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Watch Tesla Model S testing new titanium armor

In a missive signed by Elon Musk himself, Tesla announced it would be adding titanium plates and aluminum deflectors to all new Model S sedans and offering free retrofits for the 20,000 or so existing EVs. The company earlier offered an over-the-air software update to raise the ground clearance of the Model S so the car would be more likely to clear dangerous road debris. The actions were in response to well-publicized fires in the electric luxury sedans.

Porsche Panamera explained in greater detail

Porsche has revealed previously undisclosed details of its new Panamera ahead of a planned public debut at next month's Shanghai motor show. On sale in North America on Oct. 17, the first-ever Porsche sedan will cost more than the BMW M5 and the Mercedes-Benz CLS63 AMG, with prices starting at $89,800 for the base rear-wheel-drive Panamera S and rising to $93,800 for the four-wheel-drive Panamera 4S.

Used cars 'getting cheaper'

CONSUMERS holding on to their motor for longer are driving down the cost of used cars, according to new research. The average price for a second-hand car in July-September 2011 was £8,870 - a 2.4% decline compared with the same period a year ago, according to the Auto Trader company. It is the first time the price has dipped below £9,000 since the company started tracking the market in January 2010.