2021 Indian Roadmaster Technical Analysis & Specification Breakdown
Built around Indian's touring motorcycle platform, the 2021 Indian Roadmaster features a 1901 cc (116 cu in) air-cooled v2, four-stroke configuration. In factory specification, peak output is rated at 92 HP (67.2 kW) while maximum torque reaches 170.9 Nm (126 lb-ft) at 2,900 rpm, transferring power to the rear wheel through a 6-speed gearbox and belt final drive. With a specific output of 48.4 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the Roadmaster measures 420 kg (926 lbs) wet (curb), translating to a power-to-weight ratio of 0.22 HP/kg (4.57 kg per horsepower). Rider ergonomics and chassis geometry center around a 673 mm (26.5 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,668 mm (65.7 in) wheelbase engineered for planted straight-line stability. The 20.8-liter (5.5 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Indian archive, this model family spans 12 indexed model years from 2015 to 2026, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
48.4 HP/L
Power-to-Weight
0.22 HP/kg (4.57 kg/HP)
Standover Height
673 mm (26.5 in)
Engine
Displacement1901.0 ccm (116.00 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsThunderstroke® 116
Power92.0 HP (67.2 kW))
Torque170.9 Nm (17.4 kgf-m or 126.0 ft.lbs) @ 2900 RPM
Compression11.0:1
Bore x Stroke103.2 x 113.0 mm (4.1 x 4.4 inches)
Fuel SystemInjection. Closed loop fuel injection / 54 mm bore
WheelsHighlight Machine Tour wheels. Metzeler Cruisetec tyres.
Dimensions & Weight
Dry Weight405.0 kg (892.9 pounds)
Weight incl.420.0 kg (925.9 pounds)
Power/Weight0.2272 HP/kg
Seat Height673 mm (26.5 inches) If adjustable, lowest setting.
Overall Height1491 mm (58.7 inches)
Overall Length2656 mm (104.6 inches)
Overall Width1000 mm (39.4 inches)
Fuel Capacity20.80 litres (5.50 US gallons)
Other
StarterElectric
Color OptionsThunder Black Pearl, Maroon Metallic/Crimson Metallic, Alumina Jade/Thunder Black - Icon colors: Black Azure Crystal/Stealth Gray, Arizona Turquois/Pearl White, Blue Slate Smoke/Black Smoke
InstrumentsFairing-mounted instrument cluster featuring analog speedometer and tachometer with fuel gauge, range, odometer and current gear. 15 LED telltale indicators.
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.
