The Vauxhall Astra was the most popular car bought at retail outlets in Britain during October.
Some 8,804 people picked up the vehicle, while the brand sold 24,398 new cars overall – close to 2,500 more than its closest rival.
Compared to figures from the same period last year, Vauxhall has gained 1.62 per cent in industry share, taking their proportion to 14.95 per cent of sales.
In addition, the company added that its New Corsa was bought by 3,880 private buyers over the course of the month.
Bill Parfitt, managing director for Vauxhall, described the statistics as "a real achievement".
"Our efforts are paying off and this is no more evident than it is in the private retail sector, where customers are spending their own money," he said.
While Vauxhall was originally founded in 1903, it has been a subsidiary of General Motors since 1925.