Construction is a public good. Loud cars are a private matter which provide a small benefit to vanishingly few and harm a larger number of people. And loud cars are not only driven in dense urban areas, in fact their owners often prefer to drive them on open roads, in the countryside, etc.

Loud vehicles are a nuisance to society, and an unnecessary one.

Loud cars are incredibly rare and do not cause serious harm. Focusing on them ignores most of the noise and makes it clear that you're disagreeing with their behavior rather than the noise itself. And that behavior is already discouraged or illegal.

Loud cars are rare globally but concentrated locally in certain areas such as London's Edgware Road or New York's Sixth Avenue/meatpacking district.

I'll ignore the ad hom, it's already addressed by my previous comment.

The point is that you're against the behavior but you're calling to regulate the object. They're separate things.

People can start up lawn mowers and chainsaws to annoy you too, but we don't ban them either. Instead there are rules around when it's acceptable to use them so you don't do yard work at midnight.

Popular areas of London and NYC are loud, yes. Don't live in loud areas if you want a quiet place. No different than living next to an airport or freeway.