Triumph 6T Thunderbird (1963-66) vs Kawasaki GPZ 305 (1984-) vs MV Agusta Brutale 1000RR (2020) vs MV Agusta F3 675 (2017-18) vs Triumph Trophy TR6C Special (1970)

Comparison technical specifications

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Make:	Triumph	Kawasaki	MV Agusta	MV Agusta	Triumph
Model:	6T Thunderbird	GPZ 305	Brutale 1000RR	F3 675	Trophy TR6C Special
Years:	1963-66	1984-	2020	2017-18	1970
Engine:	Four stroke, vertical twin, OHV	Four stroke Parallel twin, SOHC, 2 valves per cylinder	Four stroke, transverse four cylinder, DOHC, radial valves, 4 valves per cylinder	Four stroke, transverse three cylinder. DOHC, 4 Valve per cylinder,	Four stroke, parallel twin cylinder, OHV
Capacity:	649 cc / 40.0 cu in	306 cc / 18.7 cu-in	998 cc / 60.9 cu-in	675 cc / 41.1 cu-in	649 cc / 39.6 cu in
Bore x Stroke:	71 x 82 mm	61.0 x 52.4 mm	79 x 50.9 mm	79 x 45.9 mm	71 x 82 mm
Cooling System:	Air cooled	Air cooled	Cooling with separated liquid and oil radiators	Liquid Cooled	Air cooled
Compression Ratio:	8.5:1	9.7:1	13.4:1	13.0:1	8.5:1
Starting:	Kick	Electric	Electric	Electric	Electric
Max Power:	31 kW / 42 hp @ 6500 rpm	19.9 kW / 26.6 hp @ 10000 rpm	208 hp / 153 kW @ 13000 rpm	94.2 kW / 128 hp @ 14400 rpm	32.8 kW / 44.6 hp @ 6500 rpm
Clutch:	Wet, multiplate	Wet clutch	Wet, multi-disc with back torque limiting device and Brembo radial pump/lever assembly	Wet, multiple discs, cable operated	Wet, multi-plate, cable operated
Transmission:	4-Speed constant mesh	6 Speed	Cassette style, 6 speed, constant mesh	6 Speed	4 Speed constant mesh
Final Drive:	Chain	Belt	Chain	Chain	Chain, 106 links
Front Suspension:	Telescopic fork, 2 way hydraulic damping	Telescopic forks	43mm Öhlins Nix EC hydraulic “upside down” front forks with TiN superficial treatment, completely adjustable with electronically controlled compression and rebound damping with manually controlled spring preload	43mm “UPSIDE - telescopic hydraulic fork with rebound-compression damping and spring preload external and separate adjustment,	Telescopic fork, hydraulic damping
Rear Suspension:	Swingarm, 2 hydraulic dampers	Swing arm	Progressive, single shock absorber Öhlins EC TTX completely adjustable with electronically controlled compression and rebound damping and spring preload, aluminium alloy single sided swing arm	Progressive, single shock absorber with rebound and compression (High speed/ Low speed) damping and spring preload adjustment	Swingarm, 2 x Girling dampers
Front Brakes:	SLS drum, 8 in	2x disc	2x 320mm floating discs, Brembo Stylema radial-type 4 piston calipers	2x 320mm Double floating discs, 4 pistons calipers	SLS drum, full width, 8 in
Rear Brakes:	SLS drum, 7 in	Drum	Single 220mm disc, Brembo 2 pistons caliper	Single 220mm disc, single piston calipers	SLS drum, one-side, 7 in
Wheelbase:	1384 mm / 54.5 in	1355 mm / 53.3 in	1415 mm / 55.7 in	1380 mm / 54.3 in	1400 mm / 54.5 in
Seat Height:	825.5 mm / 32.5 in	784 mm / 30.8 in	845 mm / 33.27 in	805 mm / 31.6 in	825 mm / 32.5 in
Dry Weight:	165 kg / 363 lbs	147 kg / 324 lbs	186 kg / 410.06 lbs	173 kg / 381.4 lbs	173 kg / 380 lbs