[John Wood]

Your minivan has different gearing in the transmission for one thing. It is a small difference but you might feel the difference.
The other possibility is how open the exhaust is. I don't know if you are required to have converters on both vehicles, but if one is slightly restrictive, it will feel a bit more sluggish. Since these are old vehicles, one engine may have less compression than the other.

 

[Kevin1990]

Your minivan has different gearing in the transmission for one thing. It is a small difference but you might feel the difference.
The other possibility is how open the exhaust is. I don't know if you are required to have converters on both vehicles, but if one is slightly restrictive, it will feel a bit more sluggish. Since these are old vehicles, one engine may have less compression than the other.

Yeah you´re right.....the Saratoga ain´t got a cat. converter any more....
Yes the gear ratio is almost a big difference, i recognized it on my first drive.

The minivan still has the orig. exhaust system, but pretty rusty. I´ll install a new cat by Magnaflow and a Walker Sound FX muffler, curious about the result.