BMW confirms X4 production

* BMW X4 sports SUV will be built * 580 million investment in US factory * Rival for upcoming Porsche Cajun...

BMW confirms X4 production

Production of the BMW X4 sports SUV has been confirmed.

The new X4 will be built in Spartanburg, South Carolina, where BMW will invest $900 million (580 million) to produce the sporting version of its X3 compact 4x4.

The four-seater X4 is expected to go on sale in 2014, and will be lower and more agile than the X3 (pictured). It's also likely that a high-perormance X4 M will be added to the new range.

Early design proposals suggest the X4 will have a more sporty look than the X3, with a more purposeful front end, a curved coupe-style roofline and sharply angled tailgate.

The rival to Porsche's forthcoming Cajun is expected to offer a choice of four- and six-cylinder petrol and diesel engines combined with a six-speed manual gearbox. An optional eight-speed auto 'box is also likely.

The investment at the Spartanburg factory will boost its annual production capacity to 350,000 vehicles by 2014.