Aprilia Tuono 660 Factory (2025) vs Aprilia AF1 125 Sintesi Sport (1990) vs KTM 390 Duke (2024)
Comparison technical specifications
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| Make: | Aprilia | Aprilia | KTM |
| Model: | Tuono 660 Factory | AF1 125 Sintesi Sport | 390 Duke |
| Years: | 2025 | 1990 | 2024 |
| Engine: | Four stroke, forward facing parallel twin, DOHC with silent chain drive on the right side, four valves per cylinder | Two stroke, single cylinder, light alloy, barrel with Gilnisil coating | Four stroke, single cylinder, DOHC with finger followers, 4 valves |
| Capacity: | 659 cc / 40.2 cu-in | 124.7 cc / 7.6 cu in | 398.7 cc / 24.3 cu-in |
| Bore x Stroke: | 81 x 63.93 mm | 54 x 54.5 mm | 89 x 64 mm |
| Compression Ratio: | 13.5: 1 | 15.1:1 | |
| Cooling System: | Liquid cooled with radiator and water-oil heat exchanger | Liquid cooled | Liquid Cooled |
| Induction: | Airbox with front air intake. 2 x 52 mm throttle bodies, Ride-By-Wire management | Dell'Orto carburetor, Ø 28 mm | Bosch fuel injection |
| Starting: | Electric | Electric | Electric |
| Max Power: | 105 hp / 73.5 kW @ 10500 rpm | 21.4 kW / 28.66 hp @10500 rpm | 33 kW / 44.3 hp |
| Max Torque: | 68 NM / 50.2 lb-ft @ 8500 rpm | 18.6 Nm / 1.9 kgf-m / 13.7 lb-ft @ 10000 rpm | 39 Nm / 28.7 lb-ft |
| Transmission: | 6 Speed, Aprilia Quick Shift (AQS) System up and down (available as optional accessory) | 6 Speed | 6 Speed |
| Final Drive: | Chain, with drive ratio: 17/43 | Chain | Chain 520-X Ring |
| Front Suspension: | 43mm ?hlins NIX 30 fork, spring preload, rebound and compression damping adjustable | Telescopic fork, Ø 38 mm | 43mm WP APEX 43 |
| Front Wheel Travel: | 110 mm / 4.3 in | 120 mm / 4.7 in | 150 mm / 5.9 in |
| Rear Suspension: | ?hlins STX rear shock, spring preload, rebound and compression damping adjustable | Aprilia progressive mono shock system, Sebach | WP APEX - Monoshock |
| Rear Wheel Travel: | 130 mm / 5.1 in | 120 mm / 4.7 in | 150 mm / 5.9 in |
| Front Brakes: | 2x 320mm Brembo radial calipers with 4 horizontally opposed 32 mm pistons. Radial pump and metal braided brake hose | Single Ø 320 mm floating disc, 4 piston caliper, Brembo | Single 320 mm disc, 4 piston radial fixed caliper |
| Rear Brakes: | Single 220mm disc; Brembo caliper with two 34 mm separate pistons. Master cylinder with separate reservoir and metal braided hose Multimap ABS (Cornering ABS available as optional accessory) | Single Ø 240mm disc, 2 piston caliper | Single 240 mm disc, 2 piston floating caliper |
| Front Tyre: | 120/70 ZR 17 | 100/80-17 | |
| Rear Tyre: | 180/55 ZR 17 | 130/70-17 | |
| Seat Height: | 822 mm / 32.3 in | 800 mm / 31.5 in | 800/820 mm / 31.5/32.3 in |
| Fuel Capacity: | 15 Litres / 4.0 US gal | 20 Litres / 5.3 US gal |