trust me 20v is the best

on a serious tip, iv had em all
8 and 16 harldy owt in it. 16v revs longer but feels slower off the mark.. well the green one did i got compaired to my old 8v lump. that said the Head gasket went on the Green valver
if i was to do it all over again, id go for a 16v car as the base to start a project on, its easier to upgrade the engine to something better on these as they have the all important gearbox, and other parts which will be needed
so in a nutshell, id have to say out of 8v or 16v - 16v wins
but my old 8v never let me down and was pretty nippy