Turners became the name for the group after Dorchester Pacific acquired Turners Auctions in 2014 to complement its largely automotive loan book and insurance business.
It survived the collapse of many finance companies in the wake of the global financial crisis. Since then, it has been on a buying spree, adding Levin-based lender Oxford Finance, Greenwich Life Insurance and Christchurch-based Southern Finance.
The acquisition of Buy Right Cars will add eight dealer sites across Auckland and a workshop recently set up in Manukau.
The unit is expected to add more than $4 million to earnings before interest and tax under Turners' first year of ownership, rising after that.
Chairman Grant Baker said the company is still looking at other acquisitions.
Buy Right Cars's vendors include founder Brandon Orlandini, who owns 85 per cent with Ivo Orlandini and John Radley, and general manager Qiuchee Wong, with 15 per cent.
Turners shares rose 1.7 per cent to $3.05.