You don't get the usual rumbling of an idling engine, just the whisper-quiet whirl of the e-tron's motor (Audi is currently engineering an "e-tron sound" so that outsiders will be able to hear the car) and wind whizzing by.

ENGADGET: Audi A3 e-tron hands-on (video) Hands-on

The E-Type was introduced at the Geneva Motor Show in 1961, and a celebration was held this year, accordingly.

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"The title sponsorship costs for a Sprint Cup series race vary greatly from track to track, with variables ranging from market size to attendance, TV ratings and inventory included in the sponsorship package, " Mike Zizzo, spokesman for Texas Motor Speedway, said in an e-mail.

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In E-mode, only the 114-hp rear electric motor propels the vehicle and the TDI engine is shut off and decoupled from the drivetrain.

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Another important building block of e-commerce infrastructure involves activities described by Web Services Description Language, or WSDL. Oriental Motor, a Japanese distributor of industrial motors, relies on one of these programs to update the inventories and prices of the many parts it offers online.

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The new Panamera S E-Hybrid improves upon the concept offered by the previous Panamera S Hybrid with a more powerful electric motor, a higher-performance battery that supplies more energy and is able be recharged from home or public vehicle charging stations.

ENGADGET: Porsche Panamera S E-Hybrid plug-in model brings 416 guilt-free horsepower

"It is the worst gas guzzler I have owned since a 1976 Ford Elite, " he lamented of the Honda Motor (nyse: HMC - news - people ) car in an e-mail to the Bluewater Network, a San Francisco-based environmental advocacy group.

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