Engineered by Aprilia for the scooter motorcycle segment, the 2009 Aprilia Atlantic 400 Sprint utilizes a 399 cc (24.4 cu in) liquid-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 33.5 HP (24.5 kW), transferring power to the rear wheel through a automatic gearbox. With a specific output of 84 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the Atlantic 400 Sprint measures 199 kg (439 lbs) dry, translating to a power-to-weight ratio of 0.17 HP/kg (5.94 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 1,550 mm (61 in) wheelbase engineered for planted straight-line stability. The 15-liter (4 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Aprilia archive, this model family spans 3 indexed model years from 2007 to 2009, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
84 HP/L
Power-to-Weight
0.17 HP/kg (5.94 kg/HP)
Standover Height
780 mm (30.7 in)
Engine
Displacement399.0 ccm (24.35 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power33.5 HP (24.5 kW))
Compression10.5:1
Valves/Cylinder4
Fuel SystemInjection. Electronic fuel injection
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionElectronic CDI with automatic advance
LubricationWet sump. Forced lubrication with mechanical oil pump
CoolingLiquid
Transmission
GearboxAutomatic
ClutchAutomatic centrifugal dry clutch
Chassis
Frame TypeHigh-strength tubular steel frame with closed double cradle
Front Suspension35 mm hydraulic fork. Wheel travel 105 mm
Rear SuspensionEngine acting as swingarm. Two gas filled shock absorbers with 5 position spring preload adjustment. Wheel travel 90 mm
Wheelbase1550 mm (61.0 inches)
Wheels & Brakes
Front Tyre120/70-14
Rear Tyre120/70-14
Front BrakesSingle disc
Front Brake Ø260 mm (10.2 inches)
Rear BrakesSingle disc
Rear Brake Ø190 mm (7.5 inches)
Dimensions & Weight
Dry Weight199.0 kg (438.7 pounds)
Power/Weight0.1684 HP/kg
Seat Height780 mm (30.7 inches) If adjustable, lowest setting.
Overall Height1370 mm (53.9 inches)
Overall Length2200 mm (86.6 inches)
Overall Width815 mm (32.1 inches)
Fuel Capacity15.00 litres (3.96 US gallons)
Other
StarterElectric
Color OptionsExcalibur Grey, Competition Black, Planet Blue
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.
