Ducati 750GT (1974) vs Triumph TR6R 650 Trophy Sport (1968-) vs Ducati 848 (2009) vs Harley-Davidson Harley Davidson XL 1200R Sportster Roadster (2020) vs BMW R 1250GS Adventure (2020)

Comparison technical specifications

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Make:	Ducati	Triumph	Ducati	Harley-Davidson	BMW
Model:	750GT	TR6R 650 Trophy Sport	848	Harley Davidson XL 1200R Sportster Roadster	R 1250GS Adventure
Years:	1974	1968-	2009	2020	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.	Four stroke, two cylinder horizontally opposed Boxer, with two overhead, spur gear driven camshafts , a counterbalance shaft and variable intake camshaft control system BMW ShiftCam, 4 valves per cylinder, Intake 40mm, outlet 34 mm
Capacity:	748 cc / 45.6 cu-in	649 cc / 40 cu-in	848 cc / 51.7 cu in	1202 cc / 73.4 cub in.	1254 cc / 76.5 cu-in
Bore x Stroke:	80 x 74.4 mm	71 x 82 mm	94 x 61.2 mm	88.9 x 96.8 mm	102.5 x 76 mm
Compression Ratio:	8.5:1	9.0:1	12.0:1	10.0:1	12.5:1
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)	Electronic intake pipe injection, 52mm Ø throttle valve
Cooling System:	Air cooled	Air cooled	Liquid cooled	Air cooled	Liquid / Air cooled
Starting:	Kick	Electric	Electric	Electric	Electric 900W
Transmission:	5 Speed	4 Speed constant mesh	6 Speed	5 Speed	Constant mesh 6-speed gearbox with helical gearing system
Final Drive:	Chain	Chain	Chain	Belt	Shaft
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	BMW Motorrad 37mm Telelever, central spring strut
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	Cast aluminium single-sided swing arm with BMW Motorrad Paralever, WAD spring strut, continuously adjustable spring preload by means of hand wheel, rebound-stage damping adjustable by hand wheel (Option: Dynamic ESA)
Front Brakes:	Single 280mm disc	8 in Drum	2 x 320mm Disc, Brembo 4 piston calipers	2x 300mm floating discs, 2 piston caliper	2x 305mm floating discs, 4-piston radial brake calipers
Rear Brakes:	200 mm Drum	7 in Drum	Single 245 mm disc, Brembo 2 piston caliper	Single 292mm disc, 1 piston caliper	Single 276mm disc, 2-piston floating caliper
Front Tyre:	3.25-19	3.25 x 19	120/70 ZR17	120/70R19 M/C	120/70 R19
Rear Tyre:	3.50-18	4.00 x 18	180/50 ZR17	150/70R18 M/C	170/60 R17
Wheelbase:	1530 mm / 60.2 in	1397 mm / 55 in	1430 mm / 56.3 in	1505 / 59.3 in	1504 mm / 59.2 in
Seat Height:	780 mm / 30.7 in	793 mm / 31.2 in	830 mm / 32.6 in	Unladen 785 mm / 30.9in	890 mm to 910 mm / 35 in to 35.8 in 820 mm to 910 mm / 32 in to 35.8 in - possible
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	30 Litres / 7.9 US gal