190 bhp is possible from a 1.6 without much hassle. I ran a 186bhp 1.6k for two years it was a great little engine. Basically its was just a ported head with slightly enlarge valves running on the standard valve inserts,Piper 740 cams, TBS and an Emerald ecu. IMO the 1.6 is a much sweeter engine to tune. I did an article for low flying ( DIY VHPD) detailing the work.