Ducati Monster S4R (2005) vs Ducati Monster 821 (2017-18)
Comparison technical specifications
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| Make: | Ducati | Ducati |
| Model: | Monster S4R | Monster 821 |
| Years: | 2005 | 2017-18 |
| Engine: | Four stroke, 90° “L” twin cylinder, DOHC, desmodromic 4 valves per cylinder, belt driven | Four stroke, Testastretta 11° L-Twin, 4 Desmodromically actuated valves per cylinder |
| Capacity: | 996 cc / 60.8 cu in | 821 cc / 50.1 cu-in |
| Bore x Stroke: | 96 x 68.8 mm | 88 x 67.5 mm |
| Cooling System: | Liquid cooled | Liquid cooled |
| Compression Ratio: | 11.6:1 | 12.8:1 |
| Exhaust: | 2 x Aluminium mufflers with 3-way catalytic converter (non-catalytic on USA version) | Stainless steel muffler and aluminium and cap; lightweight 2-1 system with catalytic converter with 2 lambda probes |
| Induction: | Marelli electronic fuel injection, 50 mm throttle bodies | Electronic fuel injection system, 53mm throttle bodies with full Ride by Wire |
| Ignition: | Analogue CDI (Capacitive Discharge Ignition) | Marelli electronic |
| Starting: | Electric | Electric |
| Max Power: | 83.4 kW / 113 hp @ 8750 rpm | 80 kW / 109 hp @ 9250 rpm |
| Max Torque: | 95.5 Nm / 9.6 kgf-m / 70.4 ft-lb @ 7000 rpm | 86 Nm / 9.1 kgf-m / 63 lb-ft @ 7750 rpm |
| Clutch: | Dry multiplate with hydraulic control | Slipper and self-servo wet multiplate clutch with mechanical control |
| Transmission: | 6 Speed | 6 Speed |
| Final Drive: | Chain; front sprocket 15; rear sprocket 42 | Chain, Front sprocket 15; Rear sprocket 46 |
| Gear Ratio: | 1st 37/15, 2nd 30/17, 3rd 27/20, 4th 24/22, 5th 23/24, 6th 24/28 | 1st 37/15 2nd 30/17 3rd 28/20 4th 26/22 5th 24/23 6th 23/24 |
| Frame: | Tubular steel trellis | Tubular steel Trellis frame attached to the cylinders head |
| Front Suspension: | Showa upside-down fully adjustable 43 mm fork. | Kayaba 43mm upside-down fork |
| Front Wheel Travel: | 130 mm / 5.1 in | 130 mm / 5.1 in |
| Rear Suspension: | Progressive linkage with Showa fully adjustable monoshock with piggy back. Aluminium single armed swing-arm. | Progressive linkage with adjustable monoshock. Aluminum double-sided swingarm |
| Rear Wheel Travel: | 148 mm / 5.8 in | 140 mm / 5.5 in |
| Front Brakes: | 2 x 320 mm Discs, 4 piston calipers | 2 x 320 mm semi-floating discs, radially mounted Monobloc Brembo M4-32 callipers, 4-pistons, axial pump with ABS as standard equipment |
| Rear Brakes: | Single 245 mm disc, 2 piston caliper | Single 245 mm disc, 2-piston floating calliper with ABS as standard equipment |
| Front Tyre: | 120/70 - ZR17 | 120/70 ZR 17 Pirelli Diablo Rosso III |
| Rear Tyre: | 180/55 - ZR17 | 180/55 ZR17 Pirelli Diablo Rosso III |
| Rake: | 24° | 24.3° |
| Trail: | 96 mm / 3.8 in | 93.2mm / 3.7in |
| Wheelbase: | 1440 mm / 56.7 in | 1480 mm / 58.3 in |
| Seat Height: | 806 mm / 31.7 in | 785 mm - 810 mm / 30.9 in - 31.9 in |
| Dry Weight: | 193 kg / 425lbs | 180.5 kg / 398 lbs |
| Fuel Capacity: | 15 L / 4.0 US gal / 3.3 Imp gal | 16.5 Litres / 4.36 US gal |