The number of new private cars licensed for the first time increased by 2.9% to 3,390 in June 2014 compared to the same month last year.
Used (imported) private cars licensed for the first time were up 7.6% to 4,502 for the same period.
In total, there were 62,280 new private cars licensed in the year to the end of June 2014, a rise of 25.8% compared to the same period in 2013.
The corresponding figure for 2014 in respect of used (imported) private cars was 27,601 and this was up 16.5% from 2013.
The number of new goods vehicles licensed in June 2014 was 1,101, up 47.8% from June 2013.
The total number of all new vehicles licensed during June 2014 was 5,123 compared with 4,609 during the same month in 2013 - an increase of 11.2%.
The highest number of new private cars licensed in June 2014, classified by make, was Volkswagen (515) followed by Ford (325), Toyota (296) and Renault (249).
For the year to the end of June 2014, Volkswagen also ranked highest with 7,558 for new private cars. This was followed by Toyota (6,775), Ford (6,133) and Hyundai (5,084).
In June 2014, the total number of all vehicles licensed was 11,101 compared with 10,060 in the corresponding month last year - an increase of 10.3%.
The licensing figures refer to vehicles taxed for road use only and classified by taxation class.
Licensing differs from registration in that a vehicle is licensed when a valid motor tax disc is issued for the first time. Registration occurs when a vehicle gets its licence plate (registration number) for the first time.