More than 4,870 cars were sold in August, according to figures from the Society of the Irish Motor Industry, up almost 32% on the same month last year.
It follows a particularly strong month in July, which coincided with the introduction of the 142 registration plate, and puts car sales more than 30% higher over the course of the year so far.
Around 89,280 cars had been sold by the end of last month, according to SIMI, compared to 74,366 in all of 2013.
Volkswagen continues to be the most popular car brand in the country, representing 12.2% of all sales in the year to date.
Meanwhile more than 10.5% of cars sold in 2014 were made by Toyota, with Ford representing around 10% of sales.
The Volkswagen Golf is still the most popular model of car, with 4,170 sold between January and August. Nissan’s Qashqai is the next most popular model in Ireland, followed closely by the Ford Focus.
More than 67.5% of cars sold so far this year fell into the ‘A’ tax band, a rise on the proportion in 2013.
Meanwhile, 73.4% of all vehicles sold in the first eight months of the year run on diesel, with most others being petrol-based.