Alonso misses the push of a top teammate
The pair were teammates at McLaren in 2007, before Spaniard Alonso fell out with the Woking based team's management and returned to Renault.
Since then, the sister Renault has been piloted by Nelson Piquet, but in 22 starts the Brazilian is yet to outqualify his illustrious teammate.
Recalling his season with Hamilton in the adjoining garage, 27-year-old Alonso said in Barcelona: "We had a good competition which helped each other to find our limits.
"I can say that maybe I am missing that competition in a way because, as I said, it was quite fun to really push and find new limits from ourselves," he added.
Alonso insists his problems were with McLaren's "big bosses" rather than Hamilton, and had kind words for the reigning world champion when asked about the damage done to Hamilton's reputation by 'lie-gate'.
"I think to really help the reputation or whatever has been damaged, I think will be very easy if he keeps winning," said Alonso.
"The maximum we can do is driving the car, winning races, winning championships. This is the best thing you can do," he added.