The main difference is the way the fuel gets ignited. In a gasoline engine, there is a spark plug connected to coils driven by the points and the distributor, that electrically generate a spark at...
has no ignition system 100% catracho Chido I wouldn't say a diesel motor has no ignition systeam. Diesel motors have glow plugs which I would consider to be part of the secondary ignition systeam....
A diesel engine is heavier than a petrol engine because some parts in a diesel engine are made from cast iron such as cylinder sleeves etc. The weight difference is usually between 10-20kgs.