The New Holland Boomer 4055 tractor engine horsepower is 55 hp | 41.0 kW, and PTO horsepower is 48.01 hp | 35.8 kW.
Engine HP55 hp | 41.0 kW
PTO HP48.01 hp | 35.8 kW
PTO Transfer87.3%
Displacement135.2 ci | 2.2 L
New Holland Boomer 4055 Horsepower Specs
Engine gross horsepower
55 hp | 41.0 kW
PTO horsepower tested
48.01 hp | 35.8 kW
New Holland Boomer 4055 Useful Horsepower Calculations
PTO-to-engine power transfer
87.3% of engine hp reaches the PTO
Engine size per PTO horsepower
2.8 ci per PTO hp
PTO horsepower per liter
21.8 PTO hp per L
Engine size per engine horsepower
2.5 ci per engine hp
Engine horsepower per liter
25 engine hp per L
Rated speed per PTO horsepower
56.2 rpm per PTO hp
New Holland Boomer 4055 Engine Specs
Engine type
turbocharged diesel
Displacement
135.2 ci | 2.2 L
Bore and stroke
3.307×3.937 inches | 84 x 100 mm
Rated RPM
2700
New Holland Boomer 4055 Fuel, Cooling, Starting & Service Specs
Starter volts
12
Battery volts
12
New Holland Boomer 4055 Horsepower Comparison Charts
Engine horsepower comparison
This model
55 hp
Average
35 hp
Low
15 hp
High
60 hp
PTO horsepower comparison
This model
48 hp
Average
28 hp
Low
12 hp
High
50 hp
Displacement comparison
This model
135.2 ci
Average
110 ci
Low
50 ci
High
180 ci
Rated RPM comparison
This model
2,700 rpm
Average
2,400 rpm
Low
1,800 rpm
High
3,000 rpm
Engine size per PTO HP
This model
2.8 ci/hp
Average
3.1 ci/hp
Low
1.8 ci/hp
High
5 ci/hp
Benchmarks use practical low, average and high ranges for the compact and small utility tractor category. Use the operator manual and actual engine/tractor configuration before sizing implements or judging working power.
New Holland Boomer 4055 Horsepower FAQ
How much horsepower does the New Holland Boomer 4055 have?
The listed engine output is 55 hp, above the 35 hp benchmark average. That is a higher-power result, so ballast, tire setup and implement width matter if you want to use the full 55 hp.
How much PTO horsepower does the New Holland Boomer 4055 have?
The listed PTO output is 48 hp, above the 28 hp benchmark average. That is the number to use for mowers, balers, augers, pumps and other PTO tools that need up to about 48 hp.
How much engine power reaches the PTO on the New Holland Boomer 4055?
The PTO-to-engine transfer works out to 87.3%, from 55 engine hp to 48 PTO hp. That is a normal usable range for judging PTO implement fit.
How big is the New Holland Boomer 4055 engine?
The engine displacement is 135.2 ci, above the 110 ci benchmark average. Bigger displacement can help low-rpm pull and load-holding feel.
Is the New Holland Boomer 4055 engine stressed for its PTO horsepower?
The engine has about 2.8 cubic inches per PTO hp, using 135.2 ci and 48 PTO hp. That is close to the normal benchmark for this category.
How much PTO horsepower per liter does the New Holland Boomer 4055 make?
The output density is about 21.8 PTO hp per liter, using 48 PTO hp and 2.2 L of displacement. Higher hp/L means more output squeezed from each liter; lower hp/L usually means a more relaxed engine tune.
What rpm is the New Holland Boomer 4055 rated at?
The rated speed is 2,700 rpm, above the 2,400 rpm benchmark average. A higher 2,700 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.
