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The Prius Prime has standard Active Headrests, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the Active Headrests system moves the headrests forward to prevent neck and spine injuries. The Ioniq Plug-In Hybrid doesn’t offer a whiplash protection system.
Over 200 people are killed each year when backed over by motor vehicles. The Prius Prime Limited has standard Parking Support Brake that uses rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The Ioniq Plug-In Hybrid doesn’t offer backup collision prevention brakes.
Both the Prius Prime and the Ioniq Plug-In Hybrid have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, front wheel drive, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, rearview cameras, driver alert monitors, available blind spot warning systems, rear parking sensors and rear cross-path warning.
For its top level performance in IIHS driver-side small overlap frontal, moderate overlap frontal, side impact, rear impact and roof-crush tests, its standard front crash prevention system, its “Acceptable” rating in the new passenger-side small overlap crash test, and its headlight’s “Acceptable” rating, the Insurance Institute for Highway Safety grants the Prius Prime the rating of “Top Pick” for 2019, a rating granted to only 138 vehicles tested by the IIHS. The Ioniq Plug-In Hybrid has not been fully tested, yet.
There are over 49 percent more Toyota dealers than there are Hyundai dealers, which makes it easier should you ever need service under the Prius Prime’s warranty.
The Ioniq Plug-In Hybrid’s redline is at 6750 RPM, which causes more engine wear, and a greater chance of a catastrophic engine failure. The Prius Prime has a 4000-RPM redline.
A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the Prius Prime’s reliability 23 points higher than the Ioniq Plug-In Hybrid.
J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Toyota vehicles are more reliable than Hyundai vehicles. J.D. Power ranks Toyota second in reliability, above the industry average. With 16 more problems per 100 vehicles, Hyundai is ranked 8th.
From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Toyota vehicles are more reliable than Hyundai vehicles. Consumer Reports ranks Toyota third in reliability. Hyundai is ranked 6th.
On the EPA test cycle the Prius Prime running on electricity gets better fuel mileage than the Ioniq Plug-In Hybrid running on electricity (145 city/121 hwy vs. 123 city/114 hwy MPGe).
On the EPA test cycle the Prius Prime running its gasoline engine gets better fuel mileage than the Ioniq Plug-In Hybrid running its gasoline engine (55 city/53 hwy vs. 53 city/52 hwy).
The Prius Prime has a standard continuously variable transmission (CVT). With no “steps” between gears, it can keep the engine at the most efficient speed for fuel economy, or keep it at its peak horsepower indefinitely for maximum acceleration. The Ioniq Plug-In Hybrid doesn’t offer a CVT.
For better maneuverability, the Prius Prime’s turning circle is 1.4 feet tighter than the Ioniq Plug-In Hybrid’s (33.4 feet vs. 34.8 feet).
The Prius Prime has .3 inches more front headroom and 1 inch more front legroom than the Ioniq Plug-In Hybrid.
A low lift-over trunk design makes loading and unloading the Prius Prime easier. The Prius Prime’s trunk lift-over height is 26.5 inches, while the Ioniq Plug-In Hybrid’s liftover is 28.8 inches.
The Prius Prime Limited has a standard heads-up display that projects speed and navigation instruction readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The Ioniq Plug-In Hybrid doesn’t offer a heads-up display.
The Prius Prime’s front and rear power windows all open or close fully with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside the car. The Ioniq Plug-In Hybrid’s standard passenger windows don’t open or close automatically. With the Ioniq Plug-In Hybrid’s optional power windows, only the front windows open or close automatically.
If the windows are left open on the Prius Prime the driver can close them all at the outside door handle. On a hot day the driver can lower the windows at the outside door handle or from a distance using the keyless remote. (Your Toyota service department must activate this window function.) The driver of the Ioniq Plug-In Hybrid can only operate the windows from inside the vehicle, with the ignition on.
The Prius Prime Limited’s standard wipers adjust their speed and turn on and off automatically according to the amount of rainfall on the windshield. The Ioniq Plug-In Hybrid’s manually variable intermittent wipers have to be constantly adjusted.
On extremely cold winter days, the Prius Prime Limited’s standard heated steering wheel provides comfort, allowing the driver to steer safely and comfortably before the car heater warms up. The Ioniq Plug-In Hybrid doesn’t offer a heated steering wheel.
To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Toyota Prius Prime XLE/Limited has a standard wireless phone charging system (Qi) in the center console. The Ioniq Plug-In Hybrid doesn’t offer wireless personal charging.
The Prius Prime Limited’s Intelligent Parking Assist can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The Ioniq Plug-In Hybrid doesn’t offer an automated parking system.
Consumer Reports® chose the Toyota Prius Prime as its “Top Pick,” the highest scoring vehicle in its category, based on reliability, safety and performance.
The Toyota Prius outsold the Hyundai Ioniq by almost four to one during 2019.
© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.
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