The Kubota ZD1021 machine engine horsepower found is 21.6 hp.
Engine HP21.6 hp
Power / weight15.6 hp per 1,000 lb
Kubota ZD1021 Horsepower Specs
Engine horsepower
21.6 hp
Rated engine RPM
3,200 rpm
Engine torque
40.6 lb-ft (55 Nm)
Engine displacement
54.8 cu in (0.9 L)
Engine cylinders
3 cylinders
Engine model
Kubota D902
Operating weight
1,389 lb (630 kg)
Power-to-weight
15.6 hp per 1,000 lb
Horsepower class
mid-power mower / garden tractor
Horsepower Benchmarks
Engine horsepower benchmark
This model
21.6 hp
Average
23 hp
Low
12 hp
High
40 hp
Operating weight benchmark
This model
1,389 lb
Average
1,200 lb
Low
500 lb
High
2,600 lb
Power-to-weight benchmark
This model
15.6 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 ZD1021 Horsepower FAQ
Engine horsepower
The Kubota ZD1021 machine engine horsepower found is 21.6 hp. Use engine horsepower for comparing engine output, not necessarily implement power at the PTO.
Horsepower class
The Kubota ZD1021 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 ZD1021 is 3,200 rpm. This is the engine speed used for the listed power rating.
Engine torque
The engine torque found for the Kubota ZD1021 is 40.6 lb-ft (55 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 ZD1021 include Kubota D902, 54.8 cu in (0.9 L) displacement, and 3 cylinders.
Operating weight
The operating weight found for the Kubota ZD1021 is 1,389 lb (630 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 ZD1021 is 15.6 hp per 1,000 lb based on the engine horsepower and operating weight found.
Horsepower planning note
When comparing the Kubota ZD1021, start with the listed engine horsepower and then check PTO power if you are sizing 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.
