A two - cylinder gasoline generator can be fitted as an option to extend its range to approximately 150 miles over the 96 miles of the battery - only version of the car. (autobytel.com)
Outside of the vehicle the gasoline engine is significantly louder, however, emitting an annoying buzz that sounds a lot like a cheap gasoline generator or air compressor. (cnet.com)
For 2016, the current Volt is being replaced by a redesigned, second - generation vehicle that delivers enhanced fuel economy from its revised gasoline generator, better performance and a greater electric - only range. (topspeed.com)