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ZF boss thinks 9 speeds is enough for transmissions

The nine-speed transmission might be where the race to add gears ends, ZF Friedrichshafen CEO Stefan Sommer said. He referred to nine speeds as the "natural limit" because going beyond that number adds weight and complexity that cannot be offset by gains in fuel efficiency. "There is no hard line, but you have to consider the law of diminishing returns.

Nissan GT500 GT-R Race car: first official pictures

By Stephen Dobie First Official Pictures 15 January 2008 16:16 Nissan's new GT500 GT-R race car is a far cry from the Forum concept the Japanese company has just unveiled in Motor City. Nissan chose the past weekend’s Tokyo Auto Salon to show off their new GT-R racing car. Not content with the standard GT-R stirring up the establishment Nissan will enter their supercar into Japan’s Super GT Series.

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.