The Kubota ZD321 machine engine horsepower found is 26 hp. PTO horsepower found is also 26 hp.
Engine HP26 hp
PTO HP26 hp
Power / weight15.3 hp per 1,000 lb
Kubota ZD321 Horsepower Specs
Engine horsepower
26 hp
PTO horsepower
26 hp
Rated engine RPM
3,200 rpm
Engine torque
54 lb-ft (73 Nm)
Engine displacement
61.1 cu in (1 L)
Engine cylinders
3 cylinders
Engine model
Kubota D1005
Operating weight
1,700 lb (771 kg)
Power-to-weight
15.3 hp per 1,000 lb
Horsepower class
mid-power mower / garden tractor
Horsepower Benchmarks
Engine horsepower benchmark
This model
26 hp
Average
23 hp
Low
12 hp
High
40 hp
PTO horsepower benchmark
This model
26 hp
Average
18 hp
Low
8 hp
High
35 hp
Operating weight benchmark
This model
1,700 lb
Average
1,200 lb
Low
500 lb
High
2,600 lb
Power-to-weight benchmark
This model
15.3 hp/1k lb
Average
20 hp/1k lb
Low
12 hp/1k lb
High
35 hp/1k lb
Benchmarks are general reference ranges for lawn and garden tractors and mowers.
Kubota ZD321 Horsepower FAQ
Engine horsepower
The Kubota ZD321 machine engine horsepower found is 26 hp. Use engine horsepower for comparing engine output, not necessarily implement power at the PTO.
PTO horsepower
The PTO horsepower found for the Kubota ZD321 is 26 hp. Confirm this against the operator manual because PTO output is often lower than engine horsepower.
Horsepower class
The Kubota ZD321 is listed as mid-power mower / garden tractor based on the engine horsepower found.
Rated engine RPM
The rated engine speed found for the Kubota ZD321 is 3,200 rpm. This is the engine speed used for the listed power rating.
Engine torque
The engine torque found for the Kubota ZD321 is 54 lb-ft (73 Nm). Torque helps describe low-speed pulling feel, while horsepower describes power output over engine speed.
Engine specs found
Engine specs found for the Kubota ZD321 include Kubota D1005, 61.1 cu in (1 L) displacement, and 3 cylinders.
Operating weight
The operating weight found for the Kubota ZD321 is 1,700 lb (771 kg). Weight matters because the same horsepower feels different in a light mower than in a heavy tractor.
Power-to-weight
The calculated power-to-weight figure for the Kubota ZD321 is 15.3 hp per 1,000 lb based on the engine horsepower and operating weight found.
Horsepower planning note
For the Kubota ZD321, engine horsepower and PTO horsepower are both listed as 26 hp; confirm the PTO rating in the manual before buying PTO-driven implements.
Official information note
Mistakes do happen. Check the operator manual, service manual and official kubotausa.com website for official horsepower, PTO horsepower, engine RPM, torque and operating-weight specifications before buying implements or servicing the machine.
