The Case IH STX380 tractor engine horsepower is 380 hp | 283.4 kW, PTO horsepower is 335 hp | 249.8 kW, and the drawbar horsepower is 319.41 hp | 238.2 kW.
Case IH STX380 Horsepower Specs
| Engine horsepower | 380 hp | 283.4 kW |
|---|---|
| PTO horsepower claimed | 335 hp | 249.8 kW |
| PTO horsepower tested | 390.87 hp | 291.5 kW |
| Drawbar horsepower tested | 319.41 hp | 238.2 kW |
Case IH STX380 Useful Horsepower Calculations
| PTO-to-engine power transfer | 88.2% of engine hp reaches the PTO |
|---|---|
| Drawbar-to-engine power transfer | 84.1% of engine hp reaches the drawbar |
| Drawbar-to-PTO power ratio | 95.3% drawbar hp vs PTO hp |
| Engine size per PTO horsepower | 2.3 ci per PTO hp |
| PTO horsepower per liter | 26 PTO hp per L |
| Engine size per engine horsepower | 2.1 ci per engine hp |
| Engine horsepower per liter | 29.5 engine hp per L |
| Rated speed per PTO horsepower | 6 rpm per PTO hp |
Case IH STX380 Engine Specs
| Engine type | turbocharged aftercooled diesel |
|---|---|
| Displacement | 786 ci | 12.9 L |
| Bore and stroke | 5.314×5.906 inches | 135 x 150 mm |
| Compression | 16.5:1 |
| Rated RPM | 2000 |
Case IH STX380 Fuel, Cooling, Starting & Service Specs
| Starter volts | 12 |
|---|---|
| Battery volts | 12 |
Case IH STX380 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 STX380 Horsepower FAQ
How much horsepower does the Case IH STX380 have?
The listed engine output is 380 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 380 hp.
How much PTO horsepower does the Case IH STX380 have?
The listed PTO output is 335 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 335 hp.
How much drawbar horsepower does the Case IH STX380 have?
The listed drawbar output is 319.4 hp, above the 150 hp benchmark average. That makes the 319.4 hp drawbar number more useful than engine hp for tillage and heavy pulling.
How much engine power reaches the PTO on the Case IH STX380?
The PTO-to-engine transfer works out to 88.2%, from 380 engine hp to 335 PTO hp. That is a normal usable range for judging PTO implement fit.
How efficient is the Case IH STX380 for pulling work?
The drawbar-to-engine transfer is about 84.1%, from 380 engine hp to 319.4 drawbar hp. That is a strong pulling-efficiency number if the specs come from the same test setup.
Is the Case IH STX380 better judged by PTO hp or drawbar hp?
The drawbar output is about 95.3% of PTO output, comparing 319.4 drawbar hp with 335 PTO hp. That helps separate pulling ability from PTO implement ability.
How big is the Case IH STX380 engine?
The engine displacement is 786 ci, above the 520 ci benchmark average. Bigger displacement can help low-rpm pull and load-holding feel.
Is the Case IH STX380 engine stressed for its PTO horsepower?
The engine has about 2.4 cubic inches per PTO hp, using 786 ci and 335 PTO hp. That is a smaller-displacement, higher-output style result.
How much PTO horsepower per liter does the Case IH STX380 make?
The output density is about 26 PTO hp per liter, using 335 PTO hp and 12.9 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.
