Selecting horn for 2" driver

Hello all,

I would like to know if there would be major performance issues if I pair an RCF ND850 2" driver with an RCF HF94 1.4" horn since I have these equipment available to use at the moment. I am aiming for a frequency range of 2khz-20khz. It will be used in a vehicle so space is limited on the horn sizes I can choose.