Tuning means 2 things usually.
1) Making the car go faster. The cheapest way to do this with a 1.6 147 is trade up to a 2.0 147. unless you want to spend money and maybe get another 10 bhp max. Add on BHP always costs money. The easiest are to chip the engine, and put a better exhaust on. Any other power mods are not economic sense
2) make the car feel better. This is probably the best tuning for a 147 1.6. IMHO. Brakes and suspension.
If you have ever watched that car show where people who have modified their cars put them on the rolling road.......most of them either have no gains or LESS power than standard, so lots of money is wasted massaging egos.