Naked Motorcycles
1981Triumph T 140 E Bonneville
19 fields on record
The 1981 Triumph T140E Bonneville is a classic British twin-cylinder roadster suited to riders seeking authentic vintage performance and style. Known for its reliable air-cooled engine and distinctive parallel-twin character, it delivers accessible power with genuine retro appeal. Its 744cc engine and 5-speed transmission make it ideal for everyday riding and long-distance cruising.
- Capacity
- 744.0 ccm
- Engine
- Parallel Twin, four-stroke
- Gearbox
- 5-speed
- Wet weight
- 206.0 kg
- Seat height
- Not on record
Know it? Add it → - Power
- 49.0 HP (36.0 kW) @ 6500 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built as a traditional air-cooled roadster for spirited weekend rides and short trips rather than serious distance touring or track work.
- Built for
- Delivers old-school vibration, mechanical character, and a raw connection to the road that modern bikes rarely offer.
- Not ideal for
- Not the right choice for riders seeking modern performance, long-haul comfort, or 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
- 744.0 ccm
- Power
- 49.0 HP (36.0 kW) @ 6500 RPM
- Engine type
- Parallel Twin, four-stroke
- Power/weight ratio
- 0.2379 HP/kg (wet)
- Bore x stroke
- 76.0 x 82.0 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
- 176.0 km/h (109.4 mph)
Dimensions & weight
Brakes & wheels
- Front brakes
- Single disc
- Rear brakes
- Single disc
- Front tyre
- 4.10-19
- Rear tyre
- 4.10-18
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 | 1980 | 1981 | 1982 | 1983 |
|---|---|---|---|---|
| Capacity | 744 cc | 744 cc | 744 cc | 744 cc |
| Fuel capacity | 18.5 L | 18.5 L | 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 T 140 E Bonneville?
The 1981 Triumph T 140 E Bonneville has a Capacity of 744.0 ccm (45.40 cubic inches).
What engine power does the Triumph T 140 E Bonneville have?
The 1981 Triumph T 140 E Bonneville has a Power of 49.0 HP (36.0 kW) @ 6500 RPM.
How many gears does the Triumph T 140 E Bonneville have?
The 1981 Triumph T 140 E Bonneville has a Gearbox of 5-speed.
How much does the Triumph T 140 E Bonneville weigh?
The 1981 Triumph T 140 E Bonneville has a Wet weight of 206.0 kg (454.2 pounds).
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