Less than a year after its launch in China, sales of the new Buick LaCrosse have reached 100,000 units. The LaCrosse is the fastest-growing member of China’s premium upper-medium sedan segment.

In the first six months of 2010, the LaCrosse 3.0-liter SIDI model accounted for nearly 80% of the segment (upper-medium sedans priced over RMB 300,000, or roughly US$44,200).

The LaCrosse was introduced as a redesigned model in the US in 2009, offering a standard, direct injected Ecotec 2.4L four-cylinder engine in the CX and CXL FWD models. That engine delivers an EPA-rated 30 mpg on the highway and 19 mpg in the city. The 3.6L direct injected V-6 is available on the CXL and CXS models provide 17 city/27 highway fuel economy ratings.

For the first six months of 2010, US sales of the LaCrosse reached 30,409 units, a 206% change by volume from the first 6 months of 2009.