Positioned in Triumph's classic motorcycle lineup, the 2020 Triumph Bonneville Speedmaster pairs a 1200 cc (73.2 cu in) liquid-cooled twin, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 77 HP (56.2 kW) at 6,100 rpm while maximum torque reaches 106 Nm (78.2 lb-ft) at 4,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 64.2 HP per liter and a 2,100 rpm working window between peak torque (4,000 rpm) and peak power (6,100 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 Speedmaster measures 245.5 kg (541 lbs) dry, translating to a power-to-weight ratio of 0.31 HP/kg (3.19 kg per horsepower). Rider ergonomics and chassis geometry center around a 705 mm (27.8 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,510 mm (59.4 in) wheelbase engineered for balanced agility and highway composure. The 12-liter (3.2 US gal) fuel tank paired with a rated consumption of 4.3 L/100 km provides an estimated theoretical range of roughly 279 km (173 miles) between fill-ups.
Within MotoLibrary's Triumph archive, this model family spans 9 indexed model years from 2018 to 2026, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
64.2 HP/L
Power-to-Weight
0.31 HP/kg (3.19 kg/HP)
Power Band Window
4,000–6,100 rpm
Theoretical Range
~279 km (173 mi)
Engine
Displacement1200.0 ccm (73.22 cubic inches)
Engine TypeTwin, four-stroke
Power77.0 HP (56.2 kW)) @ 6100 RPM
Torque106.0 Nm (10.8 kgf-m or 78.2 ft.lbs) @ 4000 RPM
Compression10.0:1
Bore x Stroke97.6 x 80.0 mm (3.8 x 3.1 inches)
Valves/Cylinder4
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet, multi-plate assist clutch
Performance
Fuel Consumption4.30 litres/100 km (23.3 km/l or 54.70 mpg)
Greenhouse Gases99.8 CO2 g/km. (CO2 - Carbon dioxide emission)
Emission DetailsEuro 4
ExhaustChromed 2 into 2 exhaust system with twin chrome silencers
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.
