Right I've been doing a little research and I've come across a proto type 1.6 ally block OCH that has 101ish bhp now they are as rare as hens teeth I believe as I can't find anything else about them so my question is

Does anyone know what's different between these engines and the usual 1.6 you see

Bigger pistons ect?

Thanks in advance

For Felicia Škoda made its own 75 kilowatts (102 PS; 101 bhp) aluminium 1.6 OHC engine, which appeared in some racing Favorit prototypes, but Volkswagen decided to put its old 1.6MPI 55 kilowatts (75 PS; 74 bhp)

What I found

Czech engineers from Skoda designed many unique high quality high performance engines but VW gagged them. VW policy is "make a lot of cars fast exactly as we tell you". Czechs absolutely hate VW for their master-to-slave policy.

Yes 102hp with a lighter (all aluminium) engine would be great wouldn't it. Not only faster but lighter at the front for better handling.

You can only wonder where Škoda would be today if they could have stayed independent but at the time they did need investment. Before VW they held talks with Renault but all they wanted was someone to build old Renault's cheaply so they went off and bought Dacia who spent the next 15 years building Renault 12s so it could have been a lot worse. Or I could just say MG Rover, to see what happens without investment or partnership.

I think this is it.