The dealership, which saw its turnover rise from £273.5 million to £318.7 million for the six months up to August 31, reached the agreement with United Auto group for a cash offer for its entire issued share capital.
David Holmes, communications director, said: 'Management stays in place and it is business as usual. There is a great deal of best practice sharing to be done over the coming months and that would include Sytner Vehicle Contracts.
'I see nothing but opportunity in all our spheres of operation.'
United Auto Group is the third largest Auto retailer in the US with 127 Dealerships in 19 US states, Puerto Rico and Brazil.