Triumph T120 Bonneville 650 (1960-61) vs Triumph Bonneville 750 T140V (1973-74)
Comparison technical specifications
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| Make: | Triumph | Triumph |
| Model: | T120 Bonneville 650 | Bonneville 750 T140V |
| Years: | 1960-61 | 1973-74 |
| Engine: | Four stroke, parallel twin, OHV | Four stroke, parallel twin, OHV, 2 valves per cylinder |
| Capacity: | 649 cc / 39.6 cu in | 744 cc / 45.4 cu in |
| Bore x Stroke: | 71 x 82 mm | 76 x 82 mm |
| Compression Ratio: | 8.5:1 | 7.9:1 |
| Cooling System: | Air cooled | Air cooled |
| Induction: | 2 x Amal 1 - 1/6" carburetors | 2 x 30 mm Amal carburetors |
| Ignition: | Lucas magneto | Battery / dual coil / dual points / Lucas |
| Starting: | Kick | Kick |
| Max Power: | 34 kW / 46 hp @ 6700 rpm | 40.3 kW / 54 hp @ 5000 rpm |
| Clutch: | Wet, multiplate | Wet, multiplate |
| Transmission: | 4 Speed, constant mesh | 5 Speed |
| Final Drive: | Chain, 101 links | Chain, 106 links |
| Gear Ratios: | 1st 11.90 / 2nd 8.25 / 3rd 5.81 / 4th 4.88:1 | 1st 12.25 / 2nd 8.63 / 3rd 6.58 / 4th 5.59 / 5th 4.70:1 |
| Frame: | Twin steel downtubes | Tubular steel, double front downtubes, oil bearing large tube backbone |
| Front Suspension: | Telescopic forks, hydraulic damping | Telescopic forks |
| Rear Suspension: | Swingarm, twin Girling dampers | Swingarm, Girling shocks, 3-way spring preload adjustable |
| Front Brakes: | 8" SLS drum | Single 254 mm disc, 1 piston caliper |
| Rear Brakes: | 7" SLS drum | Single 254 mm disc, 1 piston caliper |
| Front Tyre: | 3.25 x 19, Dunlop | 3.25-19 |
| Rear Tyre: | 4.00 x 18, Dunlop | 4.00-18 |
| Wheelbase: | 1400 mm / 55.25 in | 1448 mm / 57 in |
| Seat Height: | 770 mm / 30.5 in | 820 mm / 32.3 in |
| Dry Weight: | 183 kg / 403 lbs | 198 kg / 414 lbs |
| Fuel Capacity: | US: 13.6 L / 3.6 US gal / 3 Imp gal / UK and other Export: 18 L / 4.8 US gal / 4 Imp gal | 12 Litres / 3.2 US gal / 2.6 Imp gal |