The Chevrolet Volt is a hybrid and electric cars, will release in 2011 and reach a fuel rating of 230 miles per gallon in the city is more fuel efficient vehicles on the road safely to the environment.

This car can travel up to 40 miles on a battery in which a small gasoline engine kicks in and power the car and when recharging the battery. The battery can be recharged in eight hours out maximum cost about 40 cents.

E-Tron The original concept was slightly smaller than the Righteous car Audi R8 sports. This version has Detroit steps smaller than the Audi TT. Riding on a wheelbase of 95.7 inches and with a total length of 154.7 inches, the E-Tron Detroit concept is about 10 inches shorter than a TT.

The E-Tron concepts in Detroit:

- Have two electric motors each driving one rear wheel.

- The combined production is 204 hp and a claimed 1955 pounds – ft of torque, which is like 300 to 400 lb-ft of real life.

- It takes Audi LED headlights a bit further by adding an automatic system that adapts to changing weather conditions using a camera-computer;

- Light can also change the shape of the beam for maximum visibility.

- As seen on the A8 in 2011, the lighting system uses the database to enable navigation lights turn when the car anticipates that you will change direction.

- This e-Tron can use a phone as an address database, navigation system and video player. It also has the ability to accept remote commands from a phone, including the adaptation of the sound system or transmitting routes for travel. The car can also talk back to a designated telephone, communication of safety information or the completion of (or need more) pricing attached to a charging station.

Both engines on the show car can operate independently make the most of the agility of available traction during aggressive driving with guidance system.

Features: It also has a brake-by-Wire “and as the first e-tron, a special generator that allows the regeneration of braking energy.

Specifications: – The lithium-ion batteries weigh 880 pounds, located just opposite the rear axle, and weigh a total of 2976 pounds, or about 200 more than similarly sized Tesla Roadster.

- Audi claims a division 40/60 and a weight of 0 to 62 mph, a time of 5.9 seconds. Top speed is limited to 124 mph.

- By comparison, the Tesla is much faster have clocked version of the sport to 60 mph in four seconds flat, while its top speed is 122 mph. The E-Tron Detroit would have a range of 155 miles on a full charge, which takes 11 hours with a current of 230 volts or just two hours if you can find a special 400-volt charging station.

The BMW Vision EfficientDynamics delivers 43.5mpg on the combined cycle and just 172g/km of CO2 emissions.

The 2.0-litre four-cylinder diesel engine in the BMW Vision EfficientDynamics uses BMW’s Variable Twin Turbo concept, third-generation common-rail injection and an all aluminium crankcase to deliver 204hp and 400Nm of torque between 2,000 and 2,250rpm.

The power harnessed by the batteries is also supplemented by roof mounted photovoltaic solar panels, measuring 1.0 metre square.