Liverpool paid £20million for Aquilani in the summer but the Italy midfielder is only now reaching full fitness after recovering from ankle surgery.
Italy legend Totti played with Aquilani in the Italian capital and the World Cup winner told Liverpool's official website: 'Alberto is an incredibly talented player, with great technique and an excellent understanding of the game.
Getting stuck in: Aquilani was keen to get involved against Birmingham
'He also has a powerful shot with both feet - he really is a complete midfielder.
'Alberto can play in any position in the middle of the park really, either a bit forward or a few steps behind.
'The advantage he has is that he really understands the game and has great vision - he is dynamic and can make the last pass or try to score himself.
When in Rome: Aquilani's pal Totti
'Here at Roma, with our 4-2-3-1 strategy, he was playing in front ofthe defence next to Daniele De Rossi or David Pizarro, but also as anattacking midfielder just off me. I think he can do very well in a4-4-2 as well.'
Aquilani, 25, has made just two susbstitute appearances for Rafa Benitez's side.
Totti added: 'He has been unlucky with injuries so far but I believe he will do really well in England. We are really good friends. We keep in touch even now that he has left us.
'He is elegant and smart - these are his main characteristics. Potentially he is one of the best in the world.'
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