For same compression ratio and heat addition, the efficiency of otto, diesel and dual cycle may compared as
1
ηdiesel cycle > ηdual cycle > ηotto cycle
2
ηdiesel cycle > ηotto cycle > ηdual cycle
3
ηotto cycle > ηdiesel cycle > ηdual cycle
4
ηotto cycle > ηdual cycle > ηdiesel cycle