The Ducati Monster 821 Stealth motorcycle specifications include a 821 cc (50.10 cu in) engine, power of 109 hp (79.6 kW) @ 9,250 rpm, a 6-speed gearbox, and a listed weight of 205 kg (451.9 lb).
Key specifications
The 2019 model is treated as the standard specification. Only later model years with a different supplied value are shown below.
How the Ducati Monster 821 Stealth compares
This compares the motorcycle with all Ducati models in this specifications database. The blue marker is this model and the grey line is the Ducati database average.
Very close to the Ducati database average. Around the 57th percentile across Ducati models.
About 6% lower than the Ducati database average. Around the 38th percentile across Ducati models.
Very close to the Ducati database average. Around the 54th percentile across Ducati models.
Very close to the Ducati database average. Around the 30th percentile across Ducati models.
Very close to the Ducati database average. Around the 53rd percentile across Ducati models.
Ducati database percentile rankings
Percentiles show where this motorcycle sits across the Ducati specifications database. They are descriptive database rankings, not performance ratings.
109 hp — more powerful than about 57% of Ducati models with power data.
821 cc — larger displacement than about 38% of Ducati models.
205 kg — heavier than about 54% of Ducati models, or lighter than about 46%.
785 mm — taller than about 30% of Ducati models.
16.5 L — larger than about 53% of Ducati fuel tanks in this database.
Dimensions compared with Ducati average
Each measurement is compared with the average value across Ducati models where that dimension is available.
2,170
2,131
Close to average.
800
823
Close to average.
1,055
1,124
6% below average.
1,480
1,474
Close to average.
785
808
Close to average.
Mechanical overview
Additional useful specifications
| Front tire size | 120/70-ZR17 |
|---|---|
| Rear tire size | 180/55-ZR17 |
| Power-to-weight ratio | 0.532 hp/kg |
| Power-to-weight | 531.7 hp/tonne |
| Specific power | 132.8 hp/L |
| Bore/stroke ratio | 1.30:1 (Oversquare) |
Engine specifications
| Engine type | V2, four-stroke |
|---|---|
| Displacement | 821 cc (50.10 cu in) |
| Power | 109 hp (79.6 kW) @ 9,250 rpm |
| Torque | 86.0 Nm (8.8 kgf-m or 63.4 ft.lbs) @ 7,750 rpm |
| Bore × stroke | 88.0 x 67.5 mm (3.5 x 2.7 inches) |
| Compression ratio | 12.8:1 |
| Valves per cylinder | 4 |
| Cooling system | Air |
| Fuel system | Injection. 53mm throttle bodies with full Ride by Wire |
| Fuel control | Desmodromic valve control |
| Starter | Electric |
Transmission and drivetrain
| Gearbox | 6-speed |
|---|---|
| Final drive | Chain (final drive) |
| Clutch | APTC slipper and self-servo wet multiplate clutch with control cable |
Chassis and suspension
| Frame | Tubular steel Trellis frame attached to the cylinders head |
|---|---|
| Front suspension | 43mm upside-down forks |
| Rear suspension | Progressive linkage with adjustable monoshock. Aluminium double-sided swingarm |
| Front wheel travel | 130 mm (5.1 inches) |
| Rear wheel travel | 140 mm (5.5 inches) |
| Rake | 24.3° |
| Trail | 93 mm (3.7 inches) |
Brakes, wheels and tires
| Front brakes | Double disc. Semi-floating discs, radially mounted Monobloc Brembo M4-32 callipers, 4-pistons, axiial pump with ABS as standard |
|---|---|
| Rear brakes | Single disc. 2-piston floating calliper with ABS as standard equipment |
| Front tire | 120/70-ZR17 |
| Rear tire | 180/55-ZR17 |
| Wheels | 10-spoke in light alloy. Pirelli Diablo Rosso II tyres. |
Dimensions and weight
| Wet weight | 205 kg (451.9 lb) |
|---|---|
| Dry weight | 180.5 kg (397.9 lb) |
| Seat height | 785 mm (30.9 inches) |
| Alternate seat height | 810 mm (31.9 inches) If adjustable, highest setting. |
| Overall length | 2,170 mm (85.4 inches) |
| Overall width | 800 mm (31.5 inches) |
| Overall height | 1,055 mm (41.5 inches) |
| Wheelbase | 1,480 mm (58.3 inches) |
Fuel and emissions
| Fuel capacity | 16.50 L (4.36 US gal) |
|---|---|
| Emission details | Euro 4 |
Performance
| Power/weight ratio | 0.6039 hp/kg |
|---|
Electrical and instruments
| Instruments | LCD display |
|---|
Other specifications
| Color options | Stealth |
|---|---|
| Seat | Dual seat |
| Exhaust system | Stainless steel muffler and aluminium and cap; lightweight 2-1 system with catalytic converter with 2 lambda probes |
| Factory warranty | 24 months unlimited mileage |
| Comments | Three Riding Modes. Traction Control. |
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Ducati models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Ducati information before relying on them. Visit the official Ducati website.