Cruisers
1983Triumph TR 6 Thunderbird
19 fields on record
The 1983 Triumph TR 6 Thunderbird is a versatile 650cc air-cooled twin suited for riders seeking classic British styling with practical everyday performance. Known for its manageable power delivery and lightweight frame, it excels as an accessible all-rounder for commuting and casual touring. The model represents Triumph's enduring appeal among those valuing character and heritage over raw speed.
- Capacity
- 648.0 ccm
- Engine
- Parallel Twin, four-stroke
- Gearbox
- 5-speed
- Wet weight
- 190.0 kg
- Seat height
- Not on record
Know it? Add it → - Power
- 42.0 HP (30.9 kW) @ 6500 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built as an all-round classic British twin for relaxed road riding rather than outright speed or long-distance touring comfort.
- Built for
- A charismatic, vintage-styled machine that rewards mechanical sympathy and an appreciation for classic motorcycling over raw performance.
- Not ideal for
- Not suited to riders seeking modern power, long-haul touring comfort, or any serious off-road capability.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Engine
- Capacity
- 648.0 ccm
- Power
- 42.0 HP (30.9 kW) @ 6500 RPM
- Engine type
- Parallel Twin, four-stroke
- Power/weight ratio
- 0.2211 HP/kg (wet)
- Bore x stroke
- 76.0 x 71.5 mm
- Compression
- 9.0:1
- Cooling system
- Air
- Valves per cylinder
- 2
- Torque
- Not on record - add it
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
Performance
- Top speed
- 160.0 km/h (99.4 mph)
Dimensions & weight
Brakes & wheels
- Front brakes
- Single disc
- Rear brakes
- Expanding brake
- Front tyre
- 3.25-19
- Rear tyre
- 4.00-18
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 1982 | 1983 |
|---|---|---|
| Capacity | 648 cc | 648 cc |
| Fuel capacity | 18.5 L | 18.5 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Triumph TR 6 Thunderbird?
The 1983 Triumph TR 6 Thunderbird has a Capacity of 648.0 ccm (39.54 cubic inches).
What engine power does the Triumph TR 6 Thunderbird have?
The 1983 Triumph TR 6 Thunderbird has a Power of 42.0 HP (30.9 kW) @ 6500 RPM.
How many gears does the Triumph TR 6 Thunderbird have?
The 1983 Triumph TR 6 Thunderbird has a Gearbox of 5-speed.
How much does the Triumph TR 6 Thunderbird weigh?
The 1983 Triumph TR 6 Thunderbird has a Wet weight of 190.0 kg (418.9 pounds).
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