الموضوع: يا تري حدي يقولنا ما العلاقه بين قوة الماتور ووزن السياره

ببساطه شديده .. لو موتور جامد و عربيه تقيله .. هاتجري .. لو موتور جامد و عربيه خفيفه .. هاتجري اكتر ...
بس ...(لازم يكون فيه عقده ..)
السرعه مش بس موتور ... كل الات الجر مرتبطه بالسرعه ... موتور .. فتيس .. كرونا .. مقاس الكاوتش .. دي حاجه . كمان برضه ظبط الموتر و الانجكشن و الكلام ده ..و كمان نظام الموتور و حجمه و وزن العربيه و وزن الموتور .
تاني عامل .. قاعده العجلات و العفشه و العلو و الارتفاع .. و توزيع وزن العربيه .. و كل ما الموتوريكون ورا العربيه ثباتها يزيد ..
كمان حاجه .. الايرودينامكس ..
كمان .. كمان كمان ...(ماكانوش عملو هندسه سيارات ;) )

The real measure in car performance is not CC or horsepower, it's actually something called power-to-weight ratio

و ده ببساطة القوة بالحصان مقسومة على الوزن بالطن

Lets say that Verna is 100 HP and 1,000 KG, then its PTW ratio will be 100 HP/TON

Then lets say that the Golf 5 is 120 HP but its weight is 1,400 KG, then its PTW will be 120/1.4 = 86 HP/TON approximately

In such example the Verna will outperform the Golf 5 in acceleration although the Golf has more power

But as the speed increases other factors wil start affecting the performance, most importantly air resistance (aerodynamics) as mentioned by Abu Abdullah

At higher speeds a car with good aerodynamics will direct the air to the path that will minimize the friction forces. Engine power is divided between power actually going to the wheels and power used to counter the air resistance, so the less power lost on air resistance, the more power going to the wheels.

As for stability at higher speeds, this depends on something called down force

و ده ببساطة هل الهواء اللى جاى فى وش العربية هيزقها لفوق ولا هيدوس عليها لتحت

If a car has a poor body design and no spoilers, there will be no real downforce

و ده اللى يخلى عربية يتقال عليها "زى الريشة" بعد ال 100 أو ال 120 أو أى سرعة

On the other hand a car with a good design will create more down forces on itself, which will make it more stable at higher speeds.

Sorry for not writing in Arabic...

بكتب براحة أوى :D

so
weight affects acceleration
aerodynamics affects top speed
tyres , suspension and aerodynamics affects stability and grip