The Renault-Nissan alliance has been studying production of a $3,000 car to rival Tata Motors' $2,500 car in the Indian market, but Ghosn said no decision has been reached yet.
"We will go ahead with it if it's possible," Ghosn told a news conference at the Tokyo Motor Show.
"But we are confident, because somebody else is already doing it." Ghosn added that the partners would aim to launch the car to market in 2010 so as not to fall too far behind Tata.
Ghosn said he was scheduled to visit Bajaj in India next Monday to discuss the project, adding that most features of the car had already been decided.
"It's going to mainly be made by them, with our support," he said.
Last week, a senior executive at Bajaj, India's No.2 motorcycle maker, said he expected the feasibility study to be ready in "six to eight weeks".
Nissan had said last month it would decide whether to develop a $3,000 car next year, though it could not say when such a model would be ready for the market.
Tata Motors has grabbed the industry's attention with its bold plan to launch a "people's car" priced at 100,000 rupees, or $2,500. A prototype is due to be shown at an auto show in India early next year.
Tata has said its car would be a four-door model with a 600cc rear engine for both petrol and diesel versions, using moulded plastic and modern adhesives, with an initial production run of 250,000 to 300,000 units.
Nissan is also working on developing a separate family of entry-level cars benchmarked in price against Renault's popular 5,000-euro Logan model.
Shares of Nissan ended down 0.7 percent at 1,094 yen, in line with a 0.6 percent fall in the Nikkei average.