Quick answer:
The John Deere 6400 tractor has 100 hp engine horsepower and 85 hp PTO horsepower.
Engine horsepower100 hp
PTO horsepower85 hp
Drawbar horsepower74.8 hp
Rated RPM2,400 rpm
Torque298 lb-ft
Operating weight7,607 lb
John Deere 6400 Horsepower Details
| Engine horsepower | 100 hp |
|---|---|
| PTO horsepower | 85 hp |
| Drawbar horsepower | 74.8 hp |
| Rated engine RPM | 2,400 rpm |
| Engine torque | 298 lb-ft |
| Engine displacement | 4.5 L |
| Engine cylinders | 4 cylinders |
| Engine model | a 4.5L 4-cylinder |
| Operating weight | 7,607 lb |
Horsepower Comparison Chart
Engine horsepower comparison
PTO horsepower comparison
Drawbar horsepower comparison
Operating weight comparison
John Deere 6400 Extra Horsepower Notes
| Horsepower note | The useful spread on the John Deere 6400 is small: 100 hp engine horsepower versus 85 hp PTO horsepower. |
|---|---|
| PTO note | The John Deere 6400 has 85 hp available at the PTO, placing it in the utility tractor PTO range rather than a heavy-implement class. |
| Drawbar note | For plows, ground tools and pull-type loads, the John Deere 6400’s 74.8 hp drawbar horsepower says more than engine horsepower alone. |
| Power-to-weight note | At 7,607 lb and 100 hp, the John Deere 6400 works out to about 76.1 lb per engine horsepower, making it light for its power, so traction and ballast can become the limiting factor before engine power. |
| Engine note | The John Deere 6400 uses engine model a 4.5L 4-cylinder, 4.5 L displacement, 4 cylinders, rated at 2,400 rpm, which helps explain where its horsepower rating comes from. |
| Torque / RPM note | The John Deere 6400’s 298 lb-ft torque figure should be read with its 4.5 L engine size and 2,400 rpm rated speed. |
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.



