That record lasted only a few days, with Real following Kaka's signature with that of Ronaldo.
However, world and European player of the year Ronaldo claimed he is unfazed after becoming the most expensive footballer on the planet.
"The great players cost a lot of money and if you want them you have to pay it, I'm happy to be the most expensive player in the world," stated Ronaldo.
"Real Madrid have paid so much money because they wanted me and have considered it a fair price.
"I've been used to having pressure for a long time. In this sense, I'm calm.
"This price tag isn't something I'm going to think about when I go out on to the pitch, so it's not going to affect me."
However, Ronaldo conceded the level of expectation will be much higher than when he was at Old Trafford.
He added: "I know that they are going to demand a lot of me to be successful at the club and I know that I'm going to have much more pressure than at Manchester United because I was there for many years.
He (Ferguson) has been my father in sport, one of the most important factors and most influential in my career
"But it means a new challenge and is going to help me be the best footballer."
Meanwhile, Ronaldo says he will always hold a special place in his heart for his former manager at Manchester United, Sir Alex Ferguson.
Ronaldo spent six seasons at United and improved immensely under Ferguson's tutelage. The former Sporting Lisbon player also revealed he would return to Manchester in the next few days to say his farewells to Ferguson and other members of the United squad.
"He's been my father in sport, one of the most important factors and most influential in my career," said Ronaldo.
"I have to thank him for all that he taught me. He's been fundamental. I'll always have great affection for him and he will occupy a special place in my heart."
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