Shares in luxury automaker Aston Martin fell as much as 6.5 percent on their market debut in London on Wednesday as investors and analysts raised concerns over its ability to deliver an ambitious roll-out of new models.

The company, which last year made its first profit since 2010 and has gone bankrupt seven times, had priced its shares at 19 pounds each, giving it a market capitalization of 4.33 billion pounds ($5.63 billion).

The shares fell to as low as 17.75 pounds and were down 5 percent at 0935 GMT.

Aston Martin has plans to launch a new model every year from 2016 to 2022.

“(It) has very aggressive growth plans. The execution of that growth needs to be flawless - nothing eats cash more than a car company when the cycle turns. There is concern that it's more cyclical than the commentary has been,” said James Congdon, managing director of cashflow returns specialist Quest. “The banks have done a good job for their client - but there's no bounce.”

Aston Martin - full name Aston Martin Lagonda Global Holdings Plc - expects to produce around 7,100 to 7,300 cars in 2019, and 9,600 to 9,800 cars in 2020.