The Case IH STX325 tractor engine horsepower is 325 hp | 242.4 kW, PTO horsepower is 270 hp | 201.3 kW, and the drawbar horsepower is 240 hp | 179.0 kW.
Case IH STX325 Horsepower Specs
| Engine horsepower | 325 hp | 242.4 kW |
|---|---|
| PTO horsepower claimed | 270 hp | 201.3 kW |
| PTO horsepower tested | 320.75 hp | 239.2 kW |
| Drawbar horsepower claimed | 240 hp | 179.0 kW |
| Drawbar horsepower tested | 260.87 hp | 194.5 kW |
Case IH STX325 Useful Horsepower Calculations
| PTO-to-engine power transfer | 83.1% of engine hp reaches the PTO |
|---|---|
| Drawbar-to-engine power transfer | 73.8% of engine hp reaches the drawbar |
| Drawbar-to-PTO power ratio | 88.9% drawbar hp vs PTO hp |
| Engine size per PTO horsepower | 2 ci per PTO hp |
| PTO horsepower per liter | 30.3 PTO hp per L |
| Engine size per engine horsepower | 1.7 ci per engine hp |
| Engine horsepower per liter | 36.5 engine hp per L |
| Torque per PTO horsepower | 4.3 lb-ft per PTO hp |
| Rated speed per PTO horsepower | 7.4 rpm per PTO hp |
Case IH STX325 Engine Specs
| Engine type | turbocharged aftercooled diesel |
|---|---|
| Displacement | 540 ci | 8.9 L |
| Bore and stroke | 4.488×5.689 inches | 114 x 145 mm |
| Compression | 16.5:1 |
| Rated RPM | 2000 |
| Torque | 1150 lb-ft | 1559.4 Nm |
| Torque RPM | 1400 |
Case IH STX325 Fuel, Cooling, Starting & Service Specs
| Starter volts | 12 |
|---|---|
| Battery volts | 12 |
Case IH STX325 Horsepower Comparison Charts
Engine horsepower comparison
PTO horsepower comparison
Drawbar horsepower comparison
Displacement comparison
Torque 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 STX325 Horsepower FAQ
How much horsepower does the Case IH STX325 have?
The listed engine output is 325 hp, above the 210 hp benchmark average. That is a higher-power result, so ballast, tire setup and implement width matter if you want to use the full 325 hp.
How much PTO horsepower does the Case IH STX325 have?
The listed PTO output is 270 hp, above the 175 hp benchmark average. That is the number to use for mowers, balers, augers, pumps and other PTO tools that need up to about 270 hp.
How much drawbar horsepower does the Case IH STX325 have?
The listed drawbar output is 240 hp, above the 150 hp benchmark average. That makes the 240 hp drawbar number more useful than engine hp for tillage and heavy pulling.
How much engine power reaches the PTO on the Case IH STX325?
The PTO-to-engine transfer works out to 83.1%, from 325 engine hp to 270 PTO hp. That is a normal usable range for judging PTO implement fit.
How efficient is the Case IH STX325 for pulling work?
The drawbar-to-engine transfer is about 73.8%, from 325 engine hp to 240 drawbar hp. That gives a more grounded pulling estimate than engine horsepower alone.
Is the Case IH STX325 better judged by PTO hp or drawbar hp?
The drawbar output is about 88.9% of PTO output, comparing 240 drawbar hp with 270 PTO hp. That helps separate pulling ability from PTO implement ability.
How big is the Case IH STX325 engine?
The engine displacement is 540 ci, close to the 520 ci benchmark average. It is close to the normal engine-size range for this horsepower class.
Is the Case IH STX325 engine stressed for its PTO horsepower?
The engine has about 2 cubic inches per PTO hp, using 540 ci and 270 PTO hp. That is a smaller-displacement, higher-output style result.
How much PTO horsepower per liter does the Case IH STX325 make?
The output density is about 30.3 PTO hp per liter, using 270 PTO hp and 8.9 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.
