As far as potential goes, which engine is better: 3.8 or 3.9?

 

They're pretty much the same. The 3.9 is just a stroked 3.8, if anything the 3.9 might have minimal amounts of torque greater than the 3.8, but it's very minimal. They're pretty even.

 

I heard the 3.9L's are leftover Windstar (van) engines, that true?

 

yes

 

Even though they really are meant for vans, they are still just as good.

 

For some reason it just doesnt seem right! LOL

These types of things make me want a V8 again

 

Yes, thinking about having an engine also used in a minivan brings up all kinds of negatives. Just remember though that the PCM and the remainder of the drivetrain used in the Mustang is completely different, and a 3.9L is a very good performer when used in a Mustang with the normal mods (dual exhaust, CAI, gears, flash tune). Try putting those on a minvan....

 

Ford's commercial vans have triton V10s. It does suck to know that even the Mustang V8 doesn't have a bigger engine than those vans...

 

Watch out for those soccer moms - j/k.

 

HAHAH. I didn't know that, that's really funny.