The John Deere 9RX 640 tractor has 640 hp engine horsepower and 335 hp PTO horsepower.
Engine horsepower640 hp
PTO horsepower335 hp
Drawbar horsepower640 hp
Rated RPM1,550 rpm
Torque2,179 lb-ft
Operating weight56,320 lb
John Deere 9RX 640 Horsepower Details
Engine horsepower
640 hp
PTO horsepower
335 hp
Drawbar horsepower
640 hp
Rated engine RPM
1,550 rpm
Engine torque
2,179 lb-ft
Engine displacement
13.6 L
Engine model
the JD14
Operating weight
56,320 lb
Horsepower Comparison Chart
Engine horsepower comparison
This model
640 hp
Average
99 hp
Low
5 hp
High
640 hp
PTO horsepower comparison
This model
335 hp
Average
86.2 hp
Low
5 hp
High
490 hp
Drawbar horsepower comparison
This model
640 hp
Average
87.8 hp
Low
5.5 hp
High
640 hp
Operating weight comparison
This model
56,320 lb
Average
9,181 lb
Low
320 lb
High
56,320 lb
John Deere 9RX 640 Extra Horsepower Notes
Horsepower note
The useful spread on the John Deere 9RX 640 is small: 640 hp engine horsepower versus 335 hp PTO horsepower.
PTO note
With 335 hp at the PTO, the John Deere 9RX 640 is best matched to large PTO-driven equipment where the implement horsepower requirement matters more than the engine rating; large implements still need to be matched by PTO requirement, ballast, traction and transmission setup.
Drawbar note
Use 640 hp drawbar horsepower for pulling comparisons and 335 hp PTO horsepower for driven implements on the John Deere 9RX 640.
Power-to-weight note
Using 56,320 lb operating weight and 640 hp engine power, the John Deere 9RX 640 comes out at roughly 88 lb per engine horsepower, meaning it is light for its power, so traction and ballast can become the limiting factor before engine power.
Engine note
For engine identification, the John Deere 9RX 640 is listed with engine model the JD14, 13.6 L displacement, rated at 1,550 rpm.
Torque / RPM note
The John Deere 9RX 640 combines 2,179 lb-ft of torque with a 1,550 rpm rated engine speed, which fits a lower-speed tractor engine setup.
Official information note
Mistakes do happen. Horsepower, PTO horsepower, drawbar horsepower, weight and engine specs can change by year, market, engine option, cab, transmission and test standard. Please check the operator manual and official deere.com website for official information.
