Bobcat 643 vs Bobcat S66

Specification	Bobcat 643Skid Steers	Bobcat S66Skid Steers
Type	Skid steer	Skid steer
Lift Design	Radial	Vertical
Years Made	1981-1986	2020-2022
Horsepower	21.3 kW (28.5 HP)	50.7 kW (74.0 HP)
Rating Operating Capacity (35% Tipping)	326.6 kg (720 lbs)	—
Rating Operating Capacity (50% Tipping)	590 kg (1000 lbs)	1088.6 kg (2400 lbs)
Operating Weight	1905.1 kg (4200 lbs)	3245.0 kg (7154 lbs)
Tipping Load	997.9 kg (2200 lbs)	2177.2 kg (4800 lbs)
Maximum Travel Speed	10.6 km (6.6 mph)	11.9 km (7.4 mph)
Pump Capacity	36.0 LPM (9.5 GPM)	66.5 LPM (17.6 GPM)
Relief Valve Pressure	131.0 Bar (1900 psi)	241.3 Bar (3500 psi)
Hydraulic Tank Capacity	13.2 L (3.5 gal)	36.0 L (9.5 gal)
Raise Lift Arms	3.6 seconds	3.8 seconds
Lower Lift Arms	2.9 seconds	2.5 seconds
Bucket Rollback	2.2 seconds	1.7 seconds
Bucket Dump	2.7 seconds	2.3 seconds
Engine Manufacturer	Kubota	Bobcat
Engine Model	D1402	2.4 L V2
Engine Type	Diesel	Diesel
No of Cylinders	3	4
Rated Speed	2500 RPM	2600 RPM
Combustion Chamber	Spherical type	Direct injection
Compression Ratio	21.0	17.0:1
Firing Order	1-3-4-2	1-3-4-2
Gross Power	23.9 kW (32.0 HP)	50.7 kW (74.0 HP)
Displacement	1395 cc (85 cu in.)	2401 cc (146.5 cu.in.)
Bore	8.5 cm (3.3 in.)	—
Stroke	8.2 cm (3.2 in.)	—
Peak Torque	86 N∙m (63 ft-lb)	266.3 N∙m (196.4 ft-lb)
Coolant Capacity	10.4 L (2.7 gal)	11.3 L (3.0 gal)
Engine Oil Capacity	6.6 L (1.7 gal)	9.0 L (2.4 gal)
Fuel Tank Capacity	49.2 L (13.0 gal)	107.1 L (28.3 gal)
Cab Height	192.5 cm (75.8 in.)	204.5 cm (80.5 in.)
Bucket Hinge Pin Height	276.9 cm (109.0 in.)	304.8 cm (120.0 in.)
Width	137.2 cm (54.0 in.)	167.6 cm (64.6 in.)
Length with Bucket	305.3 cm (120.2 in.)	342.9 cm (135.0 in.)
Dump Height	219.2 cm (86.3 in.)	—
Dump Reach	55.4 cm (21.8 in.)	86.9 cm (34.2 in.)
Ground Clearance	19.1 cm (7.5 in.)	—
Dump Angle	37 °	—
Rollback Angle	26 °	—
Departure Angle	28 °	—
Front Tire	7.00×15.6	10-16.5
Rear Tire	7.00×15.6	10-16.5
Lift Breakout Force	—	2245.3 kg (4950 lbs)
Tilt Breakout Force	—	2449.4 kg (5400 lbs)
Optional High Speed	—	17.7 km (11.0 mph)
Optional Pump Capacity	—	101.8 LPM (26.9 GPM)
Torque Speed	—	1800 RPM
Emissions	—	Tier 4

Values come from the manufacturer-sourced model files; empty cells mean the property is not published for that model. No performance ranking is applied.