Ferrari boss satisfied with cuts
Montezemolo, who is also Formula One Teams Association president, met FIA boss Max Mosley and Toyota's John Howett in Geneva on Tuesday.
"Finally we will have an economical Formula One," Montezemolo told Gazzetta dello Sport.
"Next year we will lengthen the life of engines to three races (from the current two). This will translate into a total of 25 engines that for the smaller teams will cost 10 million euros (£7.86m) a season."
Mosley had said that, even without the global credit crunch, the sport had become unsustainable at the current level of spending and faced serious problems if costs were not slashed by 2010.
The season-ending Grand Prix takes place in Brazil next week and a further meeting between the teams and the FIA is planned after the race.
"We have decided with president Mosley that we will meet again after Brazil to talk again about limits to the chassis and engines in the future," Montezemolo added.