Krede: thanks for explanation, but...
1) idiot behind the steering wheel could kill mother with children also in car with 25kW. There are cars with good suspension/brakes as BMW, Mercedes, Murena (really no difference if 170 or 190PS), etc. and there are old cars with very bad properties as Skoda 120, all American cars (and often with 300+ PS), VW Beetle, etc. which are dangerous with their engine and after 20% increase, they are undriveable.
2) what if I will make documentation with small jets in carburetors and after aproovement I will change them + camshaft + exhaust, who and how will control my real power each ride?
3) look at all those accidents, it's so easy to speak about speed - we can simply controll it and say what is under/above the limit, but easy in this case = wrong. Much bigger problem is that there is a lot of people who aren't able to drive (unable to see everything at one moment, unable to make the right reaction for every situation, atc.) or aren't paying full attention to driving, I'm not speaking about alcohol...
The system of lowering the speed in GB is the worst way. They say 50km/h in town is too much, they will squeeze it to 30km/h and we will have less of accidents. After some time they will decide that 20km/h is more safe... and at least the safest is to stop driving at all
I can see it also here. First it was 60km/h, now 50km/h and when they mounted lot of automatic radar controls, 80% of drivers is driving cca 40km/h (for sure) and is it safer? No! Because when You look into these cars, drivers are eating, drinking, reading newspapers, doing make-up, etc. - because driving doesn't require their attention.
Much better way is to educate good drivers, but I understand that it is too complicated, much easier is to measure the speed
and set the limit for power increase - what after all I wrote - seems that is not a solution for safety.