Side-by-Side Bike Comparison ¡ September 2026

Bajaj Discover 125 Disc vs Roadmaster Rex

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

⚡ Power Leader
Bajaj Discover 125 Disc
Bajaj

Bajaj Discover 125 Disc

Bajaj Discover 125 Disc
Engine 125 cc
Power 10.8 bhp
Mileage 50 kmpl
Brakes / ABS No
Price in BD ā§ŗ160,600
Details
💎 Best Value
Roadmaster Rex
Roadmaster

Roadmaster Rex

Roadmaster Rex
Engine 80 cc
Power 6 bhp
Mileage 60 kmpl
Brakes / ABS N/A
Price in BD ā§ŗ70,900
Details
01 / Bottom-Line Takeaway

Quick Verdict

POWER & HARDWARE #1
Bajaj Discover 125 Disc ( Bajaj Discover 125 Disc)

The Performance Benchmark

Delivers class-leading punch with 10.8 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 Rex (Roadmaster Rex)

The Value Argument

Maximizes features per taka spent at ā§ŗ70,900. 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: 10.8 Bhp
Bajaj Discover 125 Disc ( Bajaj Discover 125 Disc) 10.8 bhp @ 8000 rpm
Roadmaster Rex (Roadmaster Rex) 6 bhp @ 8000 rpm
Peak Torque Delivery (Nm) Top: 10.8 Nm
Bajaj Discover 125 Disc ( Bajaj Discover 125 Disc) 10.8 Nm @ 5500 rpm
Roadmaster Rex (Roadmaster Rex) 0 Nm

Claimed Top Speeds

90 km/h
Bajaj Discover 125 Disc ( Bajaj Discover 125 Disc)
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.

Bajaj

Bajaj Discover 125 Disc ( Bajaj Discover 125 Disc)

7.7 / 10
Performance 9.5
Comfort 6.6
Tech & Features 6.8
Fuel Economy 8.9
Value for Money 6.5
Roadmaster

Roadmaster Rex (Roadmaster Rex)

8.3 / 10
Performance 7.9
Comfort 8.5
Tech & Features 6.8
Fuel Economy 9.5
Value for Money 8.8
06 / Full Technical Comparison

Specification Sheet

Bike Information 11
Bike Name Bajaj Discover 125 Disc Roadmaster Rex
Brand Bajaj Roadmaster
CC 125 80
Regular Price 160600 70900
Bike Type Commuter Commuter
Distributor/Seller Uttara Motors Limited Roadmaster Motors LTD
Model Year 2014 N/A
Brand Origin India N/A
Made In India N/A
Assemble In Bangladesh N/A
Launched Date N/A N/A
Engine 15
Engine Type 4 stroke, DTs-i 4 – Stroke Single Cylinder
Displacement 125 79
Maximum Power 10.8 Bhp @ 8000 RPM 6 Bhp @ 8000 RPM
Maximum Torque 10.8 NM @ 5500 RPM 0 NM @ 0 RPM
Bore 50 mm N/A
Stroke 58.6 mm N/A
Compression Ratio 9.8:1 N/A
Valves 2 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 20W50 N/A
Engine Oil Capacity 1 L (Without Filter) N/A
Best Lube For Mobil Super 4T 20W50 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 50 Kmpl (Approx) 60 Kmpl (Approx)
Top Speed 90 Kmph (Approx) 80 Kmph (Approx)
Chassis & Suspension 3
Chassis Type Single Down Tube N/A
Front Suspension Telescopic Fr.fork & Antifriction bush (Stroke 130 mm) Telescopic
Rear Suspension Nitrox/Gas Filled Rear Shockabsorbers (Stroke 110 mm) Twin-Spring loaded
Brakes 6
Front Brake Type Single Disc Single Disc
Rear Brake Type Drum Brake Drum Brake
Front Brake Diameter 200 mm N/A
Rear Brake Diameter 130 mm N/A
Anti-Lock Braking System (ABS) No N/A
Braking System Single disc N/A
Wheels & Tyres 4
Front Tyre Size 2.75-17M/C 41P 2.50-17
Rear Tyre Size 3.00-17×17, 50P 2.75-17
Tyre Type Tubeless Tubetyre
Wheel Type Alloy Alloy
Dimensions 8
Overall Length 1980 mm 1940 mm
Overall Width 714 mm 800 mm
Height 1078 mm 1300 mm
Ground Clearance 170 mm N/A
Weight 120 kg 88.8 Kg
Fuel Tank Capacity N/A 9.5L
Wheelbase 1306 mm 1200 mm
Seat Height 805 mm 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 No No
Additional Feature N/A N/A
07 / Video & Photo Showcase

Media & Gallery

Click to view popup
Bajaj Discover 125 Disc

Bajaj Discover 125 Disc ( Bajaj Discover 125 Disc)

Bajaj
1 Photo
HD Photos 1 image
Bajaj Discover 125 Disc Image 1
No walkaround video available for this bike
Roadmaster Rex

Roadmaster Rex (Roadmaster Rex)

Roadmaster
2 Photos
HD Photos 2 images
Roadmaster Rex Image 1
Roadmaster Rex Image 2
No walkaround video available for this bike
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