Triumph Speed Twin 500 (1947-58) vs Triumph Speed Triple 675R Carbon Limited Edition (2009) vs Harley-Davidson Harley Davidson FLHTCUTG Tri Glide Ultra Classic (2014) vs Triumph Trident T150 750 (1971)
Comparison technical specifications
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| Make: | Triumph | Triumph | Harley-Davidson | Triumph |
| Model: | Speed Twin 500 | Speed Triple 675R Carbon Limited Edition | Harley Davidson FLHTCUTG Tri Glide Ultra Classic | Trident T150 750 |
| Years: | 1947-58 | 2009 | 2014 | 1971 |
| Engine: | Four stroke, parallel twin, OHV | Four stroke, in-line 3-cylinder, DOHC, 12 valves | Four stroke, Twin Cam 103™ Valves Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters: two valves per cylinder | Tansverse three cylinder, pushrod OHV, 2 valves per cylinder |
| Capacity: | 498 cc / 30.4 cub in. | 675 cc / 41.19 cu-in | 1690 cc / 103.1 cub in. | 741 cc / 45.2 cu in |
| Bore x Stroke: | 63 x 80 mm | 74 x 52.3 mm | 98.4 x 111.1 mm | 67 x 70.5 mm |
| Compression Ratio: | 7.2:1 | 12.65:1 | 10.0:1 | 8.3:1 |
| Cooling System: | Air cooled | Liquid-cooled | Air/water cooled | Air cooled |
| Induction: | Single Amal carburetor 15/16" | Multipoint sequential electronic fuel injection with forced air induction | Electronic Sequential Port Fuel Injection (ESPFI) | 3 x 26 mm Amal MK1 carburetors |
| Ignition: | 6 V magnetic flywheel | Digital - inductive type | Single-fire, non-wasted, map-controlled spark ignition | Individual points & coils |
| Starting: | Kick | Electric | Electric | Kick |
| Transmission: | 4 Speed, constant mesh | 6 Speed | 6 Speed | 4 Speed, constant mesh (5-speed optional) |
| Final Drive: | Chain | O-ring chain | Belt | Chain |
| Frame: | Singe tube frame | Aluminium beam twin spar | Mild steel, square-section backbone with twin downtubes Swingarm Mild steel, rectangular tube sections with plate junctions; MIG welded | Single downtube, duplex cradle |
| Front Suspension: | Hydraulic telescopic fork | 41mm Kayaba upside down forks, with adjustable preload, rebound and compression damping, | 41.3 mm telescopic, triple-circuit damping, | Telescopic fork, hydraulic |
| Rear Suspension: | 1947-1954 sprung hub, after 1954 Swingarm with two shock absorbers | Kayaba monoshock with piggy back reservoir, adjustable for preload, rebound and compression damping, | Air-adjustable | Swingarm, dual shocks |
| Front Brakes: | Drum, 7 in SLS | 2 x 308mm Floating discs, Nissin4 piston radial calipers | 2 x 300mm disc, 4 piston caliper | Conical hub |
| Rear Brakes: | Drum, 7 in SLS | Single 220 mm disc, 1 piston caliper | 2 x 229mm disc, 1 piston caliper | 8 in TLS drum |
| Front Tyre: | 3.25 - 19, Dunlop Universal | 120/80 ZR17 | MT90B16 72H | 3.25-19, Dunlop K70 |
| Rear Tyre: | 3.50 - 19, Dunlop Universal | 180/55 ZR17 | 2x P205/65R15 | 4.10-19, Dunlop K70 |
| Fuel Capacity: | 18 L / 4.8 US gal / 4.0 Imp gal | 17.4 Litres / 4.6 US gal / 3.8 Imp gal | 22.7 Litres / 6.0 US gal | 19 L / 5.0 US gal / 4.2 Imp gal |