But is displacement everything?
Say you have two friends.
The first has a V8 Commodore. He's a keen driver, but he uses it every day so it's basically stock.
The second has a supercharged V6. It's his weekend car, so he's worked the suspension, taken a lot of the sound deadening out, put an aftermarket exhaust on, worked the engine all the way through and had it tuned, and various other things. It's streetable, but it's not that pleasant on a long trip.
Is one really more impressive than the other?
The V8 is cool, and it's fine that the guy keeps it stock because that's the way he needs to use it. It's a nice car, and one that most people would be happy to own.
The supercharged V6 is going to be faster both in a straight line and through the corners through all the work that's been done to it, and a better drivers car in almost every way except user friendliness. Displacement aside, it's a better car, and anyone who has even the first idea about cars will know that.
And regarding the sound thing, I had the pleasure of hearing a supercharged SV6 at a track day I went to at Sandown. One of the most amazing sounds I've ever heard.
If you want your car to generate respect, you just need a good car. I think the assumption is that a car with a bigger engine is always better, and that's just not true at all. A guy I used to work with had an absolutely mint R34 Skyline GTR V-Spec II Nur. That's not the biggest engine in the world, but a hugely impressive car to any car nerds due to the care he took with every upgrade he did to it and the sheer rarity of the thing.
Don't get me wrong, a V8 Commodore or Falcon is a lovely car and I'd love to have one (in manual please). But you pay a price for that huge lump up the front, and serious drivers are aware of that. An SS Commodore just isn't that impressive against any real sports car, big engine or not.