Is it possible? I see the SL and Base model weigh less than the VR4, have no idea why.
That's because they are FWD and that saves a bit of weight over the AWD drivetrain of the VR4. Also the TT system and more luxurys on the VR4 add a bit of weight. I'm sure it's swappable (of course forget swapping the AWD tranny in), but who would really want a 3500lb *FWD* 320hp/300tq car? Either get a VR4 and have the extra go or just deal with the slowness of the FWD SL.
why are front wheel drives so slow and bad?
Because they only have 220hp and weigh 3400lbs (and FWD certainly doesnt help). That equates to 1/4 mile times in the mid 15s (which is what I've seen constantly out of FWD 3000GT's).