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Underground Racing Lamborghini cracks 250 mph--watch the video

Earlier this year, we told you about Underground Racing, a shop in Charlotte, N.C., that makes a business out of upgrading Lamborghinis with twin turbochargers to boost engine output to more than 1,000 hp. Now, a Lamborghini Gallardo Superleggera upfitted by Underground Racing cracked the 250-mph mark at the Texas Mile event. Car owner Richard Holt made the 250.1-mph run in late March, but video was posted just this week.

GM, SAIC to develop electric cars in China

General Motors will work with its joint-venture partner, Chinese carmaker SAIC Motor Corp., to develop parts and vehicle platforms for electric cars, the companies said on Tuesday. The automakers will use their existing joint venture in Shanghai, the Pan Asia Technical Automotive Center, as the home base to develop the electric car--aimed primarily at the Chinese market. GM says it plans to use the platform, components and technology from the project to build electric cars around the world for various markets.

McLaren P1 (2013): powertrain revealed with 903bhp and electric driving

McLaren has revealed first details of the P1 supercar's hybrid powertrain. The headlines are: a combined 903bhp, 664lb ft, and the ability to drive 6.3 miles on zero-emission electric power. McLaren P1 powertrain: the details The engine is, as expected, an uprated version of the 12C's 3.8-litre twin-turbo V8.