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MotoLibrary Score
34/100Commuter
Power/Weight
0.08 hp/kg
Engine
125 ccm
Technical Overview
2021 Royal Alloy TG 125 Technical Analysis & Specification Breakdown
Engineered by Royal for the scooter motorcycle segment, the 2021 Royal Alloy TG 125 relies on a 125 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 12 HP (8.8 kW), transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 96 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the Alloy TG 125 measures 148 kg (326 lbs) dry, translating to a power-to-weight ratio of 0.08 HP/kg (12.33 kg per horsepower). Rider ergonomics and chassis geometry center around a 770 mm (30.3 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,390 mm (54.7 in) wheelbase engineered for quick, flickable steering geometry. The 11-liter (2.9 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
96 HP/L
Power-to-Weight
0.08 HP/kg (12.33 kg/HP)
Standover Height
770 mm (30.3 in)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power12.0 HP (8.8 kW))
Fuel SystemInjection
CoolingLiquid
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchAutomatic CVT
Performance
Emission DetailsEuro 4
Chassis
Frame TypeSteel Cradle
Front SuspensionDouble hydraulic preload adjustable shock absorber with coil spring.
Rear SuspensionDouble Shock
Wheelbase1390 mm (54.7 inches)
Wheels & Brakes
Front Tyre110/70-12
Rear Tyre120/70-12
Front BrakesSingle disc
Front Brake Ø220 mm (8.7 inches)
Rear BrakesSingle disc
Rear Brake Ø220 mm (8.7 inches)
WheelsCast
Dimensions & Weight
Dry Weight148.0 kg (326.3 pounds)
Power/Weight0.0811 HP/kg
Seat Height770 mm (30.3 inches) If adjustable, lowest setting.
Overall Height1115 mm (43.9 inches)
Overall Length1870 mm (73.6 inches)
Overall Width620 mm (24.4 inches)
Fuel Capacity11.00 litres (2.91 US gallons)
Other
StarterElectric
Color OptionsBurgundy Red/Ivory, Ultra Blue/Ivory, Pewter Grey/Ivory, Odyssey Red/Ivory
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
