2027Triumph Bonneville T40 Black
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The 2027 Triumph Bonneville T40 Black is a lightweight retro roadster for newer riders who want classic Bonneville style without the bulk of the twins. Its 398cc liquid-cooled single makes 30 hp with a six-speed gearbox, a 790 mm seat and a 191 kg wet weight. It is best known as the smallest and most accessible Bonneville yet.
- Capacity
- 398.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 6-speed
- Wet weight
- 191.0 kg
- Seat height
- 790 mm
- Power
- 30.0 HP (22.8 kW) @ 7000 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Naked bike built for its class - everyday, practical use.
- Built for
- A naked bike from Triumph, built around a 398cc engine - a real production model, but this profile is formula-generated from its class and spec sheet rather than individually reviewed.
- Not ideal for
- Not for serious performance or off-road use.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 398.0 ccm
- Power
- 30.0 HP (22.8 kW) @ 7000 RPM
- Torque
- 36.0 Nm (3.7 kgf-m) @ 5000 RPM
- Engine type
- Single, four-stroke
- Emission details
- Euro 5+
- Power/weight ratio
- 0.1571 HP/kg (wet)
- Bore x stroke
- 89.0 x 64.0 mm
- Compression
- 12.0:1
- Cooling system
- Liquid
- Fuel system
- Bosch electronic fuel injection, electronic throttle control
- Valves per cylinder
- 4
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet, multi-plate, slip and assist
Dimensions & weight
- Wheelbase
- 1418 mm
- Overall width
- 818 mm
- Overall height
- 1081 mm
- Seat height
- 790 mm
- Wet weight
- 191.0 kg
- Fuel capacity
- 14.40 litres
- Dry weight
- Not on record - add it
Chassis & suspension
- Frame
- Hybrid spine/perimeter, tubular steel
- Front suspension
- Telescopic 43 mm forks
- Rear suspension
- Twin shocks, preload adjustable
- Front wheel travel
- 130 mm
- Rear wheel travel
- 130 mm
- Rake (fork angle)
- 25.4°
- Trail
- 100 mm
Brakes & wheels
- Front brakes
- Single disc, twin-piston axial caliper
- Front brakes diameter
- 310 mm
- Rear brakes
- Single disc, single-piston floating caliper
- Rear brakes diameter
- 255 mm
- ABS
- Yes
- Front tyre
- 100/90-18
- Front Wheel
- 18.0 in
- Rear tyre
- 150/70 R17
- Rear Wheel
- 17.0 in
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
Rider Reviews
Common questions
What is the engine size of the Triumph Bonneville T40 Black?
The 2027 Triumph Bonneville T40 Black has a Capacity of 398.0 ccm (24.29 cubic inches).
What engine power does the Triumph Bonneville T40 Black have?
The 2027 Triumph Bonneville T40 Black has a Power of 30.0 HP (22.8 kW) @ 7000 RPM.
How many gears does the Triumph Bonneville T40 Black have?
The 2027 Triumph Bonneville T40 Black has a Gearbox of 6-speed.
What is the torque of the Triumph Bonneville T40 Black?
The 2027 Triumph Bonneville T40 Black has a Torque of 36.0 Nm (3.7 kgf-m or 26.6 ft.lbs) @ 5000 RPM.
How much does the Triumph Bonneville T40 Black weigh?
The 2027 Triumph Bonneville T40 Black has a Wet weight of 191.0 kg (421.1 pounds).
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