Plug-in hybrids in emission-free electric mode may contribute to the reduction of smog.

In electric mode the Volt's rating is estimated with the same formula as an electric car.

At low speeds it runs solely in electric mode, while the electric motor also boosts acceleration when required.

They're engineering an exterior noise for the bus when in electric mode.

Speeds of up to 130 km/h in electric mode.

At low speeds, says Citroen, the Metropolis runs in zero emission electric mode.

This energy is saved in a storage battery and used later to power the motor whenever the car is in electric mode.

I sought to stay in the fuel-conserving electric mode and tried not to take advantage of the car's quick acceleration.

The intent was to produce a vehicle which could operate on the engine in the country, and electric mode in the city.

In the electric mode the concept reaches a maximum speed of 120 km/h.