At the heart of the 2009 Triumph Bonneville 50th classic motorcycle, Triumph features a 865 cc (52.8 cu in) air-cooled twin, four-stroke configuration. In factory specification, peak output is rated at 67.1 HP (48.9 kW) at 7,500 rpm while maximum torque reaches 69 Nm (50.9 lb-ft) at 5,800 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 77.6 HP per liter and a 1,700 rpm working window between peak torque (5,800 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 Bonneville 50th measures 203 kg (448 lbs) dry, translating to a power-to-weight ratio of 0.33 HP/kg (3.03 kg per horsepower). Rider ergonomics and chassis geometry center around a 751 mm (29.6 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,500 mm (59.1 in) wheelbase engineered for balanced agility and highway composure. The 16-liter (4.2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
77.6 HP/L
Power-to-Weight
0.33 HP/kg (3.03 kg/HP)
Power Band Window
5,800–7,500 rpm
Standover Height
751 mm (29.6 in)
Engine
Displacement865.0 ccm (52.78 cubic inches)
Engine TypeTwin, four-stroke
Engine DetailsTwin, four-stroke
Power67.1 HP (48.9 kW)) @ 7500 RPM
Torque69.0 Nm (7.0 kgf-m or 50.9 ft.lbs) @ 5800 RPM
Bore x Stroke90.0 x 68.0 mm (3.5 x 2.7 inches)
Fuel SystemInjection. Multipoint sequential electronic fuel injection with SAI
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
CoolingAir
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchWet. multi-plate
Chassis
Frame TypeTubular steel cradle
Rake27.0°
Trail106 mm (4.2 inches)
Front Suspension41mm forks. 120mm travel
Rear SuspensionChromed spring twin shocks with adjustable preload. 100mm rear wheel travel
Wheelbase1500 mm (59.1 inches)
Wheels & Brakes
Front Tyre100/70-R17
Rear Tyre130/80-R17
Front BrakesSingle disc
Front Brake Ø310 mm (12.2 inches)
Rear BrakesSingle disc
Rear Brake Ø255 mm (10.0 inches)
Dimensions & Weight
Dry Weight203.0 kg (447.5 pounds)
Power/Weight0.3303 HP/kg
Seat Height751 mm (29.6 inches) If adjustable, lowest setting.
Overall Height1100 mm (43.3 inches)
Overall Length2144 mm (84.4 inches)
Fuel Capacity16.00 litres (4.23 US gallons)
Other
StarterElectric
Color OptionsLight blue/orange
Notes
Limited edition of 650 bikes celebrating the 50th Anniversary of the Bonneville.
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.
