Cole believes the calibre of such players proves that West Ham are able to attract big names.
"It is a boost for the club and shows where we are going," he said.
"Andy Carroll is a young, England centre-forward and clubs do not usually sell them and he is a big talent. He did a good job and we just want him to get fit and come back because he is a big part of our team.
"West Ham is a big club but it has been starved of success. You look at where we are in London and people want to come here and play in London and play for West Ham.
"It is great that players like Razvan and Andy are coming in and hopefully there will be a few more as well."