I am also a university student who has to read a lot, usually dry engineering textbooks. There are some tricks you can use to read faster. First of all I think practicing helps. I try to read a little everyday, usually fiction books that I enjoy.
Second, a lot of people on the autism spectrum have issues with auditory processing. I dont know about you, but I can process visual things much faster. So, when you are reading, don't say the words out loud in your head. You can try listening to music while you read, preferably music without words in it.
Third, you dont have to focus on every single word individually. It's like when you look at a car, you instantly recognize it as a car without looking at the wheels, chassis, and windows separately. Just look at the sentences rather than the words. Also remember that in order to pass a test, you dont need to know 100% of the information.