Triumph T120 Bonneville 650 (1963-64) vs MV Agusta Brutale 675 (2014) vs Mash RoadStar 400 (2016-) vs Triumph 6T Thunderbird (1963-66)
Comparison technical specifications
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| Make: | Triumph | MV Agusta | Mash | Triumph |
| Model: | T120 Bonneville 650 | Brutale 675 | RoadStar 400 | 6T Thunderbird |
| Years: | 1963-64 | 2014 | 2016- | 1963-66 |
| Engine: | Four stroke, parallel twin, OHV | Four stroke, transverse three cylinder. DOHC, 4 Valve per cylinder | Four strike, single cylinder, SOHC, 4 valves | Four stroke, vertical twin, OHV |
| Capacity: | 649 cc / 39.6 cu in | 675 cc / 41.2 cu-in | 397 cc / 24.2 cu in | 649 cc / 40.0 cu in |
| Bore x Stroke: | 71 x 82 mm | 79 x 45.9 mm | 85 x 70 mm | 71 x 82 mm |
| Compression Ratio: | 8.5:1 | 12.0:1 | 8.8:1 | 8.5:1 |
| Cooling System: | Air cooled | Liquid cooled | Air cooled | Air cooled |
| Induction: | 2 x Amal 1 - 1/6" carburetors | Integrated ignition - injection system with three injectors Engine control unit Eldor EM2.0, throttle body full drive by wire Mikuni, pencil-coil with ion-sensing technology, control of detonation and misfire Torque control with four maps, Traction Control with eight levels of intervention | Siemens 2.0 EFI | Amal Monobloc |
| Starting: | Kick | Electric | Electric | Kick |
| Max Power: | 34 kW / 46 hp @ 6500 rpm | 84.5 kW / 113 hp @ 12500 rpm | 21.6 kW / 29 hp @ 7000 rpm | 31 kW / 42 hp @ 6500 rpm |
| Clutch: | Wet, multiplate | Wet, multiple discs, cable operated | Wet, multi-plate | Wet, multiplate |
| Transmission: | 4 Speed, constant mesh | 6 Speed | 5-Speed | 4-Speed constant mesh |
| Final Drive: | Chain, 106 links | Chain | Chain | Chain |
| Frame: | Single front downtube, second bracing member running under tank | ALS Steel tubular trellis, Rear swing arm pivot plates: material Aluminium alloy | Tubular steel frame | Brazed lug |
| Front Suspension: | Telescopic forks, hydraulic damping | 43mm“UPSIDE - telescopic hydraulic fork, | 35 mm Hydraulic fork, adjustable | Telescopic fork, 2 way hydraulic damping |
| Rear Suspension: | Swingarm, twin Girling dampers | Progressive, single shock absorber with spring preload adjustment | Dual-shock, adjustable preload | Swingarm, 2 hydraulic dampers |
| Front Brakes: | 8" SLS drum | 2x 320mm floating discs 4 pistons calipers | Single 280 mm disc, 2 piston caliper | SLS drum, 8 in |
| Rear Brakes: | 7" SLS drum | Single 220mm disc single piston caliper | Drum | SLS drum, 7 in |
| Seat Height: | 775 mm / 30.5 in | 812 mm / 31.9 in | 780 mm / 30.7 in | 825.5 mm / 32.5 in |
| Dry Weight: | 165 kg / 363 lbs | 163 kg / 358 lbs | 151 kg / 333 lbs | 165 kg / 363 lbs |