I know this is an old forum subject, but i have also owned a panda 4X4 and they are all 999cc to my knowledge, they have enough power but aren't as pokey as a normal 1000 panda as they have much lower gear ratio's.
For some reason most of the 4X4 models i see around now have around 100k+ miles...so, try and get one with an engine that's been looked after. Mine had 58k when i sold it and i still see it going around now...but lord knows what work has been done since.
Theyre good cars - but as with all small fiats, have their funny bits that you need to get used to.
:cool: