Aston Martin to get a new engine

"This is a great deal for Aston Martin, which needed a bigger partner, and will give it access to new engine technology and save it a fortune on the massive cost of developing powerful and fuel-efficient engines and electronic systems," said IHS Automotive research director Christoph Stürmer.

Conversely, should Aston Martin's professional investors ultimately want an exit, Daimler could put itself in pole position to turn its initial shareholding into a strategic controlling stake assuming the partnership proves successful.

"Daimler has many other problems they need to address at the moment. But if they succeed there, then it wouldn't hurt to have an Aston Martin in your portfolio," said Stefan Bratzel, the head of Germany's Centre for Automotive Management.

Mercedes-AMG has three families of engine Aston could choose from -- an in-line four cylinder unit, a V8 and a V12 but Thursday's announcement specified the agreement was for the development of V8 powertrains, with no mention of whether the company would develop a new generation of V12 engines.

Aston Martin has struggled for growth since the economic downturn in 2008 and reported a 9 percent fall in 2012 profits during which time it sold around 3,800 cars - around 10 percent fewer cars than a year earlier. Ratings agency Moody's put its non-investment grade B3 rating under review late last year.

Aston sells some 15 percent of its vehicles in Asia but wants to significantly boost its presence in emerging markets.

Aston Martin rival Jaguar Land Rover has spent some $800 million over the last five years on marketing and expanding its dealerships in China, which is now close to becoming JLR's largest single market..