Aprilia RS 660 (2020) vs Cagiva Elefant 650 (1985-86) vs BMW K 1300 S (2014)
Comparison technical specifications
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| Make: | Aprilia | Cagiva | BMW |
| Model: | RS 660 | Elefant 650 | K 1300 S |
| Years: | 2020 | 1985-86 | 2014 |
| Engine: | Four stroke, Forward facing parallel twin, DOHC with silent chain drive on the right side, four valves per cylinder. | Four stroke, 90° “L”twin cylinder, SOHC, desmodromic 2 valve per cylinder. | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder |
| Capacity: | 659 cc / 40.2 cu-in | 649 cc / 39.6 cu-in | 1298 cc / 79.2 cu in. |
| Bore x Stroke: | 81 x 63.93 mm | 82 x 61 mm | 80 x 64.3 mm / 3.15 x 2.53 in |
| Compression Ratio: | 13.5: 1 | 10.0:1 | 13.0:1 |
| Cooling System: | Liquid cooled with radiator and water-oil heat exchanger | Air cooled | Liquid cooled |
| Induction: | Airbox with front air intake. 2 ∅48 mm throttle bodies, Ride-By-Wire management | 2x 36mm Dell'Orto carburetors | Electronic fuel injection, Digital Motor Electronics with integrated knock control (BMS-K) |
| Starting: | Electric | Electric | Electric |
| Max Power: | 100 hp / 73.5 kW @ 10,500 rpm | 54 hp / 40 kW @ 8400 rpm | 127 kW / 173 hp @ 9250 rpm |
| Max Torque: | 67.0 Nm / 6.83 kgm @ 8,500 rpm | 54 Nm / 39.8 lb-ft @ 6200 rpm | 140 Nm / 14.3 kgf-m / 103 lb-ft @ 8250 rpm |
| Transmission: | 6 Speed, AQS Aprilia Quick Shift | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Shaft |
| Front Suspension: | Kayaba upside down fork ∅ 41 mm with counter spring, aluminium feet for fixing radial calipers. Adjustable for rebound, compression and spring preload. | Air adjustable forks 42mm tubes | BMW Motorrad Duolever, central spring strut, Paralever; central spring strut with lever system |
| Front Wheel Travel: | 120 mm / 4.7 in | 220 mm / 8.6 in | 115 mm / 4.5 in |
| Rear Suspension: | Aluminium swingarm with asymmetrical trusses. Monoshock with adjustable counter spring: rebound and spring preload. | Single shock absorber. adjustable for spring preload | Cast aluminium single swing arm with BMW Motorrad, spring pre-tension with infinite hydraulic adjustment |
| Front Brakes: | 2x 320mm Brembo radial calipers with 4 32mm opposing pistons. Radial pump and metal braided brake hose | Single 260mm disc 4 piston caliper | 2x 320mm discs, 4 piston calipers |
| Rear Brakes: | Single 220mm disc; Brembo calliper with 2 isolated ∅ 34mm pistons. Pump with integrated tank and metal braided hos | Single 240mm disc 2 piston caliper | Single 265mm disc, 2 piston caliper |
| Front Tyre: | 120/70 ZR 17 Tubeless radials | 90/90-21 | 120/70 ZR17 |
| Rear Tyre: | 180/55 ZR 17 (alternatively 180/60 ZR17) Tubeless radials | 130/90-17 | 190/55 ZR17 |
| Wheelbase: | 1370 mm / 53.9 in | 1520 mm / 59.8 in | 1585 mm / 62.4 in |
| Seat Height: | 815 mm / 32.0 in | 905 mm / 35.6 in | 820 mm/ 32.3 in - low seat 790 mm / 31.1 in |
| Dry Weight: | 169 kg / 372.5 lbs | 191 kg / 421 lbs | 228 kg / 503 lbs |
| Wet Weight: | 183 kg / 403.4 lbs | 208 kg / 458.6 lbs | 254 kg / 550 lbs |
| Fuel Capacity: | 15 Litres / 3.9 US gal | 17.5 Litres / 4.6 US gal | 19 Litres / 5.0 US gal |