Ducati 750GT (1974) vs Triumph TR6R 650 Trophy Sport (1968-) vs Ducati 848 (2009) vs Harley-Davidson Harley Davidson XL 1200R Sportster Roadster (2020)
Comparison technical specifications
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| Make: | Ducati | Triumph | Ducati | Harley-Davidson |
| Model: | 750GT | TR6R 650 Trophy Sport | 848 | Harley Davidson XL 1200R Sportster Roadster |
| Years: | 1974 | 1968- | 2009 | 2020 |
| Engine: | Four stroke, 90°“L”twin cylinder, SOHC, 2 valves per cylinder, bevel gear driven | Four stroke, parallel twin cylinder, OHV | Four stroke, 90°“L”twin cylinder, DOHC, desmodromic 4 valves per cylinder. | Four stroke, 45° V-Twin, OHV, 2 valves per cylinder. |
| Capacity: | 748 cc / 45.6 cu-in | 649 cc / 40 cu-in | 848 cc / 51.7 cu in | 1202 cc / 73.4 cub in. |
| Bore x Stroke: | 80 x 74.4 mm | 71 x 82 mm | 94 x 61.2 mm | 88.9 x 96.8 mm |
| Compression Ratio: | 8.5:1 | 9.0:1 | 12.0:1 | 10.0:1 |
| Induction: | 2 x 30mm Amal R 930/76 | 30 mm Amal concentric carburetor | Marelli electronic fuel injection, elliptical throttle bodies | Electronic Sequential Port Fuel Injection (ESPFI) |
| Cooling System: | Air cooled | Air cooled | Liquid cooled | Air cooled |
| Ignition: | Points and coil | Battery and coil | Digital CDI | Digital CDI |
| Starting: | Kick | Electric | Electric | Electric |
| Transmission: | 5 Speed | 4 Speed constant mesh | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Chain | Belt |
| Front Suspension: | 38 mm Marzocchi fork From 1974: Ceriani fork | Telescopic fork, hydraulic damping | Showa 43mm fully adjustable upside-down fork | 43 mm inverted front forks with premium cartridge dampening technology and triple clamp design |
| Rear Suspension: | Dual shocks, Marzocchi 305 mm, 3-way adjustable | Swingarm, 2 x Girling dampers | Progressive linkage with fully adjustable Showa monoshock. Aluminium single-sided swingarm. | Premium emulsion technology rear shocks with screw style pre-load adjustment |
| Front Brakes: | Single 280mm disc | 8 in Drum | 2 x 320mm Disc, Brembo 4 piston calipers | 2x 300mm floating discs, 2 piston caliper |
| Rear Brakes: | 200 mm Drum | 7 in Drum | Single 245 mm disc, Brembo 2 piston caliper | Single 292mm disc, 1 piston caliper |
| Front Tyre: | 3.25-19 | 3.25 x 19 | 120/70 ZR17 | 120/70R19 M/C |
| Rear Tyre: | 3.50-18 | 4.00 x 18 | 180/50 ZR17 | 150/70R18 M/C |
| Wheelbase: | 1530 mm / 60.2 in | 1397 mm / 55 in | 1430 mm / 56.3 in | 1505 / 59.3 in |
| Seat Height: | 780 mm / 30.7 in | 793 mm / 31.2 in | 830 mm / 32.6 in | Unladen 785 mm / 30.9in |
| Fuel Capacity: | 17 Litres / 4.5 US gal | 13.2 Litres / 3.5 US gal | 16 Litres / 4.2 US gal / 3.5 Imp gal | 12.5 Litres / 3.3 US gal |