Allison V-3420

V-3420
Allison V-3420 Engine
TypeLiquid-cooled W-24 piston engine
National originUnited States
ManufacturerAllison Engine Company
First run1937
Major applicationsFisher P-75 Eagle
Number built150
Developed fromAllison V-1710

The Allison V-3420 was a large experimental piston aircraft engine, designed in 1937 by the American Allison Engine Company.