Triumph T120 Bonneville 650 (1963-64) vs MV Agusta Brutale 675 (2014) vs Mash RoadStar 400 (2016-) vs Triumph 6T Thunderbird (1963-66) vs Vespa Primavera 50 Sean Wotherspoon (2020)

Comparison technical specifications

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Make:	Triumph	MV Agusta	Mash	Triumph	Vespa
Model:	T120 Bonneville 650	Brutale 675	RoadStar 400	6T Thunderbird	Primavera 50 Sean Wotherspoon
Years:	1963-64	2014	2016-	1963-66	2020
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	Four stroke, single cylinder, SOHC, 4 valve, catalytic converter
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	49 cc / 3 cub in
Bore x Stroke:	71 x 82 mm	79 x 45.9 mm	85 x 70 mm	71 x 82 mm	39 x 41.8 mm
Compression Ratio:	8.5:1	12.0:1	8.8:1	8.5:1	10.5:1
Cooling System:	Air cooled	Liquid cooled	Air cooled	Air cooled	Air cooled, forced
Starting:	Kick	Electric	Electric	Kick	Electric
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	3.0 kW / 4.1 hp
Clutch:	Wet, multiplate	Wet, multiple discs, cable operated	Wet, multi-plate	Wet, multiplate	Automatic, dry centrifugal with vibration dampers
Transmission:	4 Speed, constant mesh	6 Speed	5-Speed	4-Speed constant mesh	CVT
Final Drive:	Chain, 106 links	Chain	Chain	Chain	Belt
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	Sheet metal body with welded reinforcements
Front Suspension:	Telescopic forks, hydraulic damping	43mm“UPSIDE - telescopic hydraulic fork,	35 mm Hydraulic fork, adjustable	Telescopic fork, 2 way hydraulic damping	Single arm with coil spring and dual action mono shock absorber
Rear Suspension:	Swingarm, twin Girling dampers	Progressive, single shock absorber with spring preload adjustment	Dual-shock, adjustable preload	Swingarm, 2 hydraulic dampers	Hydraulic monoshock
Front Brakes:	8" SLS drum	2x 320mm floating discs 4 pistons calipers	Single 280 mm disc, 2 piston caliper	SLS drum, 8 in	Stainless steel disc, 200 mm, hydraulically operated
Rear Brakes:	7" SLS drum	Single 220mm disc single piston caliper	Drum	SLS drum, 7 in	Drum, 140 mm, mechanically operated
Seat Height:	775 mm / 30.5 in	812 mm / 31.9 in	780 mm / 30.7 in	825.5 mm / 32.5 in	780 mm / 30.7 in
Dry Weight:	165 kg / 363 lbs	163 kg / 358 lbs	151 kg / 333 lbs	165 kg / 363 lbs	115 kg / 254 lbs