Engineered by Piaggio for the scooter motorcycle segment, the 2023 Piaggio MP3 400 pairs a 399 cc (24.4 cu in) liquid-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 34.9 HP (25.5 kW) at 7,500 rpm while maximum torque reaches 37.7 Nm (27.8 lb-ft) at 5,750 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 87.5 HP per liter and a 1,750 rpm working window between peak torque (5,750 rpm) and peak power (7,500 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the MP3 400 measures 260 kg (573 lbs) wet (curb), translating to a power-to-weight ratio of 0.13 HP/kg (7.45 kg per horsepower). Rider ergonomics and chassis geometry center around a 780 mm (30.7 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,580 mm (62.2 in) wheelbase engineered for planted straight-line stability. The 13.7-liter (3.6 US gal) fuel tank paired with a rated consumption of 26.32 L/100 km provides an estimated theoretical range of roughly 52 km (32 miles) between fill-ups.
Within MotoLibrary's Piaggio archive, this model family spans 4 indexed model years from 2008 to 2023, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
87.5 HP/L
Power-to-Weight
0.13 HP/kg (7.45 kg/HP)
Power Band Window
5,750–7,500 rpm
Theoretical Range
~52 km (32 mi)
Engine
Displacement399.0 ccm (24.35 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power34.9 HP (25.5 kW)) @ 7500 RPM
Torque37.7 Nm (3.8 kgf-m or 27.8 ft.lbs) @ 5750 RPM
Bore x Stroke84.0 x 72.0 mm (3.3 x 2.8 inches)
Valves/Cylinder4
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
LubricationWet sump
CoolingLiquid
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchAutomatic, centrifugal dry clutch
DrivelineCVT with torque server
Performance
Fuel Consumption26.32 litres/100 km (3.8 km/l or 8.94 mpg)
Greenhouse Gases610.6 CO2 g/km. (CO2 - Carbon dioxide emission)
Emission DetailsEuro 5
Chassis
Frame TypeDouble cradle in high strength tubular steel
Front SuspensionParallelogram suspension system
Rear SuspensionHelical springs and dual shock absorbers
Wheelbase1580 mm (62.2 inches)
Wheels & Brakes
Front Tyre110/70-13
Rear Tyre140/70-14
Front BrakesDouble disc. ABS
Front Brake Ø258 mm (10.2 inches)
Rear BrakesSingle disc. ABS
Rear Brake Ø240 mm (9.4 inches)
WheelsTwo front wheels. Aluminium alloy rims.
Dimensions & Weight
Weight incl.260.0 kg (573.2 pounds)
Seat Height780 mm (30.7 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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
