Because of higher compression ratio.
diesel is more expensive
diesel is usually more expensive but diesel cars usually have more mpg than petrol cars
It will depend upon the conditions. Under normal operating conditions a diesel engine is more efficient than a petrol engine.
for same power diesel engine produces more torque @ less rpm whereas petrol engine produces less torque @more rpm this difference is due to different combustion processes of diesel and petrol
Diesel engines are more efficient. They get better mileage, produce more torque, and last much longer than a gasoline engine. They are also more expensive to build.
Diesel engines are more efficient and do use less fuel, but they do not cost less than a petrol engine, they cost more. Diesel fuel also costs more. A diesel engine will however last longer.
No, diesel engines cost more to build than petrol engines. They are built much heavier.
A petrol engine revs higher, which allows it to burn more fuel and output more power.
Yes
cost of refining the crude oil ofcourse... In the UK diesel is more expensive than normal unleaded petrol.
The diesel is more efficient but more expensive to build.
The diesel battery is bigger as it take a lot more to get a diesel engine going. Best bet is to charge the diesel battery using the petrol, connect the 2 and leave the petrol engine running.