In terms of 0-60 mph, 1/4 mile time, and top speed. Me personally, regardless of vehicle type or age, sub-4 seconds 0-60 mph, sub-12 second quarter mile time, and a top speed over 180 mph are when I consider a street car to be “fast.” If it doesnt have all three then it’s some form of quick.

*I do adjust the numbers depending on downforce.