Moto Guzzi MGX-21 Flying Fortress (2016-17) vs Harley-Davidson Harley Davidson FLSTF/I Fat Boy (2003-04) vs BMW R 1200RT LC (2017) vs MV Agusta 125 Turismo GT (1970-73)

Comparison technical specifications

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Make:	Moto Guzzi	Harley-Davidson	BMW	MV Agusta
Model:	MGX-21 Flying Fortress	Harley Davidson FLSTF/I Fat Boy	R 1200RT LC	125 Turismo GT
Years:	2016-17	2003-04	2017	1970-73
Engine:	Four stroke, 90° V-twin, SOHC, 4 valves per cylinder	Four stroke, 45° V-Twin, Twin Cam 88® vibration isolation-mounted Valves Pushrod-operated overhead valves; w/ hydraulic self-adjusting lifters; two valves per cylinder	Four stroke, two cylinder horizontally opposed Boxer, DOHC, 4 valves per cylinder	Four stroke, single cylinder, pushrod, 2 valve
Capacity:	1380 cc / 84.2 cu-in	1449 cc / 88.4 cu-in	1170, 71.4 co in	123.5 cc / 7.5 cu-in
Bore x Stroke:	104 x 81.2 mm	95.3 x 101.6 mm	101 x 73 mm	53 x 56 mm
Cooling System:	Air/ oil cooled	Air cooled	Liquid cooled	Air cooled
Compression Ratio:	10.5:1	8.9:1	12.5:1	10.0:1
Ignition:	Phased electronic Multipoint sequential injection	Single-fire, non-wasted, map-controlled spark ignition	Digital engine management	Fywheel - magneto
Starting:	Electric	Electric	Electric	Kick
Max Power:	96 hp / 71 kW @ 6500 rpm	67 hp / 48.8 kW @ 5200 rpm	92 kW / 125 hp @ 7750 rpm	6.7 kW / 9 hp @ 6000 rpm
Clutch:	Single-disc with integrated anti-vibration buffer	Wet 9-plate	Single disc dry clutch, hydraulically actuated	Wet multiple plate clutch
Transmission:	6 speeds with final overdrive	5 Speed	6 Speed	5 Speed
Final Drive:	Shaft	Belt	Shaft	Chain
Frame:	Double cradle tubular frame in ALS steel with detachable rear subframe	Mild steel tubular frame; rectangular section backbone; stamped, cast and forged junctions; forged fender supports; MIG welded Swingarm Mild steel, rectangular tube sections, stamped junctions, MIG welded	Tubular steel frame, engine load-bearing	Open double cradle tubular and pressed steel
Front Suspension:	Standard swingarm, Ø 46 mm, with radial calliper mounting bracket and telescopes on the stanchions,	41.3 mm Telescopic forks with ”beer can” covers	BMW Telelever	Telescopic hydraulic fork
Rear Suspension:	Swingarm with double shock absorber with adjustable spring preload.	Hidden, horizontal-mounted, coil-over shock	BMW EVO Paralever	Swingarm with hydraulic shocks
Front Brakes:	2x 320 mm stainless steel floating discs, Brembo radial callipers with 4 horizontally opposed pistons	Single 292mm disc 4 piston caliper	2 x 320mm Discs, 4 piston callipers	158mm Drum
Rear Brakes:	Single 282 mm stainless steel fixed disc, Brembo floating calliper with 2 parallel pistons	Single 292mm disc 4 piston caliper	Single 276mm disc, 2 piston caliper	123mm Drum
Front Tyre:	130/70 R18	D402F MT90B16 72H	120/70 ZR17	2 75- 18
Rear Tyre:	200/60 R16	D401 150/80B16 71H	180/60 ZR17	2 75- 18
Dimensions:	Length 2445 mm / 90.2 in Width 940 mm / 37.0 in Height 1115 mm / 43.8 in	Length 2395.2 mm / 94.3 in	Length 2222 mm / 87.5 in Width 983 mm / 38.7 in Height 1417 mm / 55.7 in	Length 1920 mm / 75.5 in Width 640 mm / 25.1 in
Wheelbase:	1695 mm / 66.7 in	1638 mm / 64.5 in	1485 mm / 58.5 in	1280 mm / 50.3 in
Fuel Capacity:	20.5 Litres / 5.4 US gal	18.9 Litres / 5.0 US gal	25 Liters / US 6.6 gal	15 Litres / 3.9 US gal