The Kubota KB21X tractor engine horsepower found is 20.7 hp. PTO horsepower found is also 20.7 hp.
Engine HP20.7 hp
PTO HP20.7 hp
Power / weight10.6 hp per 1,000 lb
Kubota KB21X Horsepower Specs
Engine horsepower
20.7 hp
PTO horsepower
20.7 hp
Rated engine RPM
2,600 rpm
Engine displacement
67.1 cu in (1.1 L)
Engine cylinders
3 cylinders
Engine
Kubota 1.1L
Operating weight
1,951 lb (885 kg)
Power-to-weight
10.6 hp per 1,000 lb
Horsepower class
subcompact / small compact tractor horsepower
Horsepower Benchmarks
Engine horsepower benchmark
This model
20.7 hp
Average
32 hp
Low
16 hp
High
60 hp
PTO horsepower benchmark
This model
20.7 hp
Average
25 hp
Low
12 hp
High
50 hp
Operating weight benchmark
This model
1,951 lb
Average
2,500 lb
Low
1,300 lb
High
4,500 lb
Power-to-weight benchmark
This model
10.6 hp/1k lb
Average
14 hp/1k lb
Low
8 hp/1k lb
High
25 hp/1k lb
Benchmarks are general reference ranges for compact tractors.
Kubota KB21X Horsepower FAQ
Engine horsepower
The Kubota KB21X tractor engine horsepower found is 20.7 hp. Use engine horsepower for comparing engine output, not necessarily implement power at the PTO.
PTO horsepower
The PTO horsepower found for the Kubota KB21X is 20.7 hp. Confirm this against the operator manual because PTO output is often lower than engine horsepower.
Horsepower class
The Kubota KB21X is listed as subcompact / small compact tractor horsepower based on the engine horsepower found.
Rated engine RPM
The rated engine speed found for the Kubota KB21X is 2,600 rpm. This is the engine speed used for the listed power rating.
Engine specs found
Engine specs found for the Kubota KB21X include Kubota 1.1L, 67.1 cu in (1.1 L) displacement, and 3 cylinders.
Operating weight
The operating weight found for the Kubota KB21X is 1,951 lb (885 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 KB21X is 10.6 hp per 1,000 lb based on the engine horsepower and operating weight found.
Horsepower planning note
For the Kubota KB21X, engine horsepower and PTO horsepower are both listed as 20.7 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.
