@ramrod I think you're overly fixated on horsepower. It's not that important in brake sizing. It's much more important how much the car weighs and how it's being driven.
240s are not particularly light cars, if you want to thrash them, you will find the limits of the stock brakes. I have a lightened 245 which, on stock brakes, with 195 tread tyres, I can hit the limits of those pads and rotors in under 5 minutes going full send down old pac. On a sports pad like EBC greens, I can still get it to fade, and from there you have to start running pads that are pure track pads that make regular driving more difficult. If you uprate the calipers and discs you effectively make the problem go away forever.
And that's not to mention that it's quite difficult to fly into a corner, shift, and heel-toe, whilst putting half your body weight onto the brake pedal because you're stressing the brake system.