Triumph Bonneville 650 T120 (1971) vs Triumph Speed Twin 1200 RS (2025) vs Triumph Speed Twin 1200 (2025) vs Triumph Speed Triple (2009) vs Triumph Speed Twin 500 (1947-58) vs Triumph Bandit 350SS (T35SS) (1971)

Comparison technical specifications

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Make:	Triumph	Triumph	Triumph	Triumph	Triumph	Triumph
Model:	Bonneville 650 T120	Speed Twin 1200 RS	Speed Twin 1200	Speed Triple	Speed Twin 500	Bandit 350SS (T35SS)
Years:	1971	2025	2025	2009	1947-58	1971
Engine:	Four stroke, parallel twin, OHV	Four stoke, parallel twin, 270? crank, SOHC, 4 valve per cylinder	Four stoke, parallel twin, 270? crank, SOHC, 4 valve per cylinder	Four stroke, transverse three cylinder. DOHC, 4 valves per cylinder	Four stroke, parallel twin, OHV	Four stroke, parallel twin, DOHC, 2 valvews per cylinder, alloy
Capacity:	649 cc / 39.6 cu in	1198 cc / 73.1 cu-in	1198 cc / 73.1 cu-in	1050 cc / 64.07 cu-in	498 cc / 30.4 cub in.	349 cc / 21.3 cu in
Bore x Stroke:	71 x 82 mm	97.6 x 80 mm	97.6 x 80 mm	79 x 71.4 mm	63 x 80 mm	63 x 56 mm
Compression Ratio:	9.0:1	12.1:1	12.1:1	12.0:1	7.2:1	9.5:1
Cooling System:	Air cooled	Liquid cooled	Liquid cooled	Liquid-cooled	Air cooled	Air cooled
Induction:	2 x 30 mm Amal concentric carburetors	Multipoint sequential electronic fuel injection	Multipoint sequential electronic fuel injection	Multipoint sequential electronic fuel injection	Single Amal carburetor 15/16"	2 x 27 mm Amal carburetors
Starting:	Kick	Electric	Electric	Electric	Kick	Kick (electric starter option)
Clutch:	Multi-disc, wet	Wet, multi-plate slip & assist clutch	Wet, multi-plate slip & assist clutch	Wet, multi-plate	Wet,6 plate	Wet, multi-plate
Max Power:	37.3 kW / 50 hp @ 7000 rpm	77.2 kW / 103.5 hp @ 7750 rpm	77.2 kW / 103.5 hp @ 7750 rpm	94.9 Nm / 131 hp @ 9100 rpm	20.9 kW / 28 hp @ 6000 rpm	25 kW / 34 hp @ 9000 rpm
Transmission:	4 Speed	6-Speed	6-Speed	6 Speed	4 Speed, constant mesh	5-Speed
Final Drive:	Chain	Chain, X-ring	Chain, X-ring	Chain	Chain	Chain
Front Suspension:	Telescopic forks	43mm USD Marzocchi forks, adjustable for pre-load, compression and rebound damping	43mm USD Marzocchi forks	45 mm Upside down forks with dual rate springs and adjustable preload, compression and rebound damping	Hydraulic telescopic fork	Telescopic fork
Rear Suspension:	Swinging arm, dual shocks	Twin ?hlins RSUs with external reservoirs, adjustable for pre-load, compression and rebound	Twin Marzocchi RSUs with adjustable preload	Monoshock with adjustable preload, compression and rebound damping	1947-1954 sprung hub, after 1954 Swingarm with two shock absorbers	Twin shocks, coil springs
Front Brakes:	Drum	2 x 320 mm discs, Brembo Stylema M4.30 radial calipers	2 x 320 mm discs, Triumph branded four-piston radial calipers	2 x 320 mm Discs, 4 piston calipers	Drum, 7 in SLS	Drum, internal expanding
Rear Brakes:	Drum	Single 220 mm disc, Nissin 2-piston floating caliper	Single 220 mm disc, Nissin 2-piston floating caliper	Single 220 mm disc, 2 piston caliper	Drum, 7 in SLS	Drum, internal expanding
Front Tyre:	3.25 -19	120/70 ZR17	120/70 ZR17	120/70 ZR17	3.25 - 19, Dunlop Universal	3.25 x 18 Dunlop K70
Rear Tyre:	4.00 -18	160/60 ZR17	160/60 ZR17	190/50 ZR17	3.50 - 19, Dunlop Universal	3.50 x 18 Dunlop K70
Fuel Capacity:	16L / 4.2 US gal / 3.5 Imp gal	14.5 Litres / 3.8 US gal	14.5 Litres / 3.8 US gal	18 Litres / 4.89 gal	18 L / 4.8 US gal / 4.0 Imp gal	13.5 L / 3.6 US gal / 3.0 Imp gal