Torres pledged to repay the faith shown in him by the Reds' manager, Rafael Benítez, by establishing himself as one of the greatest strikers in the club's history. The Spain international promised he could handle the physical side of the Premiership, an aspect his compatriot Fernando Morientes failed to come to terms with after joining Liverpool from Real Madrid in January 2005 - he returned to Spain 16 months later having scored only eight goals in 41 league games.
"I don't have any fear of the responsibilities that lie in front of me at Liverpool," said Torres, who will wear the No9 shirt previously worn by legends such as Ian Rush and Robbie Fowler. "It's not something that worries me.
"I'm totally aware that the expectations here are extremely high and that people will want me to score lots of goals. I'm confident I can do that."
The arrival of Torres has created a wave of excitement in the red half of Merseyside even though Benítez's previous striker signing from Spain turned out to be a major disappointment. Morientes did not last two years at the club and the £8m signing complained bitterly of the physical treatment he had to endure in England after signing for Valencia in May 2006.
Yet Torres, nicknamed El Niño - meaning The Kid - because of his youthful appearance, is confident he can succeed where Morientes failed.
"I don't think adapting to the physical side will be a problem," the scorer of 91 goals in 243 Atlético appearances added. "I've seen Premiership games on television and I know it's harder to get a free-kick in England than it is in Spain."
Torres, who was linked with a move to Chelsea last summer, thought long and hard about leaving Atlético, the club he supported as a boy, before committing the next six years of his career to Liverpool. He spoke to the Liverpool goalkeeper José Reina on the phone as well as Luis García, who left Anfield this week to join Atlético.
"I have had offers from other clubs in the past but when I learned of Liverpool's interest I asked Atlético Madrid to listen to the offer," he said.
"I'm 23 years old and it's a great age to be making a move like this. I felt I had gone as far as I could at Atlético. I want to set myself new targets and goals and play in the Champions League. To be really considered a truly great player you have to play for one of the great clubs. Liverpool are a great club."
Torres has finished top scorer for Atlético in each of the past five seasons, but Benítez, who has now taken his spending to £121m since 2004, believes the player's scoring record can get even better.
"If you analyse the figures he was a footballer playing first-team football at 17 years old and it is very difficult to score goals consistently at that age," the Liverpool manager said.
"Then Atlético Madrid were not a top-four team and Torres was playing up front on his own. But if you read the comments of the Madrid supporters they say he couldn't have worked any harder for the team.
"To score the goals he has at his age, every season, shows he has great potential and he has the capacity to improve. I hope that at a big club surrounded by good players he will get even better."
Torres's arrival could mean the end of Craig Bellamy's Anfield career. Asked if the Welshman would be leaving, Benítez said: "Possibly. We have some clubs asking about him and it's a possibility.
"The only thing I can say is that Peter Crouch will be staying with us. I have said to Crouch that he must fight for his position and he will stay with us."