Key performance

80 ch
Power
🔧
1200 cc
Displacement
⚖️
243 kg
Weight
🏎️
190 km/h
Top speed
💺
785 mm
Seat height
14.5 L
Fuel capacity
💰
13 200 €
New price
Compare the Triumph 1200 BONNEVILLE T 120 Diamond with: Choose a motorcycle →

Technical specifications

Engine

Displacement
1200 cc
Power
80.0 ch @ 6550 tr/min (58.8 kW)
Torque
104.9 Nm @ 3100 tr/min
Engine type
Bicylindre parallèle, 4 temps
Cooling
combiné air / eau
Compression ratio
10:1
Bore × stroke
97.6 x 80 mm
Valves/cylinder
4
Camshafts
1 ACT
Fuel system
Injection
Starter
électrique

Chassis

Frame
tubulaire en acier
Gearbox
boîte à 6 rapports
Final drive
Chaîne
Front suspension
Fourche téléhydraulique Ø 41 mm, déb : 120 mm
Rear suspension
2 amortisseurs latéraux, déb : 120 mm

Brakes

Front brakes
Freinage 2 disques Ø 310 mm, étrier 2 pistons
Rear brakes
Freinage 1 disque Ø 255 mm, étrier 2 pistons
Front tyre
100/90-18
Front tyre pressure
2.20 bar
Rear tyre
150/70-17
Rear tyre pressure
2.50 bar

Dimensions

Seat height
785.00 mm
Seat type
Selle biplaces
Fuel capacity
14.50 L
Weight
243.00 kg
Dry weight
224.00 kg
New price
13 200 €

Overview

Sixty years. That's the kind of milestone that deserves more than a cake and a few candles. Triumph therefore brought out the silverware — literally — to celebrate six decades of Bonneville with a limited edition of 900 units dubbed the Diamond. The figure is no accident: sixty years of production places a motorcycle in a category of its own, somewhere between founding myth and the definitive benchmark of the global neo-classic segment.

Triumph 1200 BONNEVILLE T 120 Diamond

The T120 Diamond distinguishes itself through calculated restraint. Where the fiftieth-anniversary Bonneville 865 T100 had dressed itself in a blue and orange that turned heads, this Diamond edition opts for a pearlescent white that lets the details speak rather than the raw colour. The greyed Union Jack on the tank, the chromed engine covers, the carefully executed badges and tank emblem: everything comes together as a coherent, grown-up package that speaks more to enthusiasts than to passers-by. A certificate signed by Nick Bloor, Triumph's CEO, accompanies each machine. It's the kind of attention that flatters the collector's ego and justifies, at least symbolically, the €13,200 asking price.

Beneath the elegant livery, nothing revolutionary — and that's perfectly fine. The 1,200 cc parallel twin delivers 80 horsepower at 6,550 rpm and, more importantly, 104.9 Nm of torque from as low as 3,100 rpm. It is this early torque that defines the character of the machine: a smooth, rounded, jerk-free power delivery that never requires chasing the rev counter to make genuine progress. Measured against a Royal Enfield Interceptor 650 or a Honda CB1100, the Bonneville operates in a different league of finish and onboard electronics, with its riding modes, ABS, traction control, and heated grips. At 243 kg fully fuelled, it is not the lightest of its generation, but the 785 mm seat height remains accessible for a rider of average build.

The tubular steel frame and suspension — a 41 mm fork up front and twin lateral shock absorbers with 120 mm of travel on each side — make no claim to sporting performance. There is no point seeking limit-pushing riding sensations from a machine conceived for open roads and brisk Sunday rides. The claimed top speed of 190 km/h is more than adequate, the six-speed gearbox is pleasant, and the chain final drive is entirely conventional. These are not shortcomings; they are a deliberate positioning that targets the over-forty enthusiast who values history, British aesthetics, and modern equipment dressed in period costume.

900 units, an immaculate white finish, chrome in all the right places, and a parallel twin that has never struck a false note. The Diamond does not reinvent the Bonneville — it celebrates it with the dignity that sixty years on the world's order books demands. For those seeking a motorcycle to live with as much as to admire, it is a compelling proposition, even if the price warrants careful consideration before signing the cheque.

Standard equipment

  • Assistance au freinage : ABS de série

Practical info

  • La moto est accessible aux permis : A
  • Fabriqué en 900 exemplaires

Indicators & positioning

Weight-to-power ratio
0.32 ch/kg
🔄
Torque / weight
0.43 Nm/kg
🔧
Volumetric power
65.8 ch/L
In category Classic · 600-2400cc displacement (1555 motorcycles compared)
Power 79 ch Top 28%
27 ch median 61 ch 109 ch
Weight 243 kg Lighter than 32%
190 kg median 226 kg 365 kg
P/W ratio 0.32 ch/kg Top 30%
0.10 median 0.28 0.50 ch/kg

Similar bikes

Frequently Asked Questions

Reviews & comments

No reviews yet. Be the first to share your opinion!