Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Tesla system will swap a Model S battery in 90 seconds

"This is the title fight," said Elon Musk, in typical brashness. "This is battery-powered versus gasoline." The Tesla CEO preached this to a crowd of Tesla owners and supporters while formally confirming the company's worst-kept secret: the fact that the Model S sedan's batteries were designed from the beginning to be swapped out. The system Tesla envisioned has plenty of ambitious, techno-wizardry automation, with a focus on as much convenience as possible: The Model S will drive over a pit containing machinery which automatically changes the battery from underneath in approximately 90 seconds -- and the driver doesn't even have to get out of the car.

Mini Paceman

Mini has presented its latest model, the Paceman, as it ventures into a new vehicle class. Appearing – almost to the millimeter, bar colour and trim detailing – to be the Paceman concept seen at NAIAS 2011 in Detroit, the Paceman Sports Activity Coupe features many traditional Mini design cues. Where it moves away from them, it is in keeping the new-style squared off front lamps of the Countryman (with which it shares a front end up to the base of the windscreen) and a roofline which tapers down much more than we've seen in any previous ‘new' Mini before.

Audi Urban Concept

Audi has released additional photos and information on the Urban Concept, which is set to make its debut at the Frankfurt motor show in September. As we previously reported, the new car – touted by Audi as a 'new kind of concept car' that combines aspects of a racing car as well as a fun-to-drive urban vehicle – is a diminutive two-passenger vehicle powered by two e-tron electric motors. Measuring in at 3200mm long, 1700mm wide and 1200mm tall, the Urban Concept is expected to weigh less than 500kg, thanks largely to a cockpit made from CFRP.