Aprilia SRV 850 Maxi (2015) vs Aprilia SL 750 Shiver (2015-16) vs Aprilia SL 750 Shiver (2009) vs Aprilia RX50 (2013) vs Ariel Square Four 4G 1000, Mark I, Mark II (1936-48)

Comparison technical specifications

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Make:	Aprilia	Aprilia	Aprilia	Aprilia	Ariel
Model:	SRV 850 Maxi	SL 750 Shiver	SL 750 Shiver	RX50	Square Four 4G 1000, Mark I, Mark II
Years:	2015	2015-16	2009	2013	1936-48
Engine:	Four stroke, 90° V-twin, SOHC, 4 valves per cylinder	Four stroke, longitudinal 90°V twin, DOHC, 4 valves per cylinder	Four stroke, longitudinal 90°V twin, DOHC, 4 valves per cylinder	Single cylinder, two stroke	Four stroke, vertical square four, OHV, 8 valves
Capacity:	839.3 cc / 51.2 cu in	749 cc / 45.7 cu-in	749 cc / 45.7 cu-in	49.9 cc / 3.04 cu in	997 cc / 60.8 cu in
Bore x Stroke:	88 x 69 mm	92 x 56.4 mm	92 x 56.4 mm	39.9 x 40 mm	65 x 78 mm
Exhaust:	Two-into-one, Euro 4	Two in one system in 100% stainless steel with three-way catalytic converter and Lambda probe	Two in one system in 100% stainless steel with three-way catalytic converter and Lambda probe	Single, hich under seat	Mk I, Mk II: 2 x 2-into-1
Cooling System:	Liquid cooled with three-way thermostat	Liquid cooled	Liquid cooled	Liquid cooled	Air cooled
Induction:	Electronic injection with Ø38 mm single body	Integrated engine management system. Injection with Ride by Wire technology control of the throttle bodies	Integrated engine management system. Injection with Ride by Wire technology control of the throttle bodies	Dell'Orto PVHA 17.5 carburetor	SU carburetor
Starting:	Electric	Electric	Electric	Kick	Kick start
Transmission:	CVT with torque server	6 Speed	6 Speed	6 speed	4-Speed
Final Drive:	Belt	Chain Transmission ratio: 16/44	Chain Transmission ratio: 16/44	Chain	Chain
Frame:	Double cradle in high strength tubular steel	Dismountable steel trellis connected with high strength bolts to aluminium side plates. Dismountable rear frame.	Dismountable steel trellis connected with high strength bolts to aluminium side plates. Dismountable rear frame.	Steel beam	Single down tube
Front Suspension:	Ø41 mm Hydraulic telescopic fork with straight stanchions and set-back pin 122 mm wheel vertical travel)	Ø43 mm upside-down fork.	Ø43 mm upside-down fork.	Hydraulic fork, Ø 40 mm	Telescopic fork
Rear Suspension:	With laterally mounted, horizontal, hydraulic monoshock. Seven-position spring preload adjustment.	Aluminium alloy swingarm with reinforcement truss. Hydraulic shock absorber adjustable in spring preload and rebound damping.	Aluminium alloy swingarm with reinforcement truss. Hydraulic shock absorber adjustable in spring preload and rebound damping.	High strength steel swingarm, hydraulic monoshock	Plunger-link spring
Front Brakes:	2 x Ø300 mm semi-floating stainless steel discs with two Brembo double piston Ø28 mm floating calipers, ABS	2 x Ø320 mm discs, 4 piston caliper	2 x Ø320 mm discs, 4 piston caliper	Single stainless steel disc, Ø 260 mm, floating caliper	Drum
Rear Brakes:	Single Ø280 mm stainless steel disc and Ø25.4 mm double piston caliper, ABS	Single Ø245 mm disc, 2 piston caliper	Single Ø245 mm disc, 2 piston caliper	Single disc, Ø 180 mm, floating caliper	Drum
Dimensions:	Length: 2240 mm / 88.2 in Width: 800 mm / 31.5 in	Length 2100 mm / 89 in Width 800 mm / 31.8 in (at handlebars) Height 1135 mm / 44.6 in (at instruments)	Length 2100 mm / 89 in Width 800 mm / 31.8 i in (at handlebars) Height 1135 mm / 44.6 in (at instruments)	Length: 2100 mm / 82.7 in Width: 825 mm / 32.5 in	Length: 2100 mm / 82 in
Wheelbase:	1585 mm / 62.4 in	1440 mm / 56.7 in	1440 mm / 5.6 in	1412 mm / 55.6 in	1422 mm / 56 in
Fuel Capacity:	18.5 litres / 4.9 US gal	15 Litres / 3.9 US gal	15 Litres / 3.9 US gal	7 L / 1.85 US gal	23 L / 6.0 US gal