What is the compression ratio for diesel and petrol engines?

Question

Accepted Answer

Compression ratio for diesel is higher than petrol due to their different combustion characteristics.

Compression ratio is the ratio of the volume of the combustion chamber from its largest capacity to its smallest capacity.
Diesel engines have a higher compression ratio than petrol engines due to their different combustion characteristics.
The compression ratio for diesel engines typically ranges from 15:1 to 20:1, while for petrol engines it ranges from 8:1 to 12:1.
Higher compression ratios in diesel engines result in better fuel efficiency and more power output.
Compression ratio can also affect the octane rating of petrol, with higher compression ratios requiring higher octane ratings.

Top Diploma Trainee Interview Questions Asked at Bajaj Auto