Power for all Prius trims comes from a 1.8-liter four-cylinder engine and a pair of electric motors/generators. Their combined 121 horsepower is sent through a continuously variable automatic transmission (CVT) to the front wheels.

The Prius One and Two are similarly equipped, with the One missing a few minor features, such as a rear window wiper. Otherwise, standard feature highlights for both include 15-inch wheels, automatic LED headlights, LED running lights and taillights, heated mirrors, keyless entry (driver door only) and ignition, automatic climate control, dual 4.2-inch driver information screens, adaptive cruise control, a tilt-and-telescoping steering wheel, cloth upholstery, a height-adjustable driver seat, and a 60/40-split folding rear seat.

Also standard is a 6.1-inch touchscreen display, a rearview camera, Bluetooth phone and audio connectivity, voice recognition with Siri Eyes Free, and a six-speaker audio system with a USB port, an auxiliary audio jack and a CD player. Standard safety features include automatic high beams, a rearview camera, forward collision warning, forward collision mitigation with automatic braking, and lane departure warning and intervention.

The Prius Two also currently comes with the Safety Plus package as a no-cost add-on, which includes blind-spot monitoring, rear cross-traffic alert, parking sensors and automated parking assist.

The more efficient Prius Two Eco is equipped with ultra-low-rolling resistance tires, a lighter lithium-ion hybrid battery, an inflation kit instead of a spare tire, and illuminated keyless entry. The rear wiper that comes standard on the Two trims is not offered, nor is the Safety Plus package. It returns an impressive 56 mpg combined (58 city/53 highway).

Inside the Prius Three, you'll find simulated leather on the steering wheel and armrests, white interior accents, a wireless phone charging pad, and the Toyota Entune premium infotainment system with a 7-inch touchscreen, navigation, satellite radio, HD radio, and access to apps such as Pandora, iHeartRadio, OpenTable and Yelp when paired with a smartphone running the Entune app.

The Prius Four comes with automatic wipers, simulated leather upholstery with contrasting white stitching, heated front seats, a power driver seat with adjustable lumbar, seatback storage pockets and a rear cargo cover.

Standard equipment on the Three Touring or Four Touring includes everything from the corresponding Three or Four, plus 17-inch alloy wheels, foglights, LED clearance lights, unique rear bumper styling, and imitation-leather upholstery with contrasting blue stitching.

Note that the aforementioned Safety Plus package is also a no-cost add-on for the Three and Four. The Prius Three and Four (but not the Touring versions) can also be upgraded with the Advanced Technology package, which consists of a sunroof and a head-up display. Finally, the Prius Four and Four Touring can be equipped with the Premium Convenience package, which includes a 10-speaker JBL audio system, a self-parking system and Safety Connect emergency services. The Safety Connect system that can be added to Prius Four and Four Touring is subscription-based (with a one-year free trial) and includes automatic collision notification, stolen vehicle locator, and one-touch access to roadside and emergency assistance.