This can be viewed in \System\build.prop
The real LCD density for the Gran Duos is 187 PPI
In The Stock rom, with android 4.2.2 the LCD Density is set to 240, but this actually causes the objects in screen to look larger and occupies more space than it should.
Well this happens because android system try to compensate the resolution of screen, (Better resolution = More Density)
The android system, makes a scale for application, which leads the applications to resize elements in a scale factor of 1.5x
So every thing you see on ower Galaxy Grand is 1.5x bigger than it should be.