Prime 2017 max speed?

IIRC, that is about right, driven at least in part by MG1's rpm limit. Similar for my RAV4 Prime. To go faster, the ICE must be fired up, or at least spun up.

Non-Primes, at least of older generations, had lower ICE-off speed limit thresholds, above which the ICE must spin to protect MG1 from overspeed.

 

The 2017 Prime has a lower top speed than the normal 2017. This is due to the lower gear ratio that the prime has.

 

It is fast enough for me. I once took a trip from Seattle to Denver going South thru Oregon and Idaho. The speed limit was usually 80 on the freeways. Set the cruise control to 90 and just cruised. I typically set my CC to ten over the speed limit. It has been quite a few years since I have received a ticket.
Ray

 

I do the same, but in km/h, 15 km/h over (almost 10 mph). No tickets either. The only exception are the photo radar. They trigger at 10 km/h over (6 mph) so gotta be careful there, especially with the mobile photo radar.

 

Only in Idaho and Utah. Both Washington and Oregon top out at 70. I think Colorado goes only to 75, but I normally drive just I-70 just once a year, and typically only through the mountains, rarely reaching the plains, so can't speak to the other Colorado Interstates. We also drive numerous lower speed non-Interstates.

At the time and place I grew up and took Driver Education, a habitual 5 mph over the speed limit would typically get one's drivers license suspended for excessive points in roughly a year. A relative is now a judge there, and receives lots of speeding ticket appeals from out-of-state drivers for 5 mph over the limit. Or at least he did before Pandemic de-policing, I haven't asked since. The geography there makes many highways hazardous, and sparse rural populations keep highway budgets low, limiting upgrades for safety at higher speeds. But lots of out-of-state drivers simply couldn't get the lead off their pedal foot and drive to local conditions, so got tickets. Thanks to low population and low staffing, a large majority of speeding once-through travelers make it through without tickets. But those of us visiting frequently must be more careful. The in-law who is the fastest driver in the extended family, gets more tickets there than everywhere else combined. It is embarrassing for him to visit the family member who is the judge, at the very same time Officer Friendly who just gave him a citation, is also visiting.