Triumph Bonneville T120 Diamond Edition - 2019 Specifications and Reviews

The 2019 Triumph Bonneville T120 Diamond Edition is a limited-production retro-modern cruiser designed for riders seeking classic styling with contemporary performance. This numbered collector's bike combines its iconic air-cooled parallel-twin engine with heritage aesthetics and modern conveniences like an LCD instrument display. Best suited to enthusiasts valuing exclusivity and timeless design, it delivers authentic British motorcycle character for both spirited riding and weekend cruises.

2019
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General information

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CategoryClassic
Year2019
ModelTriumph Bonneville T120 Diamond Edition

Engine and Transmission Specifications

Exhaust systemChromed 2 into 2 exhaust system with twin chrome silencers
Greenhouse gases104.4 CO2 g/km. (CO2 - Carbon dioxide emission)
Fuel consumption4.50 litres/100 km (22.2 km/l or 52.27 mpg)
DrivelineX ring chain. Primary drive: Gear.
ClutchWet, multi-plate assist clutch
Transmission typeChain   (final drive)
Gearbox6-speed
Cooling systemAir
IgnitionDigital-inductive type via engine management system
Fuel controlSingle Overhead Cams (SOHC)
Fuel systemInjection. Multipoint sequential electronic fuel injection with SAI
Valves per Cylinder4
Bore x Stroke97.6 x 80.0 mm (3.8 x 3.1 inches)
Compression10.0:1
Torque105.0 Nm (10.7 kgf-m or 77.4 ft.lbs) @ 3100 RPM
Power80.0 HP (58.4 kW) @ 6550 RPM
Engine typeTwin, four-stroke
Capacity:1200.0 ccm (73.22 cubic inches)
 
 

Brakes, suspension, Frame and wheels

WheelsWire spoked.
Rear brakesSingle disc. ABS. Nissin 2-piston floating caliper
Diameter310 mm (12.2 inches)
Front brakesSingle disc. ABS. Nissin 2-piston floating caliper
Rear tire150/70-R17
Front tire100/90-18
Rear wheel travel120 mm (4.7 inches)
Rear SuspensionKyb twin shocks with adjustable preload,
Front wheel travel120 mm (4.7 inches)
Front SuspensionKyb 41mm cartidge forks,
Trail105 mm (4.1 inches)
Rake (fork angle)25.5°
Frame typeTubular steel cradle. Twin-sided, tubular steel swing arm.
 
 

Physical measures and capacities

Oil capacity4.50 litres (4.76 US quarts)
Fuel capacity14.50 litres (3.83 US gallons)
Wheelbase1450 mm (57.1 inches)
Overall width785 mm (30.9 inches)
Overall length2230 mm (87.8 inches)
Overall height1100 mm (43.3 inches)
Seat height790 mm (31.1 inches) If adjustable, lowest setting.
Power/weight ratio0.3571 HP/kg
Dry weight224.0 kg (493.8 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Modifications compared to previous modelThe production run for the Bonneville T120 Diamond Edition is limited to 900, and comes with a numbered certificate, signed by Triumph Motorcycles CEO Nick Bloor; a collector’s item in itself.
Factory warranty24 months unlimited milage
InstrumentsLCD multi-functional instrument pack
StarterElectric
Color optionsWhite/Silver

Performance Profile & Rider Fit

80 hp
Peak Power
4.5s
0-60 mph

Best For

Track20%
City70%
Cornering60%
Daily Riding78%
Touring65%
Passenger65%

Rider Profile

Best ForSuits riders from confident beginners to experienced motorcyclists who want a classic-styled bike with modern, manageable power.
PurposeBuilt for relaxed retro-styled cruising, weekend rides, and everyday commuting rather than outright performance.
Rider FitA moderate seat height and manageable dry weight make it approachable for riders of average height and build, though its heft is noticeable at low speeds.
CharacterA refined, torque-rich classic parallel-twin that delivers smooth, gentlemanly power with timeless British styling and limited-edition exclusivity.
Not Ideal ForNot suited to riders seeking sharp sportbike performance, aggressive cornering ability, or any serious off-road capability.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2019 Triumph Bonneville T120 Diamond Edition Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 790mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2019 Triumph Bonneville T120 Diamond Edition, with a relaxed knee angle of around 120 degrees and a forward-leaning riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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Rider Reviews

Total comments: 1
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MotorcycleDB Review

The 2019 Triumph Bonneville T120 Diamond Edition motorcycle is a stunning and refined machine that combines classic style with modern performance. The diamond-inspired paint scheme and unique badging give this bike a luxurious and exclusive feel. The 1200cc engine delivers plenty of power and torque, making for a smooth and exhilarating ride. Whether you're cruising around town or hitting the open road, the T120 Diamond Edition offers a comfortable and enjoyable experience. With its premium features and elegant design, the 2019 Triumph Bonneville T120 Diamond Edition motorcycle is a standout in the modern classic motorcycle market. The attention to detail and craftsmanship is evident in every aspect of this bike, from the chrome accents to the leather seat. The T120 Diamond Edition is a true collector's item that will turn heads wherever you go. If you're in the market for a motorcycle that offers both style and substance, the T120 Diamond Edition is definitely worth considering.
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