The Saints have lost just once ahead of their meeting with Swansea City on Sunday and lie in seventh place in the Barclays Premier League.
The 25-year-old midfielder has been a part of the club's rise from League One and feels that manager Mauricio Pochettino's squad has the potential to maintain their current form.
"I think we've got the perfect blend," Lallana declared. "We've made shrewd additions, but we've still got a good group of players that have been here since the League One days that know the club, and we're starting to find out different aspects of each other's games. I think that's going to grow as the season goes on.
"We were happy with our pre-season and with the additions we've made to the core of our team. I wouldn't say we had an official target but we've had a good start and we want to stay in the top six. I think we've got a good opportunity to get three points at the weekend."
Pochettino has been backed in the transfer market by the club's owners, with midfielder Victor Wanyama and striker Dani Osvaldo among those bolstering the Argentine's options last summer.
The effect of the new signings has pleased the long-serving Lallana, who joined the club from Bournemouth when aged 12.
"It proves that they're backing the club, the manager and the players who are already here," Lallana added. "It's lifted the quality in training, and when there's competition for places, it raises the standards."