It's not even near realistic/believable, V's system is more realistic overall.
Please explain how its more realistic?
IV's problem was that the physics were exaggerated. Sports cars handled like 1960s Sedans when they in fact are more likely to handle like V's cars. Mid-tier cars could not accelerate to a certain point. Things like that that I think are more big picture than the small picture from V's mechanics.
V's cars had more realistic responsiveness depending on the car. A sports car will feel more responsive than a sedan. My car is fairly old. It's an early 90s sedan. My dad's car (well, the one he uses the most now) is a lot newer, it's a mid 2000s sports truck. Even with it being a lot larger than my car, the responsiveness is a lot more apparent: my car takes more effort to turn than does his. I can only imagine how more responsive a top-of-the-line modern-day sports car is compared to mine. V represents this albeit pretty exaggerated.
V also has a little bit more realistic speed physics: low/mid-tier cars can reach top speeds over time, while in IV, they couldn't. Not only that, the turns at high speeds in IV were completely unrealistic. Sure, your car's gonna flip the f*ck over if you're going 160 mph and steer the wheel immediately, but as someone who spends most of his driving time at 65 mph+, I can tell you that cars aren't gonna flip over just by slightly tilting at higher speeds. Hell, I've driven at ~120mph (I was a naughty boy), and the steering was fine as long as I kept the steering steady and didn't make any sudden movements. In IV, at the slightest tilt at high speeds, your car would flip sh*t.
As far as offroad vs sportscars, I agree there for the most part, but I will say that generally, with offroad cars, I can climb mountains at a slow pace compared to having to hold the pedal to the floor with sports cars. Also, you can't really use this as a one-up on IV since there wasn't much countryside to test this out in it.
And a lot of your bulletpoints are opinions.
This comment is so wrong and so stupid I don't know where to start...
How about your wanna-be gangster ass doing 120 on a public road and trying to brag about it like that shows what a good driver you are? No, it shows that you're an awful person who doesn't care about others' safety.
I'm so sick of selfish assholes like you swerving between families in minivans and sh*t on the highway thinking you're a goddamn professional driver when you've never had any training or even touched a track.
LOL, this eric guy is proof that any monkey-brained halfwit can get a license in this country. Our licensing requirements are the most lenient, our tests are a joke, and a standard license will let you drive anything from a Lamborghini to a 10,000 lb box truck or motorhome. Most people never push their car even close to it's limits and have no idea how it would react at them. That's why nobody can avoid crashes, they just accept it as an inevitability once they start to break traction.
But back on topic, that's why simply having a license, or even driving for X amount of years does not qualify you to talk about vehicle physics. Unfortunately, the vast majority of people do not realize this and that's why they're just fine with V's physics.
Honestly, the biggest issues I have with it are lack of body roll and the awful damage system. One of my favorite things to do in IV was just get into the most spectacular crashes possible. I don't understand how they could go from that to something in some ways even worse than III's damage system.
That and jumps were so much more fun because cars actually had suspensions that would audibly and visibly bottom out upon landing. Now it's like taking an RC car off a jump. In fact, the whole experience is like driving an RC car because they have no weight or momentum.
The roads in Horizon are designed for high speeds, with very few tight corners. They also don't have many changes in elevation. I'm very glad they kept the change of grip in relation to elevation from IV. It makes the country roads much more challenging. That could be part of your problem; you aren't slowing down enough at the crest of a hill. When V came out, the problem was that cars handled on rails and wouldn't lose grip no matter what. Since the update, it's become possible to get oversteer/understeer similar to IV. And that's just reality; if you're blasting through curves at 50+, you're gonna get oversteer. Horizon plays down oversteer because it's supposed to be accessible and somewhat arcadey. If you want to maintain grip, do what race drivers do, slow down before the corner and then power through.