Actually I was driving a friends Lexus LS 400 in the late 90’s & I was complaining that the person in front of me was going so slow. Then I looked down to see exactly how slow the person was going & I was doing 110, and it felt like I was doing 70 max. I exclaimed, oh lord I had no idea I was going that fast. My friend just laughed. Needless to say I slowed down & the vehicle in front of me pulled away still going lickety-split.
I had a 1999 Lexus SC 400. I had just dropped off my buddy where he picked up his Porsche 911. He pulled up next to me on the highway and we both punched it. I looked down again and I was up to 110 mph. I immediately backed off because of what the ticket would have cost me, not because the car felt unsafe/uncomfortable.
FYI, the 1998-2000 Lexus SC400 had a 4 liter V8 engine with 24 valves generating 290 HP. The last 3 years they made this model, they finally got it right. Prior to these three years they had 3 valves/cylinder and did not generate as much horsepower. These cars can be bought pretty inexpensive now with low mileage(under 15K on EBAY motors).