The grills on this Rolls Royce reminds men of the greek pantheon but more in the roman style with small amounts of ornamentation. Rolls Royce have abstracted the pantheon by making it a 2 dimensional surface and also scaled it down so it would fit on a car although the ratio is relatively the same. The pantheon symbolises, logical(calculated) , stability, power and for it time perfection. Which Rolls Royce image is also along those line.

I found the fascinating how the grill of the car is more direct link to the ideology of the company than the logo. the logo is design to be simplified but every Rolls Royce car also must have the same style grill a very interesting way of branding compared with
other companies. Most companies would keep the logo
the same style but change the design of the car but
Roll Royce keep the logo and the grill, I think some
models were designed around the grill and some just
slapped it on the front because they had to, I believe
but have those types of design really adds to the
companies cultural aspect and characteristics.

Image from web site:

http://jiyolive.com/wp-content/uploads/2010/06/Rolls-Royce-Phantom.1.jpg