And it still doesn't make much sense.
You got a 2014 Lamborghini completely decked out, but it has solid rubber tires.
And you got a 89 Honda Civic, and has top of the line Michelins.
Yet the Civic outperforms the Lamborghini somehow.
First, when it comes to video game performance, the graphics card is a significant factor in that performance. Think of it more like a turbo or supercharger for the CPU, giving it significantly more power to handle the task at hand. Hardly just a set of tires on the car.
Second, a Lamborghini with solid rubber tires would be absolute shit. That being said, so is an 89 Honda Civic, regardless what tires it's running.