I'm not really sure I understand your question, but it depends on the accent. RP/Queen's English deletes all Rs unless they are followed by a vowel but other accents pronounce the R. Yorkshire, Bristol, and Somerset accents, for example.
Somerset accent
Here's a full distribution of rhotic and non-rhotic English accents
I'm curious to see how Spanish speakers would interpret it. Most Spanish dialects do not differentiate between b and v.
Edit: I vote we make one big "Video" megathread.
Edit 2: I haven't had a Linguistics Boner this hard since I graduated from college.