Volkswagen won't be adding any more brands to its portfolio any time soon after CEO for the German giant Martin Winterkorn called a halt to its buying spree.

The German car manufacturer recently acquired Italian motorcycling icon Ducati and spent $5.6-billion on acquiring the rest of Porsche.

"We have enough to do at the moment in taking our twelve brands to where we want to be," Winterkorn told German newspaper Handelsblatt.

Rumours of more acquisitions though won't go away, with talk of a move for Malaysian carmaker and Lotus owner Proton said to be in the offing. There has also been talk of Volkswagen making a move for Fiat's Alfa Romeo brand.

"That I find Alfa Romeo an interesting brand is not a secret," Winterkorn said. "But we are currently busy enough with our brands."