Built around Ducati's naked motorcycle platform, the 2020 Ducati Monster 821 Stealth pairs a 821 cc (50.1 cu in) liquid-cooled v2, four-stroke architecture with road-focused gearing. In factory specification, maximum torque reaches 86 Nm (63.4 lb-ft) at 7,750 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. Internal engine geometry specifies a bore and stroke of 88.0 x 67.5 mm (3.5 x 2.7 inches) with a 12.8:1 compression ratio.
On the scales, the Monster 821 Stealth measures 180.5 kg (398 lbs) dry. Rider ergonomics and chassis geometry center around a 785 mm (30.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,480 mm (58.3 in) wheelbase engineered for balanced agility and highway composure. The 16.5-liter (4.4 US gal) fuel tank paired with a rated consumption of 5.4 L/100 km provides an estimated theoretical range of roughly 306 km (190 miles) between fill-ups.
Theoretical Range
~306 km (190 mi)
Engine
Displacement821.0 ccm (50.10 cubic inches)
Engine TypeV2, four-stroke
Torque86.0 Nm (8.8 kgf-m or 63.4 ft.lbs) @ 7750 RPM
Compression12.8:1
Bore x Stroke88.0 x 67.5 mm (3.5 x 2.7 inches)
Valves/Cylinder4
Fuel SystemInjection. 53mm throttle bodies with full Ride by Wire
Fuel ControlDesmodromic valve control
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchAPTC slipper and self-servo wet multiplate clutch with control cable
Performance
Fuel Consumption5.40 litres/100 km (18.5 km/l or 43.56 mpg)
Chassis
Frame TypeTubular steel Trellis frame attached to the cylinders head
Trail93 mm (3.7 inches)
Front Suspension43mm upside-down forks
Front Travel130 mm (5.1 inches)
Rear SuspensionProgressive linkage with adjustable monoshock. Aluminium double-sided swingarm
Rear Travel140 mm (5.5 inches)
Wheelbase1480 mm (58.3 inches)
Wheels & Brakes
Front Tyre120/70-ZR17
Rear Tyre180/55-ZR17
Front BrakesDouble disc. Semi-floating discs, radially mounted Monobloc Brembo M4-32 callipers, 4-pistons, axiial pump with ABS as standard
Rear BrakesSingle disc. 2-piston floating calliper with ABS as standard equipment
Dimensions & Weight
Dry Weight180.5 kg (397.9 pounds)
Seat Height785 mm (30.9 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
