Could be going down hill. In 1985, had a brand new Toyota Celica. I think top end was about 105ish. Engine rpm was high, had no pull at all.
Now, definitely one of the dumest things I did, on the way to Las Vegas, very long and straight roads, some are down hill, 6% grade or higher.
Got that Celica up at just above 125mph, think RPM's were in lower 4k or so, That car still had some pull left in it. I pussed out, and decided that 125mph or higher on such small and narrow tires, just was a really bad idea. Just took foot of accelerator and very lightly applied brake until I got back to a reasonable speed.