The air pressure inside the tyre is as recommended by Honda. No matter what size tyre you use just fill it up with what pressure Honda has recommended. In Honda City tyre pressure is 32 front 30 rear. Even if wider tyres are installed the pressure inside is recommended to be kept the same. More air will have to be pumped in to inflate a wider tyre to this pressure.
So if your Pridor has a wider tyre just fill this tyre also with the same air pressure as recommended by Honda for the original tyre. Hope this helps 