Sport Tourers
1981Benelli 900 Sei
19 fields on record
The 1981 Benelli 900 Sei is a distinctive Italian classic powered by a rare 905cc inline-six engine producing 80 horsepower. Its smooth, refined character and compact dimensions make it ideal for riders seeking vintage sophistication and mechanical uniqueness. Best known for its engineering innovation and collectible status among enthusiasts of 1980s motorcycling heritage.
- Capacity
- 905.0 ccm
- Engine
- In-line six, four-stroke
- Gearbox
- 5-speed
- Wet weight
- 249.0 kg
- Seat height
- Not on record
Know it? Add it → - Power
- 80.0 HP (58.8 kW) @ 8300 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- It was built as a prestige grand-touring roadster, showcasing an exotic in-line six engine rather than chasing outright speed or agility.
- Built for
- The 900 Sei is a charismatic, smooth-running collector's classic prized for its unique engine sound and engineering rarity rather than aggressive handling.
- Not ideal for
- It is not suited for riders seeking modern sportbike agility, off-road capability, or high-speed track performance.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Engine
- Capacity
- 905.0 ccm
- Power
- 80.0 HP (58.8 kW) @ 8300 RPM
- Engine type
- In-line six, four-stroke
- Power/weight ratio
- 0.3213 HP/kg (wet)
- Bore x stroke
- 60.0 x 53.4 mm
- Compression
- 9.5:1
- 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
- 193.0 km/h (119.9 mph)
Dimensions & weight
Brakes & wheels
- Front brakes
- Dual disc
- Rear brakes
- Single disc
- Front tyre
- 100/90-18
- Rear tyre
- 120/90-18
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 | 1983 | 1985 | 1988 | 1990 |
|---|---|---|---|---|---|---|
| Capacity | 905 cc | 905 cc | 905 cc | 905 cc | 905 cc | 905 cc |
| Fuel capacity | 17 L | 17 L | 17 L | 17 L | 17 L | 17 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 Benelli 900 Sei?
The 1981 Benelli 900 Sei has a Capacity of 905.0 ccm (55.23 cubic inches).
What engine power does the Benelli 900 Sei have?
The 1981 Benelli 900 Sei has a Power of 80.0 HP (58.8 kW) @ 8300 RPM.
How many gears does the Benelli 900 Sei have?
The 1981 Benelli 900 Sei has a Gearbox of 5-speed.
How much does the Benelli 900 Sei weigh?
The 1981 Benelli 900 Sei has a Wet weight of 249.0 kg (549.0 pounds).
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