Brakes are heat generators, that's all they do. Kinetic energy is converted to heat.
Drilling brakes (or casting them with holes) reduces the capability of the disc to absorb heat, so they get hotter, faster.
Hotter brakes are more efficient at dissipating heat. That's not always a good thing. For road driving it's a very bad thing.
The issue is with achieving the optimal operating range for the pad material.
Pick your pads to match your driving requirement. Your discs don't matter very much. What matters is using pads that will brake effectively over the temperature range you expect the car to experience. Same for tires.
Carbon ceramics brakes on any road car are just a fashion statement. Like very large wheels, almost all spoilers and often those very expensive tires.
So the Alfa is nearly all fashion! Typical Italians! Must have been designed by Dolce and Gabbana or Versace.
I beg to differ on the rear spoilers on the giulia and tires comment. Wheels comment, depends on what you are doing really. 19" is slightly excessive but not overly. Adds a lot more weight. 18" is a better setup. If I can ever find a good looking 18" wheel for this car, I'd move to those. These 19" are heavy. 18" is the norm in DTM these days. in 1993, the 155 V6Ti DTM car used both 19 and 18" wheels. I know this is not a daily driver but it gives some idea that 19" wheels are not necessarily USELESS or Fashion statements especially with proper sized tires. I dumped the 225 tires that wrapped the wheels from the factory and went with a larger tire, larger sidewalls. I prefer this over the stretched tire.
"The vast majority of spoilers out there don't do anything – you don't get any bang for your money," says Dr. Martin Agelin-Chaab, assistant professor in automotive engineering at the University of Ontario Institute of Technology (UOIT) in Oshawa, Ont. "They only work if they're properly installed, and even then, they only work at speeds of at least 100 km/h or more."
Spoilers are supposed to spoil aerodynamic lift: the force that wants to pull your car off the ground. They're supposed to push your car onto the road.
"Usually, spoilers are intended to increase downforce – they deflect air upward, which creates a downward force on the car," says Dr. Ron Miller, an engineering professor at Carleton University who has worked on race-car design. "This helps stick the tires to the road to give the car better grip and therefore better handling in cornering."
Spoilers can also reduce drag, Agelin-Chaab says. And the less air resistance your car has, the less gas you'll have to burn. But you probably won't notice the difference driving the kids to soccer, unless you're taking the highway.
"At 120 km/h or more, 50 per cent of fuel goes to combat drag," he says. "So, at high speeds, reducing the drag even slightly can have a huge impact on fuel economy."
But a spoiler only works if it's cutting through the air at the correct angle, Agelin-Chaab adds.
"Factory-installed spoilers on higher-end sports cars are very effective. Many others out there probably aren't so effective – and some car manufacturers even say their spoilers are for looks only." I'd argue these are higher end vehicles especially the Q and the design of the rear deck spoiler
Properly installing a spoiler requires at least three hours in a wind tunnel (UOIT's costs $700 an hour), Agelin-Chaab says. If you're installing one yourself, you can measure the drag on your vehicle doing a coastdown test.
While a spoiler might not help your car's handling or fuel economy, it can't hurt, right? Sorry to be a spoilsport, but a badly installed spoiler could mess with the airflow around your car. "Since it was not part of the aerodynamic design of the car, a spoiler may or may not interact correctly with the flow around the vehicle to improve things," Miller says. "It can even make things worse."
A badly installed spoiler can give the rear wheels too much grip, causing understeer.
"It can make the car more reluctant to turn as the straight rear wheels tend to overrule the turned, less gripping, front ones," he says.