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)
Comparison technical specifications
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| Make: | Moto Guzzi | Harley-Davidson | BMW |
| Model: | MGX-21 Flying Fortress | Harley Davidson FLSTF/I Fat Boy | R 1200RT LC |
| Years: | 2016-17 | 2003-04 | 2017 |
| 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 |
| Capacity: | 1380 cc / 84.2 cu-in | 1449 cc / 88.4 cu-in | 1170, 71.4 co in |
| Bore x Stroke: | 104 x 81.2 mm | 95.3 x 101.6 mm | 101 x 73 mm |
| Cooling System: | Air/ oil cooled | Air cooled | Liquid cooled |
| Compression Ratio: | 10.5:1 | 8.9:1 | 12.5:1 |
| Ignition: | Phased electronic Multipoint sequential injection | Single-fire, non-wasted, map-controlled spark ignition | Digital engine management |
| Starting: | Electric | Electric | Electric |
| Max Power: | 96 hp / 71 kW @ 6500 rpm | 67 hp / 48.8 kW @ 5200 rpm | 92 kW / 125 hp @ 7750 rpm |
| Max Torque: | 89 ft/lb / 120 Nm @ 2750 rpm | 116.6 Nm / 86 lb-ft @ 3500rpm | 125 Nm / 12.7 kgf-m / 92 lb-ft @ 6500 rpm |
| Clutch: | Single-disc with integrated anti-vibration buffer | Wet 9-plate | Single disc dry clutch, hydraulically actuated |
| Transmission: | 6 speeds with final overdrive | 5 Speed | 6 Speed |
| Final Drive: | Shaft | Belt | Shaft |
| Gear Ratio: | 1st 17/38 = 1 : 2.235 2nd 20/34 = 1 : 1.700 3rd 23/31 = 1 : 1.348 4th 26/29 = 1 : 1.115 5th 31/30 = 1 : 0.968 6th 30/24 = 1 : 0.8 | 1st 10.110 2nd 6.958 3rd 4.953 4th 3.862 5th 3.150 | 1st 2.438 / 2nd 1.714 / 3rd 1.296 / 4th 1.059 / 5th 0.943 / 6th 0.848:1 |
| 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 |
| 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 |
| Front Wheel Travel: | 120 mm / 4.7 in | 130 mm / 5.1 in | 120 mm / 4.7 in |
| Rear Suspension: | Swingarm with double shock absorber with adjustable spring preload. | Hidden, horizontal-mounted, coil-over shock | BMW EVO Paralever |
| Rear Wheel Travel: | 110 mm / 4.3 in | 109 mm / 4.3 in | 136 mm / 5.4 in |
| 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 |
| 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 |
| Front Tyre: | 130/70 R18 | D402F MT90B16 72H | 120/70 ZR17 |
| Rear Tyre: | 200/60 R16 | D401 150/80B16 71H | 180/60 ZR17 |
| 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 |
| Wheelbase: | 1695 mm / 66.7 in | 1638 mm / 64.5 in | 1485 mm / 58.5 in |
| Seat Height: | 740 mm / 29.1 in | Laden2 645.2 mm / 25.4 in Unladen 698.5mm / 27.5 in | 805 mm / 31.5 in - 825 mm / 32.5 in (SA: 830mm / 850mm or 760mm / 780mm) |
| Fuel Capacity: | 20.5 Litres / 5.4 US gal | 18.9 Litres / 5.0 US gal | 25 Liters / US 6.6 gal |