I had a 2010 308 1.6 turbo for 1 week and it was fast and smooth but it was factory fitted!
modification is not allowed for daily use road car so please note that if you go for aftermarket modification RTA may not permit renewing the car registration which even harder than losing the warranty as you spent money and time and to continue driving you have to remove it all to stock condition!
so Technician proposal is more safe and applicable and the stock 308 1.6 turbo is about 160 Hp and you can find the same engine in Mini turbo but the variation on the turbo waste gate and inter-cooler brackets.
Even easier still is to just a buy a turbo model straight off the showroom floor. As @Technician rightly says, this type of modification is a real pain in the butt, and I would not advise it uness you have unlimited time, money, and patience.
The easiest and best thing you if you want a turbo can do is phone around the scrapyards in Sharjah and see if you can find someone with a crashed 308 GTi and ask them to sell you a front cut, complete with engine, gearbox, wiring, ECU, key and switch etc. then swap everything over onto your own car. They come with a 1.6 turbo engine and around 200 BHP. Fitting a turbo onto your own engine will be a real headache. Before I came to Dubai, I was in the process of turboing my Peugeot 205, diesel though but I'm also going for the 200 BHP mark. I spent a fortune on parts and most of them weren't easy to find as it's such an old car. Maybe I'll finish it someday.
@amidThose guys who get Patrol and LC mod with turbo has a proven history of doing things right including flashing the ECU with new program, as there are 100's of car they have installed before.
@Shams the key for you is to find a garage who carry out such mod and ask them for full cost and guarantee before pursuing.
There was a guy here before who was great with Peugeot advices theo @207_gti consult him for his experience in Peugeot mod, I am sure he knows lot of in and out of Peugeot world.