General Motors to offer car sharing via mobile app and OnStar

General Motors has partnered with a San Francisco-based start-up company named RelayRides to enter the car-sharing business. In early 2012, GM vehicle owners in California will be able to use the OnStar system to rent out their cars when they aren't using them. The service will available nationwide for OnStar subscribers by the end of the year.

Tesla Model X SUV will ONLY be available with four wheel drive

The Tesla Model X (pictured) will only be available with 4WD The Tesla Model X does promise to be a very appealing SUV, even if its main USP for business users – zero BIK – will have been scrapped by the time it arrives in the UK. When it does arrive, prices are expected to be similar to the Model S Saloon and, just as with the Model S, Tesla are planning a variety of battery capacity options and, we thought, an entry-level rear wheel drive model. But Green Car Reports, in response to a reader enquiry, has got confirmation from Tesla that they have now decided that all Model Xs will come only with the 4WD powertrain fitted.

17 definitive concept cars feature in new Atlanta exhibition

Atlanta's High Museum of Art is gearing up for the opening of a new exhibition featuring some of the world's most influential concept cars. Dream Cars: Innovative Design, Visionary Ideas runs from 21 May to 7 September and includes 17 concept cars – and associated drawings and models – from the 1930s to the 21st Century. The aim of the exhibition is to demonstrate how these vehicles shifted the notion of The Car from that of a purely functional device to an embodiment of future possibilities.