Aston Martin, purveyors of fast cars to a fictional British spy and to real-life billionaires, could be partly owned by Mahindra and Mahindra
But much is unclear as the British maker of James Bond's sports cars, its Kuwaiti owner and a rival Italian bidder keep their own counsel.
"There are a lot of moving parts here," a person with direct knowledge of the matter told Reuters on Monday, adding the Mahindras hoped to strike a deal this week.
The source told Reuters that an initial 40% stake could rise to 50% for a total price unlikely to top $400 million.
Kuwait's Investment Dar, which led a private acquisition of the luxury brand from Ford in 2007, denied on Sunday that it was reviewing two bids for 50% after sources said Mahindra had outbid Italian investor InvestIndustrial.
The person familiar with the deal said on Monday, however, that bidders were wrangling over issues on management control.
Analysts have said that Investment Dar, which went to the market for a $1-billion debt restructuring last year after buying Aston Martin for 479 million pounds, or $925 million at the time, had been hoping to recoup what it had sunk into the company - meaning a value for the firm of about $1 billion.
InvestIndustrial bid between 200 million and 250 million pounds for a stake, a source had said earlier. The company again declined to comment on Monday.
An apparent lack of interest among major car makers, such as BMW, Daimler or Toyota, may have left the way open for the likes of InvestIndustrial, which bought and sold Italy's Ducati high-end motorcycle brand in recent years, and Mahindra, the world's biggest tractor maker, which has seen compatriots at Tata Motor do well in buying Jaguar Land Rover four years ago.
Tractors and James Bond
Nonetheless, some analysts questioned the logic of linking the Mahindra family to Aston Martin - though the 99-year-old British firm had its heyday in the 1950s and 60s been owned by another tractor man, Yorkshire magnate David Brown, founder of the classic DB model line beloved of Agent 007.
"It's difficult to visualise a tractor and an Aston Martin in the same garage," said Mads Kaiser, a Silkeborg, Denmark-based fund manager with JI India Equity Fund, which owns Mahindra shares in its $200-million Indian equities portfolio.
"The acquisition will broaden their portfolio but doesn't add anything to their tractor or India portfolio."
Shares in Mahindra fell more than 3% on Monday.
Investors will be wary of the risk of "trophy acquisitions" that a tempting, vanity brand like Aston Martin might pose. Its machines have most lately been on display in the new James Bond blockbuster "Skyfall", being promoted globally in recent weeks.
Movie fan Anand Mahindra, whose family company is one of India's biggest businesses, studied film before going on to take his MBA at Harvard and has plenty of cash at his disposal with a corporate debt-to-equity ratio of 0.29 at the end of March.
But Ashvin Chotai, managing director of consulting firm Intelligence Automotive Asia in London, said, "Aston Martin technology is so far beyond anything that Mahindra is doing at the moment that it's hard to see any synergies either way. The main thing Mahindra would bring to Aston Martin is money and maybe resources.
But they're not bringing a lot of experience."
For Aston Martin, analysts say, sales of only 4,200 cars last year and tight margins mean that a boost of investment would be welcome to refresh its model range and, notably, build new engines as new European Union emissions criteria loom ahead.
"We view this bid with caution as we believe the latter will require significant investments in R&D and benefits of technology transfer to M&M's product portfolio is questionable given little similarity between portfolios," Indian brokerage Edelweiss Securities said in a research note.
Costs including research and development and sales account for about 25% of sales at Aston Martin, compared with 12-14% at luxury car rivals such as BMW
"Large investments could be required to expand product portfolio and distribution reach," the report said.
"We are in favour of a deal that secures the future of the company and injects capital," said Tim Parker, a regional officer for the union. "We have doubts about private equity because of the reputation the private equity industry has with regards to cutting costs. We are more positive on the Indian company which has a reputation and a stake in the industry."
Mahindra has had mixed success in its overseas forays. It pulled the plug this year on plans to roll out a pickup truck in the United States, although it has made progress turning around Ssangyong Motor Co, a money-losing South Korean SUV maker it bought for $460 million in March 2011.
It has been looking for acquisitions to expand its portfolio and gain access to new markets. Earlier this year, it was reported to be interested in buying at least part of Swedish carmaker Saab Automobile, later bought by a consortium.
Shares in Mahindra ended down 3.35% on Monday to close at 922.05 after hitting a record high earlier in the day. The broader market closed 0.16% higher.