Triumph 6T Thunderbird (1963-66) vs Kawasaki GPZ 305 (1984-) vs MV Agusta Brutale 1000RR (2020) vs MV Agusta F3 675 (2017-18)
Comparison technical specifications
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| Make: | Triumph | Kawasaki | MV Agusta | MV Agusta |
| Model: | 6T Thunderbird | GPZ 305 | Brutale 1000RR | F3 675 |
| Years: | 1963-66 | 1984- | 2020 | 2017-18 |
| 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, |
| 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 |
| Bore x Stroke: | 71 x 82 mm | 61.0 x 52.4 mm | 79 x 50.9 mm | 79 x 45.9 mm |
| Cooling System: | Air cooled | Air cooled | Cooling with separated liquid and oil radiators | Liquid Cooled |
| Compression Ratio: | 8.5:1 | 9.7:1 | 13.4:1 | 13.0:1 |
| Starting: | Kick | 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 |
| Clutch: | Wet, multiplate | Wet clutch | Wet, multi-disc with back torque limiting device and Brembo radial pump/lever assembly | Wet, multiple discs, cable operated |
| Transmission: | 4-Speed constant mesh | 6 Speed | Cassette style, 6 speed, constant mesh | 6 Speed |
| Final Drive: | Chain | Belt | Chain | Chain |
| 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, |
| 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 |
| 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 |
| Rear Brakes: | SLS drum, 7 in | Drum | Single 220mm disc, Brembo 2 pistons caliper | Single 220mm disc, single piston calipers |
| Wheelbase: | 1384 mm / 54.5 in | 1355 mm / 53.3 in | 1415 mm / 55.7 in | 1380 mm / 54.3 in |
| Seat Height: | 825.5 mm / 32.5 in | 784 mm / 30.8 in | 845 mm / 33.27 in | 805 mm / 31.6 in |
| Dry Weight: | 165 kg / 363 lbs | 147 kg / 324 lbs | 186 kg / 410.06 lbs | 173 kg / 381.4 lbs |