Chevrolet is to debut a concept at this year's Paris Motor Show which it says is designed to celebrate the brand's motor sport heritage and push Chevy's styling language to the extreme. It's also a working vehicle ready for the racetrack, Chevy says.

The WTCC Ultra will be the focal point of the Chevrolet stand in Hall 5 at the Paris Expo, and is much more than just a styling study.

Beneath the bold exterior, styled by 25-year old designer Ewan Kingsbury, is - unlike most motor show concepts - a fully working vehicle ready for the racetrack, according to Chevrolet.

Chevrolet says that the concept illustrates Chevrolet's commitment to using GM's global resources. Kingsbury himself works for GM in Australia, while development work on the concept was carried out in the UK, Germany and Switzerland. The Ultra's engine was built in Korea, and the prototype was assembled in Japan.

It's equipped with a 190PS common rail turbodiesel engine, based on the 2.0-litre unit that will debut in the Captiva SUV and Lacetti models next year.

The concept exists as a vision of a new generation of World Touring Cars, and follows on from the success of Chevrolet's WTCC race team, which took its second victory of the season earlier this month at Brno in the Czech Republic.

The new Captiva SUV will also be shown in Paris. It will reach UK showrooms in the first half of 2007, later than originally planned following engineering delays to the RHD version.