I'll bite.
The reason that small car owners (not just imports) work their cars is simple but it takes a few steps to explain it.
1. Looks. We love our small cars, we don't have to drive around with this big lump of metal. Plus we can fit into spaces where your big lump can only dream of getting into.
2. Handling. Your big muscle car is very cumbersome due to it's heavy weight, making it very difficult to take corners with great speed. With light weight cars, we can go around corners faster and brake later making the driving experience more fulfilling.
3. Power to weight ratios: Take your muscle car with 500-600hp. The problem with it is that it weighs well over 1600kg from it's big block, big body, and heavy cast iron parts. Take 1/2 of that weight but put around the same power into a Ford Escort or Isuzu/Holden Gemini from a turbocharged 2.0L motor, your 600hp V8 muscle car gets left in the dust! Or get an S13 Silvia, with the SR20 capable of more than that.
4. Price per hp: It costs BIG amounts of money to get a muscle car to go fast compared to a smaller motor and even BIGGER amounts to rebuild that motor if you blow it up. Sure, it's got a big motor, but the hp/capacity ratio is inferior to the smaller motors. You don't see 100hp/litre motors in the 6.0L and up category, usually the muscle car guys are stuck with crate motors that struggle to get 1hp/cubic inch. Compare that to B18C Honda motors that are 1.8L but produce 200hp with room for improvement to 300hp naturally aspirated, and then turbocharged to produce bigger numbers.
5. Engine Swaps: People who own small cars KNOW that the normal stock motors are usually crap, for example the Datsun 1600 (510) with it's asthmatic L16 motor. But it's cheap to get an engine like an SR20DET which bolts in without too many troubles, and give that car a 300% power boost!! Compare that to rebuilding the L16 which would cost twice as much but produce 1/3 the amount of power that the engine swap would produce....that's another reason.
6. Rotaries: Compare your 7.5L V8 motor against 1.3L of 13B motor or 2.0L of 20B triple rotor. These rotors are producing inexcess of 800hp in 13B form and well over 1000hp in 20B form. Then match that to a kerb weight of around 900-1000kg. That amount of power and weight is better than a Hayabusa and there are plenty of street driven rotors that are performing 8's on the 1/4 mile.
7. Availability: In countries like Australia, we don't get many classic American muscle cars, but we have our own muscle cars like the Falcon, Monaro, Kingswood and so on so we make do with them, but smaller cars are available in greater numbers to the backyard tuner and show car builder alike.
And finally, the biggest reason of them all:
Because we love them!! Slick and small is the way to haul, and more and more people are realising this.
I'll leave it at that for now, but for more proof at how good small cars can be, there's plenty of runs in
this post (click here!!) which show how quick small cars can be. 👍