Frequently during the many discussions of New York Central Hudsons the subject of which are scale size and which are not comes up. Here are a couple of line drawings taken from Staufer's Book "Thoroughbreds". Now you can measure your own engines and come to your own conclusions.
I've taken a few measurements of the Lionel Vision Hudson and found it slightly oversize. The length is within a few inches but its 6" taller at the stack and about 4 inches wider at the cab. I hope to get a chance to take a few measurements of the K-Line Hudson soon.
Pete