Built around Enfield's classic motorcycle platform, the 2008 Enfield Thunderbird 350 utilizes a 346 cc (21.1 cu in) air-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 18 HP (13.1 kW) at 5,600 rpm while maximum torque reaches 27.5 Nm (20.3 lb-ft) at 3,500 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 52 HP per liter and a 2,100 rpm working window between peak torque (3,500 rpm) and peak power (5,600 rpm), the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the Thunderbird 350 measures 163 kg (359 lbs) dry, translating to a power-to-weight ratio of 0.11 HP/kg (9.06 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,370 mm (53.9 in) wheelbase engineered for quick, flickable steering geometry. The 14.5-liter (3.8 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 110 km/h (68 mph).
Within MotoLibrary's Enfield archive, this model family spans 9 indexed model years from 2002 to 2019, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
52 HP/L
Power-to-Weight
0.11 HP/kg (9.06 kg/HP)
Power Band Window
3,500–5,600 rpm
Engine
Displacement346.0 ccm (21.11 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power18.0 HP (13.1 kW)) @ 5600 RPM
Torque27.5 Nm (2.8 kgf-m or 20.3 ft.lbs) @ 3500 RPM
Compression7.3:1
Bore x Stroke70.0 x 90.0 mm (2.8 x 3.5 inches)
Fuel SystemCarburettor. CV
Fuel ControlOverhead Valves (OHV)
IgnitionDigital TCI
LubricationDry sump
CoolingAir
Transmission
Gearbox4-speed
Final DriveChain (final drive)
ClutchWet mulitiplate
Performance
Top Speed110.0 km/h (68.4 mph)
Chassis
Front SuspensionTelescopic fork
Rear SuspensionSwing arm
Wheelbase1370 mm (53.9 inches)
Ground Clearance140 mm (5.5 inches)
Wheels & Brakes
Front Tyre3.25-19
Rear Tyre3.50-19
Front BrakesExpanding brake (drum brake)
Front Brake Ø178 mm (7.0 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø152 mm (6.0 inches)
Dimensions & Weight
Dry Weight163.0 kg (359.4 pounds)
Power/Weight0.1104 HP/kg
Overall Height1080 mm (42.5 inches)
Overall Length2120 mm (83.5 inches)
Overall Width750 mm (29.5 inches)
Fuel Capacity14.50 litres (3.83 US gallons)
Other
StarterKick
Color OptionsBlack, red
Notes
Optional electric starter and front disk brake. Royal Enfield is made in India.
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.
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.
