At the heart of the 2008 Piaggio XEvo 400 scooter motorcycle, Piaggio relies on a 399 cc (24.4 cu in) liquid-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 33 HP (24.1 kW) at 7,250 rpm while maximum torque reaches 36 Nm (26.6 lb-ft) at 5,500 rpm, transferring power to the rear wheel through a automatic gearbox. With a specific output of 82.7 HP per liter and a 1,750 rpm working window between peak torque (5,500 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.
On the scales, the XEvo 400 measures 198 kg (437 lbs) dry, translating to a power-to-weight ratio of 0.17 HP/kg (6 kg per horsepower). 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 1,540 mm (60.6 in) wheelbase engineered for planted straight-line stability. The 12-liter (3.2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Piaggio archive, this model family spans 3 indexed model years from 2008 to 2011, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
82.7 HP/L
Power-to-Weight
0.17 HP/kg (6 kg/HP)
Power Band Window
5,500–7,250 rpm
Standover Height
790 mm (31.1 in)
Engine
Displacement399.0 ccm (24.35 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power33.0 HP (24.1 kW)) @ 7250 RPM
Torque36.0 Nm (3.7 kgf-m or 26.6 ft.lbs) @ 5500 RPM
Compression10.5:1
Bore x Stroke85.8 x 69.0 mm (3.4 x 2.7 inches)
CoolingLiquid
Transmission
GearboxAutomatic
Chassis
Frame TypeSteel tube double cradle
Front SuspensionØ 35 mm tele-hydraulic fork,
Front Travel94 mm (3.7 inches)
Rear SuspensionTwo dual-effect shock absorbers and four-position spring preload,
Rear Travel90 mm (3.5 inches)
Wheelbase1540 mm (60.6 inches)
Wheels & Brakes
Front Tyre120/70-14
Rear Tyre140/70-14
Front BrakesDouble disc
Front Brake Ø240 mm (9.4 inches)
Rear BrakesSingle disc
Rear Brake Ø240 mm (9.4 inches)
Dimensions & Weight
Dry Weight198.0 kg (436.5 pounds)
Power/Weight0.1667 HP/kg
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.
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.
