| General |
| Year | 2022 | 2023 |
| Model | Tuareg 660 | - |
| Make Model | Aprilia Tuareg 660 | KTM 790 Adventure |
| Dimensions |
| Seat Height (in.) | 33.85 | - |
| Length (mm) | 2220 | - |
| Length (in.) | 87.4 | - |
| Height (mm) | 1140 | - |
| Seat Height (mm) | 860 | - |
| Wheelbase (in.) | 60.03 | - |
| Wheelbase (mm) | 1525 | - |
| Width (in.) | 38.0 | - |
| Width (mm) | 965 | - |
| Height (in.) | 44.9 | - |
| Seat Height | 860 mm / 33.8 in | 840 mm - 860 mm / 33.0 in - 33.8 in |
| Wheelbase | 1525 mm / 60.03 in | 1509 mm ± 15 mm / 59.4 ± 0.6 in |
| Ground Clearance | 240 mm / 9.5 in | 233 mm / 9.2 in |
| Height | 1140 mm / 44.9 in | - |
| Length | 2220 mm / 87.4 in | - |
| Width | 965 mm / 38.0 in | - |
| Weights & Capacities |
| Wet Weight (kg) | 204 | - |
| Wet Weight (lbs.) | 449.7 | - |
| Fuel Capacity (gal.) | 4.76 | - |
| Fuel Capacity (l) | 18 | - |
| Dry Weight (lbs.) | 412.2 | - |
| Dry Weight | 187 kg / 412 lbs | 199 kg / 438.7 lbs |
| Fuel Capacity | 18 Litres / 4.7 US gal | 20 Litres / 5.3 US gal |
| Wet Weight | 204 kg / 450 lbs | - |
| Performance |
| Max Power | 79 hp / 59 kW @ 9250 rpm | 95hp / 70.8 kW |
| Max Torque | 70 Nm / 51.63 lb-ft @ 6500 rpm | 87 Nm / 64.1 lb-ft |
| Engine |
| Bore x Stroke (in,) | 3.19 x 2.52 in | - |
| Bore x Stroke (mm) | 81 x 63.93 mm | - |
| Fuel Reserve (l) | 3 | - |
| Displacement (ci) | 40.2 | - |
| Displacement (cc) | 659 | - |
| Engine Type | Four-stroke, forward-facing parallel twin, DOHC, four valves per cylinder | - |
| Fuel Reserve (gal.) | 0.79 | - |
| Displacement | 659 cc / 40.2 cu-in | 799 cc / 48.7 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 valve per cylinder |
| Bore x Stroke | 81 x 63.93 mm | 88 mm x 65.7 mm |
| Cooling System | Liquid cooled | Liquid cooled |
| Emissions | Euro 5 | Euro 5 |
| Engine Management | Aprilia APRC electronic management with ride-by-wire, traction control, engine maps, engine brake control and cruise control | Bosch EMS with RBW |
| Engine Maps / Power Modes | Four riding modes: two preset and two customisable | - |
| Exhaust | - | Stainless steel primary and secondary silencer |
| Fuel Consumption | 4.0 L/100 km / 58.8 US mpg (claimed) | - |
| Fuel Induction | Airbox with front air intake, two 48 mm throttle bodies, electronic fuel injection and ride-by-wire | DKK Dell'Orto, 46 mm Throttle Body |
| Ignition | Electronic ignition | - |
| Lubrication | Wet sump | Forced oil lubrication with 2 oil pumps |
| Starter | Electric | Electric |
| Drivetrain |
| Clutch | Wet, multi-plate, slipper | PASC (Power Assisted Slipper Clutch) antihopping clutch, mechanically operated |
| Final Drive | Chain, with drive ratio: 17/43 | Chain 520 X-Ring |
| Gearbox | 6-speed gearbox | - |
| Transmission / Drive | 6 Speed, AQS Aprilia Quick Shift available | 6 Speed |
| Chassis |
| Trail (mm) | 113.3 | - |
| Wheel Travel - Front (in.) | 9.45 | - |
| Wheel Travel - Front (mm) | 240 | - |
| Wheel Travel - Rear (in.) | 9.45 | - |
| Wheel Travel - Rear (mm) | 240 | - |
| Fork Tube Size (mm) | 43 | - |
| Fork Tube Size (in.) | 1.69 | - |
| Trail (in.) | 4.46 | - |
| Frame Type | Steel tubular trellis frame with aluminium engine connection plates and integrated subframe | Chromium-Molybdenum-Steel frame using the engine as stressed element, powder coated |
| Suspension - Front | Fully adjustable 43 mm Kayaba upside-down fork with top-out spring | WP APEX 43 |
| Suspension - Rear | Aluminium swingarm, fully adjustable Kayaba monoshock with progressive linkage | WP APEX - Monoshock |
| Rake | 26.7 degrees | - |
| Steering Head Angle | - | 64.1° |
| Trail | 113.3 mm / 4.46 in | - |
| Wheel Travel - Front | 240 mm / 9.45 in | 200 mm / 7.9 in |
| Wheel Travel - Rear | 240 mm / 9.45 in | 200 mm / 7.9 in |
| Electronics |
| Electronics Package | 4 Riding modes, APRC with traction control, engine maps, engine brake control and cruise control | - |
| Wheels & Brakes |
| Brakes - Rear Diameter (mm) | 260 mm | - |
| Brakes - Rear Diameter (in.) | 10.24 in | - |
| Brakes - Front Diameter (mm) | 300 mm | - |
| Brakes - Front Diameter (in.) | 11.81 in | - |
| Brakes - Front | 2 x 300 mm floating discs, Brembo calipers with opposed 30/32 mm pistons | 2x 320mm discs, 2x radially mounted 4 piston caliper |
| Brakes - Rear | Single 260 mm disc, Brembo single-piston caliper | Single 260mm disc, 2 piston floating caliper |
| ABS | Multi-map ABS, adjustable intervention levels | Bosch 9.3 MP (incl. Cornering-ABS and off-road mode, disengageable) |
| Tyres - Front | 90/90-21 tubeless | 90/90-21 |
| Tyres - Rear | 150/70 R18 tubeless | 150/70-18 |
| Wheels | Cross-spoke wheels | - |
| Wheels - Front | Spoked front wheel, 2.15 x 21 in, aluminium rim | 2.50 x 21 |
| Wheels - Rear | Spoked rear wheel, 4.25 x 18 in, aluminium rim | 4.50 x 18 |