The New Holland TT55 tractor engine horsepower is 55.1 hp | 41.1 kW, and PTO horsepower is 47 hp | 35.0 kW.
Engine HP55.1 hp | 41.1 kW
PTO HP47 hp | 35.0 kW
PTO Transfer85.3%
Torque136.1 lb-ft | 184.6 Nm
Displacement179 ci | 2.9 L
New Holland TT55 Horsepower Specs
Engine horsepower
55.1 hp | 41.1 kW
PTO horsepower claimed
47 hp | 35.0 kW
New Holland TT55 Useful Horsepower Calculations
PTO-to-engine power transfer
85.3% of engine hp reaches the PTO
Engine size per PTO horsepower
3.8 ci per PTO hp
PTO horsepower per liter
16.2 PTO hp per L
Engine size per engine horsepower
3.2 ci per engine hp
Engine horsepower per liter
19 engine hp per L
Torque per PTO horsepower
2.9 lb-ft per PTO hp
Rated speed per PTO horsepower
53.2 rpm per PTO hp
New Holland TT55 Engine Specs
Displacement
179 ci | 2.9 L
Bore and stroke
4.094×4.528 inches | 104 x 115 mm
Rated RPM
2500
Torque
136.1 lb-ft | 184.6 Nm
Torque RPM
1500
New Holland TT55 Fuel, Cooling, Starting & Service Specs
Starter volts
12
Battery volts
12
New Holland TT55 Horsepower Comparison Charts
Engine horsepower comparison
This model
55.1 hp
Average
80 hp
Low
45 hp
High
120 hp
PTO horsepower comparison
This model
47 hp
Average
65 hp
Low
35 hp
High
105 hp
Displacement comparison
This model
179 ci
Average
260 ci
Low
150 ci
High
380 ci
Torque comparison
This model
136.1 lb-ft
Average
240 lb-ft
Low
120 lb-ft
High
420 lb-ft
Rated RPM comparison
This model
2,500 rpm
Average
2,200 rpm
Low
1,800 rpm
High
2,700 rpm
Engine size per PTO HP
This model
3.8 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.
New Holland TT55 Horsepower FAQ
How much horsepower does the New Holland TT55 have?
The listed engine output is 55.1 hp, below the 80 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 55.1 hp.
How much PTO horsepower does the New Holland TT55 have?
The listed PTO output is 47 hp, below the 65 hp benchmark average. For real use, size PTO implements below or near 47 hp rather than using a bigger engine-horsepower number.
How much engine power reaches the PTO on the New Holland TT55?
The PTO-to-engine transfer works out to 85.3%, from 55.1 engine hp to 47 PTO hp. That is a normal usable range for judging PTO implement fit.
How big is the New Holland TT55 engine?
The engine displacement is 179 ci, below the 260 ci benchmark average. Smaller displacement usually means less engine size behind each horsepower number.
Is the New Holland TT55 engine stressed for its PTO horsepower?
The engine has about 3.8 cubic inches per PTO hp, using 179 ci and 47 PTO hp. That is close to the normal benchmark for this category.
How much PTO horsepower per liter does the New Holland TT55 make?
The output density is about 16.2 PTO hp per liter, using 47 PTO hp and 2.9 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 New Holland TT55 have?
The listed torque is 136.1 lb-ft, below the 240 lb-ft benchmark average. With 136.1 lb-ft listed, gearing matters more when the tractor is loaded hard.
Does the New Holland TT55 have good torque for its PTO horsepower?
The torque-to-PTO-power figure is about 2.9 lb-ft per PTO hp, using 136.1 lb-ft and 47 PTO hp. A higher number usually points to a slower, gruntier working feel.
What rpm is the New Holland TT55 rated at?
The rated speed is 2,500 rpm, above the 2,200 rpm benchmark average. A higher 2,500 rpm rating can make power well but may feel busier under load.
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 newholland.com website before buying parts, sizing implements or making repair decisions.
