The Kubota M8-181 tractor engine horsepower found is 180 hp. PTO horsepower found is 145 hp.
Engine HP180 hp
PTO HP145 hp
Power / weight9.2 hp per 1,000 lb
Kubota M8-181 Horsepower Specs
Engine horsepower
180 hp
PTO horsepower
145 hp
Rated engine RPM
2,200 rpm
Engine displacement
408.9 cu in (6.7 L)
Engine cylinders
6 cylinders
Engine
Cummins 6.7L
Operating weight
19,510 lb (8,850 kg)
PTO-to-engine ratio
80.6% of engine horsepower
Power-to-weight
9.2 hp per 1,000 lb
Horsepower class
mid-range field-tractor horsepower
Horsepower Benchmarks
Engine horsepower benchmark
This model
180 hp
Average
180 hp
Low
110 hp
High
300 hp
PTO horsepower benchmark
This model
145 hp
Average
150 hp
Low
90 hp
High
260 hp
Operating weight benchmark
This model
19,510 lb
Average
19,000 lb
Low
11,000 lb
High
33,000 lb
Power-to-weight benchmark
This model
9.2 hp/1k lb
Average
10 hp/1k lb
Low
6 hp/1k lb
High
16 hp/1k lb
Benchmarks are general reference ranges for larger field tractors.
Kubota M8-181 Horsepower FAQ
Engine horsepower
The Kubota M8-181 tractor engine horsepower found is 180 hp. Use engine horsepower for comparing engine output, not necessarily implement power at the PTO.
PTO horsepower
The PTO horsepower found for the Kubota M8-181 is 145 hp. PTO horsepower is the more useful figure when sizing PTO-driven implements.
Horsepower class
The Kubota M8-181 is listed as mid-range field-tractor horsepower based on the engine horsepower found.
Rated engine RPM
The rated engine speed found for the Kubota M8-181 is 2,200 rpm. This is the engine speed used for the listed power rating.
Engine specs found
Engine specs found for the Kubota M8-181 include Cummins 6.7L, 408.9 cu in (6.7 L) displacement, and 6 cylinders.
Operating weight
The operating weight found for the Kubota M8-181 is 19,510 lb (8,850 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 M8-181 is 80.6% of engine horsepower based on the figures found.
Power-to-weight
The calculated power-to-weight figure for the Kubota M8-181 is 9.2 hp per 1,000 lb based on the engine horsepower and operating weight found.
Horsepower planning note
For the Kubota M8-181, use 180 hp as the engine comparison number and 145 hp as the implement-power number.
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.
