Toyota Prius Prime adds plug-in efficiency to hybrid drivetrain (pictures)

Toyota launched a generational update to its Prius hybrid model recently, and follows that car up with the 2017 Toyota Prius Prime at the New York auto show.

Prime is the new name Toyota is giving the plug-in hybrid version of the Prius.

The Prime combines the Prius' hybrid drivetrain with a larger battery pack that can be recharged from the grid.

The hybrid drivetrain and plug-in capability give the Prius Prime fuel efficiency of 120 mpg equivalent, in Toyota's initial estimation.

Like the Prius, the Prius Prime gets a 1.8-liter four-cylinder engine, burning gasoline to drive the front wheels.

The hybrid system adds an electric drive motor to the engine. Electricity is recaptured through braking and deceleration, and reused to drive the car.

LED headlights contribute to the Prius Prime's efficiency, and will likely last for the life of the car.

Unlike the standard Prius, the Prius Prime gets a large 8-kilowatt-hour lithium ion battery pack.

On a f ull charge, the Prius Prime can go 22 miles under electricity alone.

As with the Prius, the Prius Prime's styling reflect very specific aerodynamic needs.

The new Prius exhibits much better handling and driving dynamics over its predecessor, but the Prius Prime will have to contend with a heavier battery pack.

Braking regeneration, recharging the battery, greatly reduces wear and tear on the friction brakes.

Toyota gives the Prius Prime this floating roof look with a blacked-out rear pillar.

Instead of separate fuel filler and plug-in ports, Toyota combines those under one hatch.

The Prius Prime plugs into a standard J1772 electric car charger.

The Prius Prime retains its practicality with plenty of cargo space.

The dashboard has a future-forward style.

This 11-inch portrait style touchscreen will be an option in the Prius Prime.