Quick answer:
The John Deere 420 tractor has 26.1 hp engine horsepower and 35.5 hp PTO horsepower.
Engine horsepower26.1 hp
PTO horsepower35.5 hp
Drawbar horsepower26.1 hp
Operating weight4,700 lb
John Deere 420 Horsepower Details
| Engine horsepower | 26.1 hp |
|---|---|
| PTO horsepower | 35.5 hp |
| Drawbar horsepower | 26.1 hp |
| Engine displacement | 47.7 cu in |
| Engine cylinders | 2 cylinders |
| Engine model | the Onan B48G |
| Operating weight | 4,700 lb |
Horsepower Comparison Chart
Engine horsepower comparison
PTO horsepower comparison
Drawbar horsepower comparison
Operating weight comparison
John Deere 420 Extra Horsepower Notes
| Horsepower note | For same-class comparisons, the John Deere 420’s engine horsepower figure is 26.1 hp. |
|---|---|
| PTO note | The John Deere 420’s PTO output is 35.5 hp, about 135.8% of its 26.1 hp engine rating, so PTO implement choice should be based on the PTO number. |
| Drawbar note | The John Deere 420 separates pulling work from PTO work with 26.1 hp drawbar horsepower and 35.5 hp PTO horsepower. |
| Power-to-weight note | The John Deere 420’s weight-to-power figure is about 179.7 lb per engine horsepower; that means it is balanced enough that both traction and horsepower matter. |
| Engine note | The John Deere 420 uses engine model the Onan B48G, 47.7 cu in displacement, 2 cylinders, which helps explain where its horsepower rating comes from. |
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.

