A few years back, we drove from Montréal to Cap Hatteras with a Hobie 16 in a Lumina APV (van) with the 3.1L.

The van was stock, no transmission cooler, no heavy duty suspension and it had 150000 milles.

The trip went very well, completly uneventfull.

The difference was that the van was harder on gas and since we has a cheap trailler with very small wheels, we were not driving very fast, never more than 75mph, usually around 65mph

I feel that a Van is much better than a car for hauling a catamaran because it already deflects part of the wind.

I own a 2000 Subaru Impreza with the 2.2L 5-speed. I have sucessfully hauled my Nacra 5.2 and my Nacra 5.7 over medium distances (600 milles). I even pulled the Nacra 5.7 in a snow storm. (remember, the 5.7 sits higher on the trailler because of the skegs).

In short, I am certain that your van will be perfect, even with the 4cyl. Just make sure that you have 5-10% of tongue weight.

On my car I used to go with 5% of tongue weightr but in my experience,t 10% is much more stable.