New for 2012, the Toyota Prius Plug-in extends the Prius's ability to operate on electric power alone (EV mode) at speeds of up to 62 mph, for up to 15 miles. Like the other Prius trims, primary power for the Prius Plug-in comes from a 1.8-liter Atkinson-cycle 4-cylinder gas engine and an electric motor, which kicks in seamlessly when required during acceleration or when passing. In addition, the Plug-in receives a new 4.4-kilowatt, 176-pound lithium-ion battery pack, replacing the standard NiMH battery found in the other Prius trims. It fits under the rear cargo floor and includes a 24-foot battery charging cable, which owners can use to charge the battery in about 3 hours using a standard household outlet. When operating on electric power alone, the Plug-in achieves a miles per gallon equivalent (MPGe) of 84 MPGe, and it manages a still-impressive 49 mpg when operating in hybrid mode.
Inside, the Prius Plug-in comes equipped with such standard features as Toyota's new 6.1-inch Display Audio, which gives drivers access to a 6-speaker AM/FM audio system with a CD player, SiriusXM radio, a USB port, Bluetooth and audio streaming, as well as navigation and a backup camera. The Display Audio system also incorporates Toyota's new Entune feature, which integrates with a smart phone via an app, enabling the driver to search for restaurants and stores, shop for movie tickets and check sports scores, traffic and weather. Other standard features for the Prius Plug-in include heated front seats, automatic climate control, a Smart Key system with push-button start, a multifunction tilt/telescopic steering wheel, a 60/40-split rear seat and power windows and door locks. Cloth upholstery with manually adjustable front seats also comes standard. Exterior features include power mirrors, a rear spoiler and 15-inch alloy wheels. Standard safety equipment includes 7 airbags and Toyota's Star Safety System, which incorporates enhanced vehicle stability control, traction control and antilock brakes with brake assist and electronic brakeforce distribution. Hill Start Assist, another standard feature, aids the driver when starting from a full stop on a hill.