The Case IH Farmall 125A tractor engine horsepower is 125 hp | 93.2 kW, PTO horsepower is 105 hp | 78.3 kW, and the drawbar horsepower is 94.27 hp | 70.3 kW.
Case IH Farmall 125A Horsepower Specs
| Engine gross horsepower | 125 hp | 93.2 kW |
|---|---|
| PTO horsepower claimed | 105 hp | 78.3 kW |
| PTO horsepower tested | 108.95 hp | 81.2 kW |
| Drawbar horsepower tested | 94.27 hp | 70.3 kW |
Case IH Farmall 125A Useful Horsepower Calculations
| PTO-to-engine power transfer | 84% of engine hp reaches the PTO |
|---|---|
| Drawbar-to-engine power transfer | 75.4% of engine hp reaches the drawbar |
| Drawbar-to-PTO power ratio | 89.8% drawbar hp vs PTO hp |
| Engine size per PTO horsepower | 3.9 ci per PTO hp |
| PTO horsepower per liter | 15.7 PTO hp per L |
| Engine size per engine horsepower | 3.3 ci per engine hp |
| Engine horsepower per liter | 18.7 engine hp per L |
| Fuel tank per PTO horsepower | 0.6 gal per PTO hp |
| Rated speed per PTO horsepower | 21 rpm per PTO hp |
Case IH Farmall 125A Engine Specs
| Engine type | turbocharged diesel |
|---|---|
| Displacement | 411 ci | 6.7 L |
| Bore and stroke | 4.094×5.197 inches | 104 x 132 mm |
| Compression | 17.5:1 |
| Rated RPM | 2200 |
Case IH Farmall 125A Fuel, Cooling, Starting & Service Specs
| Fuel capacity | 62 gal | 234.7 L |
|---|---|
| Starter volts | 12 |
| Battery volts | 12 |
Case IH Farmall 125A Horsepower Comparison Charts
Engine horsepower comparison
PTO horsepower comparison
Drawbar horsepower comparison
Displacement comparison
Rated RPM comparison
Engine size per PTO HP
Benchmarks use practical low, average and high ranges for the large ag tractor category. Use the operator manual and actual engine/tractor configuration before sizing implements or judging working power.
Case IH Farmall 125A Horsepower FAQ
How much horsepower does the Case IH Farmall 125A have?
The listed engine output is 125 hp, below the 210 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 125 hp.
How much PTO horsepower does the Case IH Farmall 125A have?
The listed PTO output is 105 hp, below the 175 hp benchmark average. For real use, size PTO implements below or near 105 hp rather than using a bigger engine-horsepower number.
How much drawbar horsepower does the Case IH Farmall 125A have?
The listed drawbar output is 94.3 hp, below the 150 hp benchmark average. For pulling work, the safer assumption is about 94.3 hp at the drawbar before soil, ballast and tire limits are considered.
How much engine power reaches the PTO on the Case IH Farmall 125A?
The PTO-to-engine transfer works out to 84%, from 125 engine hp to 105 PTO hp. That is a normal usable range for judging PTO implement fit.
How efficient is the Case IH Farmall 125A for pulling work?
The drawbar-to-engine transfer is about 75.4%, from 125 engine hp to 94.3 drawbar hp. That gives a more grounded pulling estimate than engine horsepower alone.
Is the Case IH Farmall 125A better judged by PTO hp or drawbar hp?
The drawbar output is about 89.8% of PTO output, comparing 94.3 drawbar hp with 105 PTO hp. That helps separate pulling ability from PTO implement ability.
How big is the Case IH Farmall 125A engine?
The engine displacement is 411 ci, below the 520 ci benchmark average. Smaller displacement usually means less engine size behind each horsepower number.
Is the Case IH Farmall 125A engine stressed for its PTO horsepower?
The engine has about 3.9 cubic inches per PTO hp, using 411 ci and 105 PTO hp. That points to a larger-displacement, lower-stress style setup.
How much PTO horsepower per liter does the Case IH Farmall 125A make?
The output density is about 15.7 PTO hp per liter, using 105 PTO hp and 6.7 L of displacement. Higher hp/L means more output squeezed from each liter; lower hp/L usually means a more relaxed engine tune.
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.
