2023 Piaggio Liberty S 150 Technical Analysis & Specification Breakdown
At the heart of the 2023 Piaggio Liberty S 150 scooter motorcycle, Piaggio relies on a 155 cc (9.5 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 12.5 HP (9.1 kW) at 7,250 rpm while maximum torque reaches 12.8 Nm (9.4 lb-ft) at 6,500 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 80.6 HP per liter and a 750 rpm working window between peak torque (6,500 rpm) and peak power (7,250 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 paired with a rated consumption of 2.71 L/100 km provides an estimated theoretical range of roughly 221 km (137 miles) between fill-ups.
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
80.6 HP/L
Power Band Window
6,500–7,250 rpm
Theoretical Range
~221 km (137 mi)
Engine
Displacement155.0 ccm (9.46 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power12.5 HP (9.1 kW)) @ 7250 RPM
Torque12.8 Nm (1.3 kgf-m or 9.4 ft.lbs) @ 6500 RPM
Bore x Stroke58.0 x 58.6 mm (2.3 x 2.3 inches)
Valves/Cylinder3
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
LubricationWet sump
CoolingAir
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchAutomatic centrifugal, dry
DrivelineCVT with torque server
Performance
Fuel Consumption2.71 litres/100 km (36.9 km/l or 86.80 mpg)
Greenhouse Gases62.9 CO2 g/km. (CO2 - Carbon dioxide emission)
Emission DetailsEuro 5
Chassis
Frame TypeHigh strength reinforced tubular steel
Front SuspensionTelescopic fork
Front Travel76 mm (3.0 inches)
Rear SuspensionSingle hydraulic shock absorber with adjustable preload with 4 settings
Rear Travel74 mm (2.9 inches)
Wheelbase1340 mm (52.8 inches)
Wheels & Brakes
Front Tyre90/80-16
Rear Tyre100/80-14
Front BrakesSingle disc. Front-wheel-only ABS
Front Brake Ø240 mm (9.4 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø140 mm (5.5 inches)
WheelsAlloy rims
Dimensions & Weight
Seat Height790 mm (31.1 inches) If adjustable, lowest setting.
Overall Length1945 mm (76.6 inches)
Overall Width690 mm (27.2 inches)
Fuel Capacity6.00 litres (1.59 US gallons)
Reserve Fuel1.50 litres (0.40 US gallons)
Other
StarterElectric
Color OptionsWhite, grey, brown, black
InstrumentsAnalogue/digital
Carrying CapacityUnderseat storage with USB socket.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
