The Case IH CS 78 tractor engine horsepower is 78 hp | 58.2 kW, and PTO horsepower is 71 hp | 52.9 kW.
Engine HP78 hp | 58.2 kW
PTO HP71 hp | 52.9 kW
PTO Transfer91%
Torque220 lb-ft | 298.3 Nm | 225 lb-ft | 305.1 Nm
Displacement253.6 ci | 4.2 L | 268.3 ci | 4.4 L
Case IH CS 78 Horsepower Specs
Engine horsepower
78 hp | 58.2 kW
PTO horsepower claimed
71 hp | 52.9 kW
Case IH CS 78 Useful Horsepower Calculations
PTO-to-engine power transfer
91% of engine hp reaches the PTO
Engine size per PTO horsepower
3.6 ci per PTO hp
PTO horsepower per liter
16.9 PTO hp per L
Engine size per engine horsepower
3.3 ci per engine hp
Engine horsepower per liter
18.6 engine hp per L
Torque per PTO horsepower
3.1 lb-ft per PTO hp
Rated speed per PTO horsepower
32.4 rpm per PTO hp
Case IH CS 78 Engine Specs
Engine type
turbocharged diesel
Displacement
253.6 ci | 4.2 L | 268.3 ci | 4.4 L
Bore and stroke
4.13×4.72 inches | 105 x 120 mm | 4.25×4.72 inches | 108 x 120 mm
Rated RPM
2300
Torque
220 lb-ft | 298.3 Nm | 225 lb-ft | 305.1 Nm
Torque RPM
1500 | 1300
Case IH CS 78 Fuel, Cooling, Starting & Service Specs
Starter volts
12
Battery volts
12
Case IH CS 78 Horsepower Comparison Charts
Engine horsepower comparison
This model
78 hp
Average
80 hp
Low
45 hp
High
120 hp
PTO horsepower comparison
This model
71 hp
Average
65 hp
Low
35 hp
High
105 hp
Displacement comparison
This model
253.6 ci
Average
260 ci
Low
150 ci
High
380 ci
Torque comparison
This model
220 lb-ft
Average
240 lb-ft
Low
120 lb-ft
High
420 lb-ft
Rated RPM comparison
This model
2,300 rpm
Average
2,200 rpm
Low
1,800 rpm
High
2,700 rpm
Engine size per PTO HP
This model
3.6 ci/hp
Average
3.5 ci/hp
Low
2.2 ci/hp
High
5.8 ci/hp
Benchmarks use practical low, average and high ranges for the utility tractor category. Use the operator manual and actual engine/tractor configuration before sizing implements or judging working power.
Case IH CS 78 Horsepower FAQ
How much horsepower does the Case IH CS 78 have?
The listed engine output is 78 hp, close to the 80 hp benchmark average. That puts the tractor in a normal working range for this benchmark group, with 78 hp as the main engine number.
How much PTO horsepower does the Case IH CS 78 have?
The listed PTO output is 71 hp, close to the 65 hp benchmark average. Use 71 PTO hp as the practical implement-sizing number.
How much engine power reaches the PTO on the Case IH CS 78?
The PTO-to-engine transfer works out to 91%, from 78 engine hp to 71 PTO hp. That is a strong transfer figure when the two specs are from the same configuration.
How big is the Case IH CS 78 engine?
The engine displacement is 253.6 ci, close to the 260 ci benchmark average. It is close to the normal engine-size range for this horsepower class.
Is the Case IH CS 78 engine stressed for its PTO horsepower?
The engine has about 3.6 cubic inches per PTO hp, using 253.6 ci and 71 PTO hp. That is close to the normal benchmark for this category.
How much PTO horsepower per liter does the Case IH CS 78 make?
The output density is about 16.9 PTO hp per liter, using 71 PTO hp and 4.2 L of displacement. Higher hp/L means more output squeezed from each liter; lower hp/L usually means a more relaxed engine tune.
How much torque does the Case IH CS 78 have?
The listed torque is 220 lb-ft, close to the 240 lb-ft benchmark average. The 220 lb-ft figure is a normal torque result for this class.
Does the Case IH CS 78 have good torque for its PTO horsepower?
The torque-to-PTO-power figure is about 3.1 lb-ft per PTO hp, using 220 lb-ft and 71 PTO hp. A higher number usually points to a slower, gruntier working feel.
What rpm is the Case IH CS 78 rated at?
The rated speed is 2,300 rpm, close to the 2,200 rpm benchmark average. The 2,300 rpm figure is around normal for this class.
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.
