I wonder if Khan could actually manage to crush Deckard's absurdly durable skull if he got into a position to do so. The guy got German suplex'd by a guy with super strength, landing head and neck first onto the crumpled up hood of a car, and it didn't even slow him down. He literally got right back up and took a fighter's stance, absolutely no worse for wear. Fast&Furious characters are like A-Team members.
More like a "superhumans getting involved in convoluted spy/terrorist plots and occasionally remembering to drive cars in absurd ways" franchise. For example, in Furious 7, Hobbs used his body as a human shield to tank an explosion, fell several stories, flattening a car on impact, and all he got was like 2 broken bones, which he recovered from in the space of a few days. Dom does things like lift and hold the entire front half of a car for several minutes (like a human jack) without any serious strain. And Shaw is in the same class as those two.