Without an internal combustion engine or transmission tunnel, the interior of Model S has more cargo space than any other sedan in its class and includes a second trunk under the hood.

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With an expected arrival date in 2014 and six new Datsun vehicles planned, the new model will be extremely basic (think manual transmission and few, if any, airbags) and the consensus even among Nissan employees is that the release will be difficult to pull off.

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Cadillac's next generation CTS, due out later this year, will be 244 pounds lighter than the current model, and will offer an eight-speed automatic transmission.

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In the new study biostatistician Ira Longini at the Fred Hutchinson Cancer Research Center in Seattle devised a computer model to calculate the probability that such an outbreak pattern could occur without human transmission.

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The 201-horsepower, 2.4 liter model is more responsive, but it only comes with a six-speed manual transmission, a deal-killer for most buyers.

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Under the Hood: The Altitude model is equipped with a 5.6 liter V8 engine and a six-speed transmission.

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