2019 Piaggio Liberty S 150 Technical Analysis & Specification Breakdown
Engineered by Piaggio for the scooter motorcycle segment, the 2019 Piaggio Liberty S 150 utilizes a 155 cc (9.5 cu in) air-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 12.9 HP (9.4 kW) at 7,750 rpm while maximum torque reaches 13 Nm (9.6 lb-ft) at 5,250 rpm. With a specific output of 83.2 HP per liter and a 2,500 rpm working window between peak torque (5,250 rpm) and peak power (7,750 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
Rider ergonomics and chassis geometry center around a 790 mm (31.1 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,340 mm (52.8 in) wheelbase engineered for quick, flickable steering geometry. The 6-liter (1.6 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Piaggio archive, this model family spans 2 indexed model years from 2019 to 2023, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
83.2 HP/L
Power Band Window
5,250–7,750 rpm
Standover Height
790 mm (31.1 in)
Engine
Displacement155.0 ccm (9.46 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power12.9 HP (9.4 kW)) @ 7750 RPM
Torque13.0 Nm (1.3 kgf-m or 9.6 ft.lbs) @ 5250 RPM
Bore x Stroke58.0 x 48.8 mm (2.3 x 1.9 inches)
Fuel ControlSingle Overhead Cams (SOHC)
LubricationWet sump
CoolingAir
Transmission
ClutchAutomatic centrifugal dry clutch
Chassis
Frame TypeHigh resistance tubular steel
Front SuspensionTelescopic fork
Front Travel76 mm (3.0 inches)
Rear SuspensionSingle hydraulic shock absorber with 5-position preload adjustment,
Rear Travel74 mm (2.9 inches)
Wheelbase1340 mm (52.8 inches)
Wheels & Brakes
Front BrakesSingle disc. ABS
Front Brake Ø240 mm (9.4 inches)
Rear BrakesSingle disc. ABS Tamburo
Rear Brake Ø140 mm (5.5 inches)
Dimensions & Weight
Seat Height790 mm (31.1 inches) If adjustable, lowest setting.
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.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
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.
