I have been doing a lot with the newer Fiats these days, specifically with the 1.4 Multiair turbo. We are getting pretty good power out of these things. Anyway, here is a video of my shop car, a fairly hot 500L. Normally 500Ls are very slow, like 0-60 in 10-11 seconds. Mine is in the 7s.
Here is a video with some engine bay shots, side by side comparisons with Fiat 850s and an car acceleration run
http://www.youtube.com/watch?v=kM8lbJKamLQ