A 2.0-liter internal-combustion engine pairs with two electric motors in the Prius Prime. Buyers who want a plug-in Prius can expect to add at least $5,025 to a base non-Prime’s starting sticker ...

spilling details on the model previously known as the “Prius Prime.” The new naming structure also applies to the RAV4, with the old RAV4 Prime henceforth renamed the RAV4 Plug-in Hybrid.