The New Holland TG305 tractor engine horsepower is 304 hp | 226.7 kW, PTO horsepower is 255 hp | 190.2 kW, and the drawbar horsepower is 216.31 hp | 161.3 kW.
Engine HP304 hp | 226.7 kW
PTO HP255 hp | 190.2 kW
Drawbar HP216.31 hp | 161.3 kW
PTO Transfer83.9%
Displacement506.5 ci | 8.3 L
New Holland TG305 Horsepower Specs
Engine horsepower
304 hp | 226.7 kW
PTO horsepower claimed
255 hp | 190.2 kW
PTO horsepower tested
257.22 hp | 191.8 kW
Drawbar horsepower tested
216.31 hp | 161.3 kW
New Holland TG305 Useful Horsepower Calculations
PTO-to-engine power transfer
83.9% of engine hp reaches the PTO
Drawbar-to-engine power transfer
71.2% of engine hp reaches the drawbar
Drawbar-to-PTO power ratio
84.8% drawbar hp vs PTO hp
Engine size per PTO horsepower
2 ci per PTO hp
PTO horsepower per liter
30.7 PTO hp per L
Engine size per engine horsepower
1.7 ci per engine hp
Engine horsepower per liter
36.6 engine hp per L
Rated speed per PTO horsepower
8.6 rpm per PTO hp
New Holland TG305 Engine Specs
Engine type
turbocharged intercooled diesel
Displacement
506.5 ci | 8.3 L
Bore and stroke
4.488×5.315 inches | 114 x 135 mm
Compression
17.5:1
Rated RPM
2200
New Holland TG305 Fuel, Cooling, Starting & Service Specs
Starter volts
12
New Holland TG305 Horsepower Comparison Charts
Engine horsepower comparison
This model
304 hp
Average
210 hp
Low
120 hp
High
380 hp
PTO horsepower comparison
This model
255 hp
Average
175 hp
Low
100 hp
High
320 hp
Drawbar horsepower comparison
This model
216.3 hp
Average
150 hp
Low
85 hp
High
280 hp
Displacement comparison
This model
506.5 ci
Average
520 ci
Low
360 ci
High
750 ci
Rated RPM comparison
This model
2,200 rpm
Average
2,100 rpm
Low
1,600 rpm
High
2,500 rpm
Engine size per PTO HP
This model
2 ci/hp
Average
3.3 ci/hp
Low
2 ci/hp
High
5.2 ci/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.
New Holland TG305 Horsepower FAQ
How much horsepower does the New Holland TG305 have?
The listed engine output is 304 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 304 hp.
How much PTO horsepower does the New Holland TG305 have?
The listed PTO output is 255 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 255 hp.
How much drawbar horsepower does the New Holland TG305 have?
The listed drawbar output is 216.3 hp, above the 150 hp benchmark average. That makes the 216.3 hp drawbar number more useful than engine hp for tillage and heavy pulling.
How much engine power reaches the PTO on the New Holland TG305?
The PTO-to-engine transfer works out to 83.9%, from 304 engine hp to 255 PTO hp. That is a normal usable range for judging PTO implement fit.
How efficient is the New Holland TG305 for pulling work?
The drawbar-to-engine transfer is about 71.2%, from 304 engine hp to 216.3 drawbar hp. That gives a more grounded pulling estimate than engine horsepower alone.
Is the New Holland TG305 better judged by PTO hp or drawbar hp?
The drawbar output is about 84.8% of PTO output, comparing 216.3 drawbar hp with 255 PTO hp. That helps separate pulling ability from PTO implement ability.
How big is the New Holland TG305 engine?
The engine displacement is 506.5 ci, close to the 520 ci benchmark average. It is close to the normal engine-size range for this horsepower class.
Is the New Holland TG305 engine stressed for its PTO horsepower?
The engine has about 2 cubic inches per PTO hp, using 506.5 ci and 255 PTO hp. That is a smaller-displacement, higher-output style result.
How much PTO horsepower per liter does the New Holland TG305 make?
The output density is about 30.7 PTO hp per liter, using 255 PTO hp and 8.3 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 newholland.com website before buying parts, sizing implements or making repair decisions.
