet

Show Differences Only

Bike Information 11

Bike Name	Roadmaster Rex	Runner Bike RT
Brand	Roadmaster	Runner
CC	80	80
Regular Price	70900	64000
Bike Type	Commuter	Commuter
Distributor/Seller	Roadmaster Motors LTD	Runner Automobiles Limited
Model Year	N/A	N/A
Brand Origin	N/A	Bangladesh
Made In	N/A	Bangladesh
Assemble In	N/A	Bangladesh
Launched Date	N/A	N/A

Engine 15

Engine Type	4 – Stroke Single Cylinder	Single cylinder, 4-stroke, wind-cooled
Displacement	79	86
Maximum Power	6 Bhp @ 8000 RPM	5.9 Bhp @ 7500 RPM
Maximum Torque	0 NM @ 0 RPM	5.5 NM @ 4500 RPM
Bore	N/A	47 mm
Stroke	N/A	49.5 mm
Compression Ratio	N/A	8.5 : 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	600 ml (With Out Filter)
Best Lube For	N/A	Mobil Super 4T 20W50

Transmission 4

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

Mileage & Top Speed 2

Mileage	60 Kmpl (Approx)	50 Kmpl (Approx)
Top Speed	80 Kmph (Approx)	80 Kmph (Approx)

Chassis & Suspension 3

Chassis Type	N/A	Fabricated Spine
Front Suspension	Telescopic	Hydraulic Telescopic
Rear Suspension	Twin-Spring loaded	Coil spring Hydraulic

Brakes 6

Front Brake Type	Single Disc	Drum Brake
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	Drum Brake

Wheels & Tyres 4

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

Dimensions 8

Overall Length	1940 mm	1840 mm
Overall Width	800 mm	795 mm
Height	1300 mm	1210 mm
Ground Clearance	N/A	150 mm
Weight	88.8 Kg	86 Kg
Fuel Tank Capacity	9.5L	8 Liters
Wheelbase	1200 mm	1200 mm
Seat Height	N/A	N/A

Electricals 5

Battery Type	MF	MF
Battery Voltage	12v	12V 5Ah
Head Light	Halogen	35W/35W 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	No	No
Additional Feature	N/A	N/A