The Kubota GL21 tractor engine horsepower found is 20.7 hp. PTO horsepower found is 13.5 hp.
Engine HP20.7 hp
PTO HP13.5 hp
Power / weight9 hp per 1,000 lb
Kubota GL21 Horsepower Specs
Engine horsepower
20.7 hp
PTO horsepower
13.5 hp
Rated engine RPM
2,600 rpm
Engine displacement
85.4 cu in (1.4 L)
Engine cylinders
3 cylinders
Engine model
Kubota D1403
Operating weight
2,293 lb (1,040 kg)
PTO-to-engine ratio
65.2% of engine horsepower
Power-to-weight
9 hp per 1,000 lb
Horsepower class
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
13.5 hp
Average
25 hp
Low
12 hp
High
50 hp
Operating weight benchmark
This model
2,293 lb
Average
2,500 lb
Low
1,300 lb
High
4,500 lb
Power-to-weight benchmark
This model
9 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 GL21 Horsepower FAQ
Engine horsepower
The Kubota GL21 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 GL21 is 13.5 hp. PTO horsepower is the more useful figure when sizing PTO-driven implements.
Horsepower class
The Kubota GL21 is listed as compact tractor horsepower based on the engine horsepower found.
Rated engine RPM
The rated engine speed found for the Kubota GL21 is 2,600 rpm. This is the engine speed used for the listed power rating.
Engine specs found
Engine specs found for the Kubota GL21 include Kubota D1403, 85.4 cu in (1.4 L) displacement, and 3 cylinders.
Operating weight
The operating weight found for the Kubota GL21 is 2,293 lb (1,040 kg). Weight matters because the same horsepower feels different in a light mower than in a heavy tractor.
PTO-to-engine horsepower ratio
The PTO-to-engine horsepower ratio for the Kubota GL21 is 65.2% of engine horsepower based on the figures found.
Power-to-weight
The calculated power-to-weight figure for the Kubota GL21 is 9 hp per 1,000 lb based on the engine horsepower and operating weight found.
Horsepower planning note
The practical split on the Kubota GL21 is engine power at 20.7 hp and PTO power at 13.5 hp.
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.
