The Case IH Maxxum 120 tractor engine horsepower is 129 hp | 96.2 kW, PTO horsepower is 100 hp | 74.6 kW, and the drawbar horsepower is 81.0 hp | 60.4 kW.
Engine HP129 hp | 96.2 kW
PTO HP100 hp | 74.6 kW
Drawbar HP81.0 hp | 60.4 kW
PTO Transfer77.5%
Torque415 lb-ft | 562.7 Nm
Displacement273.7 ci | 4.5 L
Case IH Maxxum 120 Horsepower Specs
Engine gross horsepower
129 hp | 96.2 kW
PTO horsepower claimed
100 hp | 74.6 kW
PTO horsepower tested
117.9 hp | 87.9 kW
Drawbar horsepower tested
81.0 hp | 60.4 kW
Case IH Maxxum 120 Useful Horsepower Calculations
PTO-to-engine power transfer
77.5% of engine hp reaches the PTO
Drawbar-to-engine power transfer
62.8% of engine hp reaches the drawbar
Drawbar-to-PTO power ratio
81% drawbar hp vs PTO hp
Engine size per PTO horsepower
2.7 ci per PTO hp
PTO horsepower per liter
22.2 PTO hp per L
Engine size per engine horsepower
2.1 ci per engine hp
Engine horsepower per liter
28.7 engine hp per L
Torque per PTO horsepower
4.2 lb-ft per PTO hp
Rated speed per PTO horsepower
22 rpm per PTO hp
Case IH Maxxum 120 Engine Specs
Engine model
year
Engine type
turbocharged aftercooled diesel
Displacement
273.7 ci | 4.5 L
Bore and stroke
4.094×5.197 inches | 104 x 132 mm
Compression
16.5:1
Emissions
Tier 3
Rated RPM
2200
Torque
415 lb-ft | 562.7 Nm
Torque RPM
1400
Case IH Maxxum 120 Fuel, Cooling, Starting & Service Specs
Starter volts
12
Battery volts
12
Firing order
1-3-4-2
Case IH Maxxum 120 Horsepower Comparison Charts
Engine horsepower comparison
This model
129 hp
Average
80 hp
Low
45 hp
High
120 hp
PTO horsepower comparison
This model
100 hp
Average
65 hp
Low
35 hp
High
105 hp
Drawbar horsepower comparison
This model
81 hp
Average
55 hp
Low
30 hp
High
95 hp
Displacement comparison
This model
273.7 ci
Average
260 ci
Low
150 ci
High
380 ci
Torque comparison
This model
415 lb-ft
Average
240 lb-ft
Low
120 lb-ft
High
420 lb-ft
Rated RPM comparison
This model
2,200 rpm
Average
2,200 rpm
Low
1,800 rpm
High
2,700 rpm
Engine size per PTO HP
This model
2.7 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 Maxxum 120 Horsepower FAQ
How much horsepower does the Case IH Maxxum 120 have?
The listed engine output is 129 hp, above the 80 hp benchmark average. That is a higher-power result, so ballast, tire setup and implement width matter if you want to use the full 129 hp.
How much PTO horsepower does the Case IH Maxxum 120 have?
The listed PTO output is 100 hp, above the 65 hp benchmark average. That is the number to use for mowers, balers, augers, pumps and other PTO tools that need up to about 100 hp.
How much drawbar horsepower does the Case IH Maxxum 120 have?
The listed drawbar output is 81 hp, above the 55 hp benchmark average. That makes the 81 hp drawbar number more useful than engine hp for tillage and heavy pulling.
How much engine power reaches the PTO on the Case IH Maxxum 120?
The PTO-to-engine transfer works out to 77.5%, from 129 engine hp to 100 PTO hp. That is a normal usable range for judging PTO implement fit.
How efficient is the Case IH Maxxum 120 for pulling work?
The drawbar-to-engine transfer is about 62.8%, from 129 engine hp to 81 drawbar hp. That means traction losses and drivetrain losses are a big part of the real pulling result.
Is the Case IH Maxxum 120 better judged by PTO hp or drawbar hp?
The drawbar output is about 81% of PTO output, comparing 81 drawbar hp with 100 PTO hp. That helps separate pulling ability from PTO implement ability.
How big is the Case IH Maxxum 120 engine?
The engine displacement is 273.7 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 Maxxum 120 engine stressed for its PTO horsepower?
The engine has about 2.7 cubic inches per PTO hp, using 273.7 ci and 100 PTO hp. That is a smaller-displacement, higher-output style result.
How much PTO horsepower per liter does the Case IH Maxxum 120 make?
The output density is about 22.2 PTO hp per liter, using 100 PTO hp and 4.5 L of displacement. Higher hp/L means more output squeezed from each liter; lower hp/L usually means a more relaxed engine tune.
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.
