I70 is a snooze fest to get to Torrey ... if you're a truck driver and need to get there to keep your quota, go for it, otherwise, back roads!
191 south from Moab to 95 and you can stop in and see the gorgeous natural bridges national monument. Say hi to the free-range cattle, and watch out as they sometimes find themselves on the roadway.
95 starts heading north-west, through the Glenn Canyon area which is also beautiful. Stop for lunch in Hanksville, cute 50s themed diner there with awesome burgers and onion rings.
Turn west onto 24 and you'll be in Torrey in no time.
I went in June, during a drought, there was NO WIND at all anywhere in Utah, completely dead... smog from a forest fire in a neighboring state had the sky all hazy. I don't recall any killer grades, there were some hills around Glenn Canyon, just downshift and enjoy the scenery.
Here's a short look into Utah 95 around Glenn Canyon:
https://www.youtube.com/watch?v=nT5Ye2oGGRwFYI there is no land-based (terrestrial) radio stations or cell-phone coverage for much of this route, and very few other travelers ... it was GREAT :)