BMW R 100RT (1984) vs KTM 1090 Adventure R (2017) vs Harley-Davidson Harley Davidson XL 1200N Nightster (2009-10) vs BMW R 80GS (1988) vs BMW R 100GS Bubble Bee (1988)

Comparison technical specifications

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Make:	BMW	KTM	Harley-Davidson	BMW	BMW
Model:	R 100RT	1090 Adventure R	Harley Davidson XL 1200N Nightster	R 80GS	R 100GS Bubble Bee
Years:	1984	2017	2009-10	1988	1988
Engine:	Four stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder	Four stroke, 75°V-twin cylinder, DOHC, 4 valves per cylinder	Fur stroke, 45° V-Twin Evolution® Valve Train Pushrod-operated, OHV, 2 valves per cylinder	Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder	Four stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder
Capacity:	980 cc 59.8 cu in	1050 cc / 64.0 cu-in	1199 cc / 73.2 cu-in	797.5 cc / 48.7 cu in.	980 cc / 59.8 cu in.
Bore x Stroke:	94 x 70.6 mm	103 x 63 mm	88.8 x 96.8 mm	84.8 x 70.6 mm	94 x 70.6 mm
Cooling System:	Air cooled	Liquid cooling system, continuous circulation of cooling liquid with water pump	Air cooled	Air cooled	Air cooled
Compression Ratio:	9.5:1	-	9.7:1	8.2:1	8.5:1
Induction:	2 x Constant depression carburettors, Bing 94/40/105 - 94/40/106	EFI, ride by wire	Electronic Sequential Port Fuel Injection (ESPFI)	2 x Bing constant depression carburetors	2 x Bing carburetors
Ignition:	Battery ignition	Keihin EMS with RBW, twin ignition	Digital CDI	Battery ignition	Electronic ignition, Bosch
Starting:	Electric	Electric	Electric	Electric	Electric
Max Torque:	76 Nm / 7.7 kgf-m / 56 ft-lb @ 6000 rpm	109 Nm / 80.4 lb.-ft. @ 6500 rpm	107.3 Nm / 79 lb-ft @ 4000 rpm	61 Nm / 6.2 kgf-m / 44 ft lb @ 5000 rpm	76 Nm / 7.75 kgf-m / 56 ft-lb @ 3750 rpm
Clutch:	Dry single plate, with diaphragm spring	PASC (TM) slipper clutch, hydraulically actuated	Wet 9-plate	Dry single plate, with diaphragm spring	Dry single plate, with diaphragm spring
Transmission:	5 Speed	6 Speed	5 Speed	5 Speed	5 Speed
Final Drive:	Shaft	Chain X-Ring 5/8 x 5/16″	Belt	Shaft	Shaft
Frame:	Double sown tubs, dual cradle	Chromium-Molybdenum steel trellis frame, powder coated	Mild steel, tubular frame, circular sections, cast junctions Swingarm Mild steel rectangular tube sections, stamped junctions, MIG welded	Double loop tubular frame with bolt on rear section	Double loop tubular frame with bolt on rear section
Front Suspension:	Telescopic fork with hydraulic shock absorber.	48mm WP Suspension Up Side Down	39mm Forks	∅40mm Marzocchi telescopic hydraulic forks.	Telescopic fork with hydraulic shock absorber.
Rear Suspension:	Long swinging arm with adjustable strut.	WP-PDS Monoshock	Coil-over, dual-adjustable preload	BMW Paralever swinging arm	Paralever adjustable preload, rebound damping compression
Front Brakes:	2 x ∅260mm discs, 2 piston calipers	2x 320mm discs 4 piston calipers	Single 292mm disc 2 piston calipers	Single ∅285mm disc	Single ∅285mm disc, 2 piston caliper
Rear Brakes:	Simplex ∅200 mm drum	Single 267mm disc 2 piston caliper	Single 292mm disc 1 piston caliper	∅200mm Drum	∅200 Drum
Front Tyre:	3.25 H-19	90/90 R21 Continental TKC 80 Twinduro	100/90B19 57H	90/90 x 21S	90/90-21
Rear Tyre:	4.00 H-18	150/70 R18 Continental TKC 80 Twinduro	150/80B16 77H	13/80 x 17S	130/80-17
Wheelbase:	1465 mm / 57.67 in	1580 mm / 62.2 in	1519 mm / 59.8 in	1514 mm / 59.6 in	1514 mm / 59.6 in
Seat Height:	820 mm / 32.3 in	890 mm / 35.0 in	Laden 653 mm / 25.7 in Unladen 683 mm / 26.9 in	850 mm / 33.5 in	850 mm / 33.5 in
Ground Clearance:	165 mm / 6.49 in	250 mm / 9.8 in	100 mm / 4.7 in	200 mm / 7.87 in	200 mm / 7.9 in
Fuel Capacity:	24 Litres / 6.3 US gal	23 Litres / 6.08 gal	12.5 Litres / 3.3 US gal	24 L / 6.3 US gal	24 L / 6.3 US gal