| General |
| Year | 2025 | 2023 |
| Make Model | Aprilia Tuono 660 Factory | Triumph Street Triple RS |
| Dimensions |
| Seat Height | 822 mm / 32.3 in | 836 mm / 32.9 in |
| Wheelbase | 1382 mm / 54.4 in | 1399 mm / 55.0 in |
| Height | - | 1064 mm / 41.8 in |
| Length | - | 2052 mm / 80.7 in |
| Width | - | 792 mm /31.1 in |
| Weights & Capacities |
| Fuel Capacity | 15 Litres / 4.0 US gal | 15 Litres / 309 US gal |
| Wet Weight | 181 kg / 399 lbs | 188 kg / 414.4 lbs |
| Performance |
| Max Power | 105 hp / 73.5 kW @ 10500 rpm | 128.2 hp / 95.6 kW @ 12000 rpm |
| Max Torque | 68 NM / 50.2 lb-ft @ 8500 rpm | 80 Nm / 59 lb-ft @ 9500 rpm |
| Engine |
| Displacement | 659 cc / 40.2 cu-in | 765 cc / 46.6 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, In-line 3-cylinder, DOHC, 4 valve per cylinder |
| Bore x Stroke | 81 x 63.93 mm | 78 x 53.4 mm |
| Compression Ratio | 13.5: 1 | 13.25:1 |
| Cooling System | Liquid cooled with radiator and water-oil heat exchanger | Liquid-cooled |
| Emissions | Euro 5 + | Euro 5 |
| Exhaust | Akrapovič - for race use only | Stainless steel 3 into 1 header system with low single sided stainless steel silencer |
| Fuel Induction | Airbox with front air intake. 2 x 52 mm throttle bodies, Ride-By-Wire management | Multipoint sequential electronic fuel injection with electronic throttle control |
| Ignition | - | Digital - inductive type |
| Lubrication | Wet sump | Wet sump |
| Starter | Electric | Electric |
| Drivetrain |
| Clutch | Wet, multi-plate, slipper | Wet, multi-plate, slip & assist |
| Final Drive | Chain, with drive ratio: 17/43 | X-ring chain |
| Transmission / Drive | 6 Speed, Aprilia Quick Shift (AQS) System up and down (available as optional accessory) | 6 Speed with Triumph Shift Assist |
| Chassis |
| Frame Type | Twin-spar aluminum half frame | Aluminium beam twin spar frame with 2 piece high pressure die cast rear subframe |
| Suspension - Front | 43mm Öhlins NIX 30 fork, spring preload, rebound and compression damping adjustable | Showa 41 mm upside down Big Piston Forks (BPF), adjustable compression and rebound damping, and preload adjustment |
| Suspension - Rear | Öhlins STX rear shock, spring preload, rebound and compression damping adjustable | Öhlins STX40 piggyback reservoir monoshock, adjustable compression and rebound damping, and preload adjustment |
| Rake | 24.3° | 23.2° |
| Swingarm | - | Twin-sided, cast aluminium alloy |
| Trail | 104.1 mm / 4.1 in | 96.9 mm / 3.8 in |
| Wheel Travel - Front | 110 mm / 4.3 in | 115 mm / 4.5 in |
| Wheel Travel - Rear | 130 mm / 5.1 in | 131.2 mm / 5.2 in |
| Electronics |
| Electronics Package | APRC suite that includes ATC (traction control), AWC (wheelie control), AEB (engine brake) AEM (engine mapping), ACC (cruise control) 5 riding modes (Road and Track, 3 pre-set and 2 customizable) | - |
| Wheels & Brakes |
| Brakes - Front | 2x 320mm Brembo radial calipers with 4 horizontally opposed 32 mm pistons. Radial pump and metal braided brake hose | 2 x 310 mm floating discs, Brembo Stylema 4-piston radial monobloc calipers, OC-ABS, Brembo MCS radial master cylinder |
| Brakes - Rear | 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 220mm disc, Brembo single-piston caliper |
| ABS | ABS Cornering multimap | OC-ABS |
| Tyres - Front | 120/70 ZR 17 | 120/70 ZR17 |
| Tyres - Rear | 180/55 ZR 17 | 180/55 ZR17 |
| Wheels | Aluminum alloy | Cast aluminium alloy 5 spoke |
| Wheels - Front | 3.5 x17 | 3.5 x 17 |
| Wheels - Rear | 5.5 x17 | 5.5 x 17 |