GL-i is 1.8 displacement; ?
GLx-i also has a displacement of 1.8, but it is configured a little more; ?
The displacement of GL is 1.6.
GL is the standard of 1.6. The standard of GLX is 1.8. GL-I and GLX-I are luxury configurations of 1.6 and 1.8 respectively. I stands for an engine equipped with dual VVT-I,