Aprilia AF1 Prototipo (1985) vs Ducati Streetfighter V4 (2021-22)
Comparison technical specifications
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| Make: | Aprilia | Ducati |
| Model: | AF1 Prototipo | Streetfighter V4 |
| Years: | 1985 | 2021-22 |
| Engine: | Two stroke, single cylinder | Four stroke, Desmosedici Stradale 90° V4, rearward-rotating crankshaft, 4 Desmodromically actuated valves per cylinder |
| Capacity: | 123 cc / 7.5 cu in | 1103 cc / 67.3 cu in |
| Bore x Stroke: | 54 x 54.5mm | 81 x 53.5 mm |
| Compression Ratio: | 15.5:1 | 14.0:1 |
| Cooling System: | Liquid cooled | Liquid cooled |
| Induction: | Dell'Orto carburetor, Ø 28 mm | Electronic fuel injection system. Twin injectors per cylinder. Full ride-by-wire elliptical throttle bodies |
| Max Power: | 18.7 kW / 25.1 hp @10000 rpm | 208 hp / 153 kW @ 12750 rpm |
| Max Torque: | 17.7 Nm / 1.8 kgf-m / 13.1 lb-ft @ 8000 rpm | 123 Nm / 90.4 lb-ft @ 11000 rpm |
| Transmission: | 6 Speed | 6 speed with Ducati Quick Shift (DQS) up/down EVO 2 |
| Final Drive: | Chain | Chain, front sprocket 15, rear sprocket 42 |
| Front Suspension: | Telescopic fork, 4-way anti-drive adjustable | Fully adjustable Showa BPF fork. 43 mm chromed inner tubes |
| Rear Suspension: | Sebac mono shock | Fully adjustable Sachs unit. Aluminum single-sided swingarm |
| Front Brakes: | Single Ø 260 mm disc | 2 x 330 mm semi-floating discs, radially mounted Brembo Monobloc Stylema® (M4.30) 4-piston callipers |
| Rear Brakes: | Single Ø 240mm disc | 245 mm disc, 2-piston calliper |
| Front Tyre: | 100/80-16 | Pirelli Diablo Rosso Corsa 2 120/70 ZR17 |
| Rear Tyre: | 120/80-16 | Pirelli Diablo Rosso Corsa 2 200/60 ZR17 |
| Dry Weight: | 120 kg / 265 lbs | 180kg / 397 lbs |
| Wet Weight: | 134.6 kg / 297 lbs | 200.9 kg / 443 lbs |
| Fuel Capacity: | 22.5 Litres / 5.9 US gal | 16 Litres / 4.23 US gal |