2004 Triumph Rocket III Technical Analysis & Specification Breakdown
Positioned in Triumph's custom - cruiser motorcycle lineup, the 2004 Triumph Rocket III utilizes a 2294 cc (140 cu in) liquid-cooled in-line three, four-stroke layout. In factory specification, peak output is rated at 140 HP (102.2 kW) at 5,750 rpm while maximum torque reaches 200 Nm (147.5 lb-ft) at 2,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and shaft drive (cardan) final drive. With a specific output of 61 HP per liter and a 3,250 rpm working window between peak torque (2,500 rpm) and peak power (5,750 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 Rocket III measures 320 kg (705 lbs) dry, translating to a power-to-weight ratio of 0.44 HP/kg (2.29 kg per horsepower). Rider ergonomics and chassis geometry center around a 740 mm (29.1 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,690 mm (66.5 in) wheelbase engineered for planted straight-line stability. The 25-liter (6.6 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Triumph archive, this model family spans 6 indexed model years from 2004 to 2009, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
61 HP/L
Power-to-Weight
0.44 HP/kg (2.29 kg/HP)
Power Band Window
2,500–5,750 rpm
Standover Height
740 mm (29.1 in)
Engine
Displacement2294.0 ccm (139.98 cubic inches)
Engine TypeIn-line three, four-stroke
Engine DetailsIn-line three, four-stroke
Power140.0 HP (102.2 kW)) @ 5750 RPM
Torque200.0 Nm (20.4 kgf-m or 147.5 ft.lbs) @ 2500 RPM
Compression8.7:1
Bore x Stroke101.6 x 94.3 mm (4.0 x 3.7 inches)
Fuel SystemInjection
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveShaft drive (cardan) (final drive)
Performance
0-100 km/h2.80 seconds
Chassis
Frame TypeTubular steel, twin spine
Rake32.0°
Trail150 mm (5.9 inches)
Front Suspension43mm upside down forks
Rear SuspensionChromed spring twin shocks with adjustable preload
Wheelbase1690 mm (66.5 inches)
Wheels & Brakes
Front Tyre150/80-V 17
Rear Tyre240/50-V 16
Front BrakesDouble disc
Front Brake Ø320 mm (12.6 inches)
Rear BrakesSingle disc
Rear Brake Ø316 mm (12.4 inches)
Dimensions & Weight
Dry Weight320.0 kg (705.5 pounds)
Power/Weight0.4375 HP/kg
Seat Height740 mm (29.1 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.
