Bells, which had sites at Hyde and Ashton under Lyne, had amassed debts of around £2m.
Insolvency firm DTE Leonard Curtis has been appointed as administrator.
The business ran into trouble following the collapse of MG Rover. Sales of Rover cars accounted for about half of Bells' £17.5m turnover, said DTE Leonard Curtis director Paul Reeves. Bells also sold Nissan and Seat marques.
"Rover's demise undoubtedly had a knock-on effect on many dealerships," said Reeves.
"Bells suffered like others, the collapse affected prices and the Rover brand's credibility. As a result, the Bells dealerships are now closed.