As one Subaru Crosstrek owner recently learned the hard way, it bears repeating that all-wheel drive is not the same as four-wheel drive. A Subie owner posted a warning letter they received a month after driving on Colorado River Overlook Road in Canyonlands National Park to the r/NationalPark subreddit. The letter notes that this particular road is restricted to 4WD vehicles only, and the Crosstrek is equipped with AWD, not 4WD. It also warns that they may face serious consequences if they’re caught taking an AWD car on a 4WD-only trail again.
I didn’t know the difference so I looked it up: https://www.spinny.com/blog/index.php/awd-vs-4wd-the-difference-explained/
AWD has the ability to drive all four wheels, but not necessarily all of them at the same time. 4WD has the ability to drive all four at the same time.
The main difference is the additional physical gearing for 4 high and 4 low gears, both of which have different gearing than “regular” drive.
I have an older Audi with a Torsen Quattro AWD system, and an ancient Toyota 4Runner with 4WD. The 4Runner can be switched into either 4 wheel high or 4 wheel low gears to deal with different conditions. The Audi always has the same gearing, it cannot be switched.
It’s like the gears on a bicycle - 4 low is the one where you barely move while standing on the pedals - maximum torque per revolution.
You can go rock crawling in a 4Runner in 4 low. You really should not go rock crawling in an Audi or Subaru without 4 low, no matter how much ground clearance the vehicle has.
The National Park Service has this rule because it doesn’t want to spent time and taxpayer money rescuing people who think AWD is the same as 4WD with a low range gearbox.
Subaru has x-mode for difficult terrain, which is different gearing. They also have hill descent. https://www.sportsubaru.com/subaru-x-mode.htm
Why would you want 4wd with wasted energy when you could have symmetrical awd and get all the power to wheels that have traction, skipping those that don’t have traction?
I only see awd outperform 4wd when it comes to a subie, but other awd systems from other manufacturers are probably not up to snuff.
Edit: meant to say symmetrical awd instead of slip differential.
My AWD Subaru Solterra EV has better 4wd than most 4wd vehicles. Dual motor AWD for the win.
Honest question from someone who has never owned either, but who once went camping with someone with an AWD Subaru and who, in turn, managed to get us stuck as fuck. Isn’t the difference not so much the drive as it is the clearance of the vehicle? The Subaru was a glorified station wagon and just wasn’t built to go through rugged terrain, regardless of how the wheels worked.
Clearance, tires, and open diffs are the big 3.
Most awd vehicles use torque sensors to brake the wheel that has no traction to push power to wheels that do. It doesn’t always work and most awd systems are clutch based so there’s slippage.
More of the basic 4wd vehicles these days come with electric lockers, more power, and better clearance. They still have road tires though so there’s room for improvement there.
I will say, most people that don’t do this stuff on a semi decent basis have ZERO idea on how to actually wheel. You can get pretty far in a base model but even the cheapest new bronco or wrangler are better equipped to deal with actual wheeling than a Subaru.
Driving Sports TV on YouTube shows how most of the vehicles work in light off-roading, and spoiler, most are terrible.
Tires are well and truly goofy. Black magic engineering. The things you could do in an astrovan with the right tires VS a wrangler with the wrong tires just doesn’t seem right.
Tires are just incredibly use specific, Usain Bolt would do terribly in a sprint with bowling shoes, and would hurt himself bowling in running shoes. It doesn’t matter what you drive if you’ve got the wrong shoes for the drive.
A truly skilled driver/rider might be able to pick a good line, but most of that skill will show when they go “nah. Ain’t doing it”.
Signed - an ADV rider who’s tires are and will forever be a compromise between dirt and tarmac performance.
It only needs to lock left and right as the front and rear are separate drivetrains. They (electric AWD vehicles) usually provide locking of a wheel with no traction by using the brakes on that corner
Soltera is a shit car, but I absolutely agree that dual or quad motor awd is better than 4wd. All other things being equal I’d even argue that basic awd with electronically locking diff is better than 4wd in most cases.
I think this rule should be changed to high penalties for pulling out stuck cars. Period. Take whatever you want, but if your Civic gets stuck, make the cost of pulling it out 50% of car’s value.
I agree, most of the problem is people putting rental civics where they shouldnt be. A subie with a lift is enough to get u through mosy of national park 4w only roads. It’s usually driver error that gets u stuck. Garuntee most people they pull out never had any kind of gear to get themselves out.
That said, it Def helps to roll with some one who does have 4w incase u get a little head strong.
Unfortunately I did drive it. Easily one of the worst Subarus ever made. Pretty much every review and user rating online confirms this.
If you have 4 wheels, logically 4WD is AWD. Why not just say you need to have a locking diff?
Subaru has x-mode for difficult terrain, which is different gearing. They also have hill descent. https://www.sportsubaru.com/subaru-x-mode.htm
Why would you want 4wd with wasted energy then you could have a symmetrival awd and get all the power to wheels that have traction, skipping those that don’t have traction?
I only see awd outperform 4wd when it comes to a subie, but other awd systems from other manufacturers are probably not up to snuff.
That’s splitting hairs, tbh. Especially in the case of a Subaru. Though I guess it scares off anyone with a shitty AWD system from going on the trails.
Imagine a Cybertruck there. It’s “4WD”.
And as a longtime owner of both 4WD and AWD vehicles, it’s not splitting hairs
Just because you don’t know the difference doesn’t make it splitting hairs.
I know the difference. Subaru has, arguably the best AWD system on the market. That’s what I mean. It’s obviously dumb AF to say, take an AWD Equinox or some shit up a trail, but Subaru is a lot more capable than GM’s AWD system.
And neither AWD system has a low range gearbox like a 4WD system, which is the point of the NPS rule.
I think there are a lot of factors here. We would actually need to be on the trail to point out where a 4x4 would be required and why. I take my awd suv off road all the time in places where it gets a bit hairy and I haven’t had a problem. However, I know when to stop and say “that’s a bit too uneven for me.” I think that understanding is the main difference for the people who get stuck.
“But officer, I pushed the X-Mode button!”
