The premium Swedish carmaker sold 2,382 last month, resulting in a 1.27% share of the total new car market.
Whilst total new car registrations declined by 3% in May compared to the previous year, demand for Saab's cars grew by 24%. For the first five months of the year, Saab's registrations increased by 37% on 2004, at 11,229 cars.
Saab reported a 78% increase in 9-3 Convertible registrations during the month.
Saab GB managing director, Jonathan Nash, says: “2005 is proving to be a truly monumental year for Saab GB, building on our success in 2004. With dealers now taking orders for the 9-3 SportWagon, and with our fastest-ever road-going engine on its way – the all-new 250bhp 2.8 litre V6 Turbo – I am confident that this year can only get better for us."