| General |
| Year | 2025 | 2024 |
| Model | Tuono 660 Factory | - |
| Make Model | Aprilia Tuono 660 Factory | Suzuki GSX-8R |
| Dimensions |
| Seat Height | 820 mm / 32.3 in | 810 mm / 31.9 in |
| Wheelbase | 1382 mm / 54.4 in | 146 mm / 57.7 in |
| Ground Clearance | - | 140 mm / 5.5 in |
| Weights & Capacities |
| Fuel Capacity | 15 Litres / 4.0 US gal | 14 Litres / 3.7 US gal |
| Wet Weight | 181 kg / 399 lbs | 205.2 kg / 452 lbs |
| Performance |
| Max Power | 105 HP (77.2 kW) @ 10400 rpm | 83.1 hp / 61.9 kW @ 8500 rpm |
| Max Torque | 70 Nm / 51.6 lb-ft @ 8400 rpm | 78 Nm / 57.5 lb-ft @ 6800 rpm |
| Engine |
| Displacement | 659 cc / 40.2 cu-in | 776 cc / 47.3 cu-in |
| Engine Detail | Four stroke, forward facing parallel twin, DOHC with silent chain drive on the right side, four valves per cylinder | Four stroke, parallel twin cylinder, DOHC, 4 valves per cylinder |
| Bore x Stroke | 81 x 63.93 mm | 84 x 70 mm |
| Compression Ratio | 13.5: 1 | 12.8:1 |
| Cooling System | Liquid cooled with radiator and water-oil heat exchanger | Liquid/oil cooled |
| Emissions | Euro 5 + | Euro 5 |
| Exhaust | Akrapovič - for race use only | Stainless-steel 2-into-1 exhaust system |
| Fuel Induction | Airbox with front air intake. 2 x 52 mm throttle bodies, Ride-By-Wire management | EFI with two 42mm throttle bodies |
| Lubrication | Wet sump | Wet sump |
| Starter | Electric | Electric |
| Drivetrain |
| Clutch | Wet, multi-plate, slipper | Wet multiplate with assist and slipper functions |
| Final Drive | Chain, with drive ratio: 17/43 | D.I.D O-ring chain |
| Transmission / Drive | 6-speed gearbox with Aprilia Quick Shift (AQS) up-and-down | 6-speed with quickshifter |
| Chassis |
| Frame Type | Twin-spar aluminum frame | Steel |
| Suspension - Front | 43mm Öhlins NIX 30 fork, spring preload, rebound and compression damping adjustable | 41mm Showa inverted fork, |
| Suspension - Rear | Öhlins monoshock, fully adjustable | Showa shock, Linkage-assisted, spring-preload adjustable |
| Rake | 24.3° | 25.0° |
| Trail | 104.1 mm / 4.1 in | 104 mm / 4.1 in |
| Wheel Travel - Front | 110 mm / 4.3 in | 130 mm / 5.1 in |
| Wheel Travel - Rear | 130 mm / 5.1 in | 130mm / 5.1 in |
| Electronics |
| Electronics Package | APRC suite with 6-axis inertial platform: AEM (engine maps), AEB (engine brake), ATC (traction control), AWC (wheelie control), ALC (Aprilia Launch Control), ACC (cruise control), Cornering ABS with 3 maps and rear wheel lift-up mitigation, 5 riding modes, and Aprilia Quick Shift (AQS) | - |
| Wheels & Brakes |
| Brakes - Front | Double 320 mm floating discs with Brembo radial calipers | 2 x 310mm floating discs with 4-piston Nissan calipers |
| Brakes - Rear | 220 mm disc with Brembo caliper | Single 240mm disc with single-piston Nissin caliper |
| ABS | ABS Cornering multimap | Standard |
| Tyres - Front | 120/70 ZR 17 | 120/70 x 17 |
| Tyres - Rear | 180/55 ZR 17 | 180/55 x 17 |
| Wheels | Aluminum alloy | Cast aluminum |
| Wheels - Front | 3.5 x17 | - |
| Wheels - Rear | 5.5 x17 | - |