Positioned in Benelli's allround motorcycle lineup, the 2021 Benelli Imperiale 400 features a 373.5 cc (22.8 cu in) air-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 20.8 HP (15.2 kW) at 5,500 rpm while maximum torque reaches 29 Nm (21.4 lb-ft) at 3,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 55.7 HP per liter and a 2,000 rpm working window between peak torque (3,500 rpm) and peak power (5,500 rpm), the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the Imperiale 400 measures 200 kg (441 lbs) dry, translating to a power-to-weight ratio of 0.1 HP/kg (9.62 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 1,450 mm (57.1 in) wheelbase engineered for balanced agility and highway composure. The 12-liter (3.2 US gal) fuel tank paired with a rated consumption of 3.2 L/100 km provides an estimated theoretical range of roughly 375 km (233 miles) between fill-ups.
Within MotoLibrary's Benelli archive, this model family spans 8 indexed model years from 2018 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
55.7 HP/L
Power-to-Weight
0.1 HP/kg (9.62 kg/HP)
Power Band Window
3,500–5,500 rpm
Theoretical Range
~375 km (233 mi)
Engine
Displacement373.5 ccm (22.79 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power20.8 HP (15.2 kW)) @ 5500 RPM
Torque29.0 Nm (3.0 kgf-m or 21.4 ft.lbs) @ 3500 RPM
Compression8.5:1
Bore x Stroke72.7 x 90.0 mm (2.9 x 3.5 inches)
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionECU – Delphi MT05
LubricationWet sump
CoolingAir
Transmission
Gearbox5-speed
Final DriveChain (final drive)
Performance
Fuel Consumption3.20 litres/100 km (31.3 km/l or 73.51 mpg)
Greenhouse Gases74.2 CO2 g/km. (CO2 - Carbon dioxide emission)
Emission DetailsEuro 4. Catalytic converter and oxygen sensors.
Chassis
Frame TypeDouble cradle with steel tubes and plates
Front SuspensionTelescopic forks Ø 41mm
Front Travel110 mm (4.3 inches)
Rear SuspensionRear swing arm with double shock absorber
Rear Travel65 mm (2.6 inches)
Wheelbase1450 mm (57.1 inches)
Ground Clearance170 mm (6.7 inches)
Wheels & Brakes
Front Tyre110/90-19
Rear Tyre130/80-18
Front BrakesSingle disc. ABS
Front Brake Ø300 mm (11.8 inches)
Rear BrakesSingle disc. ABS
Rear Brake Ø240 mm (9.4 inches)
WheelsSpoked rims
Dimensions & Weight
Dry Weight200.0 kg (440.9 pounds)
Power/Weight0.1040 HP/kg
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.
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.
