This the new Buick Excelle, a four-door version of the Vauxhall Astra that will initially go on sale in China and then North America.
Dubbed the 'baby Buick', the car sits on GM's Delta II architecture, which also underpins the Chevrolet Cruze and Volt.
The car gets a range of small engines including a pair of turbocharged petrols, a 140bhp 1.4 litre and 180bhp 1.6 litre. A diesel option is also expected to be offered in China.
A GT model has also been mooted; it would get a turbocharged 220bhp 2.0-litre engine.
Buyers will get the option of six-speed manual and automatic gearboxes.