False Advertisement

I was watching one of the episodes of Top Gear, where they had an E-Type and a DB5, and it gave me an idea. What if you could do false advertisement on your cars. Say your engine is pulling 285 hp, but you sell it as a 300hp car, then not many people will notice and your sales will go up, but if you try to sell it as a 400hp car, everyone will notice and your reputation will go down. I just think there should be a shady way of playing the game.
Also, as the time progresses, the percentage by which you can fool customers will lower. For example, in the 60's you can get away with a 30% advertisement, but in the 90's you can only do 15% advertisement before getting caught.
Also, as the time progresses, the percentage by which you can fool customers will lower. For example, in the 60's you can get away with a 30% advertisement, but in the 90's you can only do 15% advertisement before getting caught.