How do you know if....
 

How do you know what engine is in the mustang, i know its a 4.6L 2v v8 a Romeo or a windsor? how do i know what engine i have?

There are subtle difference just looking at them. For example, the head covers have a different bolt arrangement I believe.

I think in mid 2001, they changed from windsor to romeo.

Yours is a Romeo. Romeo valve covers use 11 bolts vs. the Windsor's 13. Also, Windsor blocks have a W casted on them.

Which one is better? or they the same?

the blocks and heads are functionally identical. The only difference between them really is where they're assembled and thus what vehicles they see service in. There was a brief time where windsor motors made it into gt's but that era is gone. It's only going to matter in a very real sense for clutch selection (knowing how many crank bolts there are) and for valve covers and valve cover accessories (but not for propane or propane accessories).

Thanks for the correction.

Isn't there a difference with the crank? I have a windsor..

and i got the romeo.. Either or stonger or they both the same?

yes, windsors have 8 bolt cranks and the romeos have 6 bolt cranks. also on a side note as far as differences go 99 to 01s i believe have the t45s in them and i think in 02 they went to 3650s. not really sure on the year change but i know there was a transmission change in their somewhere.

they are the same. mine has a windsor, and the wifes has a romeo.

The main difference in the engines internally is that the counter weights are shaped differently (not 100% sure but I thought I heard this), the main caps are set w/ dowels (Windsor) as opposed to jack screws (Romeo), and the camshaft is held down by individual caps (Windsor) vs. a girdle (Romeo). Also, Windsor engines have pressed on cam gears while the Romeos have bolt-ons. Strength wise, both are probably around the same.

you are correct...my 02 has the 3650.