A genuine 190bhp RST more often than not can keep up with or do your average Stg1 Cossie.
I know for a fact a R5GTT with similar power can piss on them.
Youl have him top end for deffo, but from a 30mph or so rolling start ive seen RSTs and GTTs keep up or pull away to well over 100mph, and really, thats a win.
Id be a bit worried about the punto if its genuine, you may, you may not, no harm in trying.