The Case IH 255 tractor engine horsepower is 24 hp | 17.9 kW, and PTO horsepower is 21 hp | 15.7 kW.
Engine HP24 hp | 17.9 kW
PTO HP21 hp | 15.7 kW
PTO Transfer87.5%
Displacement64.75 ci | 1.1 L
Case IH 255 Horsepower Specs
Engine net horsepower
24 hp | 17.9 kW
PTO horsepower claimed
21 hp | 15.7 kW
Case IH 255 Useful Horsepower Calculations
PTO-to-engine power transfer
87.5% of engine hp reaches the PTO
Engine size per PTO horsepower
3.1 ci per PTO hp
PTO horsepower per liter
19.1 PTO hp per L
Engine size per engine horsepower
2.7 ci per engine hp
Engine horsepower per liter
21.8 engine hp per L
Fuel tank per PTO horsepower
0.3 gal per PTO hp
Rated speed per PTO horsepower
128.6 rpm per PTO hp
Case IH 255 Engine Specs
Displacement
64.75 ci | 1.1 L
Bore and stroke
2.99×3.07 inches | 76 x 78 mm
Rated RPM
2700
Case IH 255 Fuel, Cooling, Starting & Service Specs
Fuel capacity
5.5 gal | 20.8 L
Starter volts
12
Battery volts
12
Case IH 255 Horsepower Comparison Charts
Engine horsepower comparison
This model
24 hp
Average
35 hp
Low
15 hp
High
60 hp
PTO horsepower comparison
This model
21 hp
Average
28 hp
Low
12 hp
High
50 hp
Displacement comparison
This model
64.8 ci
Average
110 ci
Low
50 ci
High
180 ci
Rated RPM comparison
This model
2,700 rpm
Average
2,400 rpm
Low
1,800 rpm
High
3,000 rpm
Engine size per PTO HP
This model
3.1 ci/hp
Average
3.1 ci/hp
Low
1.8 ci/hp
High
5 ci/hp
Benchmarks use practical low, average and high ranges for the compact and small utility tractor category. Use the operator manual and actual engine/tractor configuration before sizing implements or judging working power.
Case IH 255 Horsepower FAQ
How much horsepower does the Case IH 255 have?
The listed engine output is 24 hp, below the 35 hp benchmark average. That is a lower-power result, so the smarter match is lighter implements and jobs that do not demand more than about 24 hp.
How much PTO horsepower does the Case IH 255 have?
The listed PTO output is 21 hp, below the 28 hp benchmark average. For real use, size PTO implements below or near 21 hp rather than using a bigger engine-horsepower number.
How much engine power reaches the PTO on the Case IH 255?
The PTO-to-engine transfer works out to 87.5%, from 24 engine hp to 21 PTO hp. That is a normal usable range for judging PTO implement fit.
How big is the Case IH 255 engine?
The engine displacement is 64.8 ci, below the 110 ci benchmark average. Smaller displacement usually means less engine size behind each horsepower number.
Is the Case IH 255 engine stressed for its PTO horsepower?
The engine has about 3.1 cubic inches per PTO hp, using 64.8 ci and 21 PTO hp. That is close to the normal benchmark for this category.
How much PTO horsepower per liter does the Case IH 255 make?
The output density is about 19.1 PTO hp per liter, using 21 PTO hp and 1.1 L of displacement. Higher hp/L means more output squeezed from each liter; lower hp/L usually means a more relaxed engine tune.
What rpm is the Case IH 255 rated at?
The rated speed is 2,700 rpm, above the 2,400 rpm benchmark average. A higher 2,700 rpm rating can make power well but may feel busier under load.
Official information note
Horsepower and engine specs can vary by year, market, engine option, fuel system, test standard and tractor configuration. Check the operator manual, spec plate, parts book and official caseih.com website before buying parts, sizing implements or making repair decisions.
