Today on Green Car Reports: Automakers call for a delay in the implementation of quiet-car rules, how electric-car torque figures can be deceptive, and details on the 2015 Porsche Cayenne S E-Hybrid plug-in crossover. All this and more on Green Car Reports.

A comparison of the Fiat 500e and Chevrolet Spark EV shows how electric-car torque figures can be deceptive.

Everything you need to know about the 50-mpg Toyota Prius hybrid is included in our updated Ultimate Guide to every Prius article we've published.

A German magazine compares the BMW i3, Nissan Leaf, and Volkswagen e-Golf. See how these three electric cars stack up in their writers' view.

Automakers call for a delay in the implementation of quiet-car rules, which require near-silent hybrid and electric cars to sound alert noises for pedestrians.

The 2015 Porsche Cayenne S E-Hybrid is the German carmaker's third plug-in hybrid.

Could an intelligent seat belt end drowsy driving?

Finally, a new report continues rumors that the next Toyota Supra will feature a hybrid powertrain.

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