DETROIT — Chrysler, the third-largest Detroit automaker, said on Monday that its third-quarter profit rose 80 percent on the strength of new models, less debt and steadily growing sales in both American and international markets.

The company said it earned $381 million in net income, up from $212 million in the same period a year ago. Revenue for the quarter was $15.5 billion, an 18 percent increase from $13.1 billion in the same period last year.

The results could be seen as the latest evidence that Chrysler’s improbable comeback from its government bailout and bankruptcy was not only sustainable, but accelerating.

“We’ve changed the conversation at Chrysler Group,” said Sergio Marchionne, the chief executive of both Chrysler and its Italian parent, Fiat. “We continue to work feverishly and are pleased to see that our all-consuming aspiration for excellence is translating into results.”