Built around Triumph's classic motorcycle platform, the 1977 Triumph T140 V Bonneville SIlver Jubilee pairs a 750 cc (45.8 cu in) air-cooled twin, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 45 HP (32.8 kW), transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 60 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the T140 V Bonneville SIlver Jubilee measures 190.5 kg (420 lbs) wet (curb), translating to a power-to-weight ratio of 0.24 HP/kg (4.23 kg per horsepower). Rider ergonomics and chassis geometry center around a 787 mm (31 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,422 mm (56 in) wheelbase engineered for balanced agility and highway composure. The 10.59-liter (2.8 US gal) fuel tank paired with a rated consumption of 4.7 L/100 km provides an estimated theoretical range of roughly 225 km (140 miles) between fill-ups, while factory top speed is listed at 177 km/h (110 mph).
Specific Output
60 HP/L
Power-to-Weight
0.24 HP/kg (4.23 kg/HP)
Theoretical Range
~225 km (140 mi)
Engine
Displacement750.0 ccm (45.77 cubic inches)
Engine TypeTwin, four-stroke
Engine DetailsTwin, four-stroke
Power45.0 HP (32.8 kW))
Compression7.9:1
Bore x Stroke76.0 x 82.0 mm (3.0 x 3.2 inches)
Valves/Cylinder2
Fuel SystemCarburettor. Twin 30mm Amal Concentric
Fuel ControlOverhead Valves (OHV)
IgnitionTwin Coil and Points
LubricationDry Sump
CoolingAir
Max RPM7200
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchWet multi-plate
Performance
Top Speed177.0 km/h (110.0 mph)
0-400m13.70 seconds
Fuel Consumption4.70 litres/100 km (21.3 km/l or 50.05 mpg)
Greenhouse Gases109.0 CO2 g/km. (CO2 - Carbon dioxide emission)
ExhaustTwin downswept with balance pipe, Dual silencers.
Chassis
Frame TypeTwin Downtube Cradle. Oil in frame.
Rake27.0°
Trail113 mm (4.4 inches)
Front SuspensionTelescopic slider type
Front Travel170 mm (6.7 inches)
Rear SuspensionTwin Girling Shocks on Swinging Arm
Rear Travel89 mm (3.5 inches)
Wheelbase1422 mm (56.0 inches)
Wheels & Brakes
Front Tyre3.25-19
Rear Tyre4.00-18
Front BrakesSingle disc. Twin piston caliper, Hard chromed cast iron disk
Front Brake Ø254 mm (10.0 inches)
Rear BrakesSingle disc. Twin piston caliper, Hard chromed cast iron disk
Rear Brake Ø254 mm (10.0 inches)
Dimensions & Weight
Dry Weight179.2 kg (395.0 pounds)
Weight incl.190.5 kg (420.0 pounds)
Power/Weight0.2512 HP/kg
Seat Height787 mm (31.0 inches) If adjustable, lowest setting.
Overall Length2223 mm (87.5 inches)
Overall Width838 mm (33.0 inches)
Fuel Capacity10.59 litres (2.80 US gallons)
Oil Capacity2.20 litres (2.32 US quarts)
Other
StarterKick
Color OptionsSilver With Red and Blue pinstriping.
Notes
I believe there was a USA and a Eureopean variant of this bike. The difference being: USA 2.8 gallon tank and high handlebars. Eureopean version had 4gall tank and low bars.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
