1. Uma injini ye-diesel isemoyeni, akuyona ingxube evuthayo engena ku-cylinder, kodwa umoya. Izinjini zikadizili zisebenzisa amaphampu kaphethiloli anengcindezi ephezulu ukujova udizili kumasilinda ngokusebenzisa izijojo zikaphethiloli; kuyilapho izinjini zikaphethiloli zisebenzisa ama-carburetor ukuxuba uphethiloli nomoya zibe izingxube ezivuthayo, ezimuncwa kumasilinda ngamaphiston ngesikhathi sokudla.
2. Izinjini zikadizili ziyizinjini zokushisa ezicindezelayo futhi zingezezinjini zokushisa zangaphakathi ezicindezelayo; izinjini zikaphethiloli zibaswa yizinhlansi zikagesi futhi zingezasezinjini ezivuthayo zangaphakathi.
3. Isilinganiso sokucindezelwa kwezinjini zikadizili sikhulu, kuyilapho isilinganiso sokucindezela sezinjini zikaphethiloli sincane.
4. Ngenxa yezilinganiso ezihlukene zokuminyanisa, ama-crankshaft enjini ye-diesel kanye nama-casings kufanele amelane nokucindezela okukhulu kakhulu kokuqhuma kunezingxenye ezifanayo zezinjini zikaphethiloli. Lesi futhi isizathu esenza ukuthi izinjini zikadizili zibe zikhulu futhi zibe mkhulu.
5. Isikhathi sokwakheka kwengxube yenjini kadizili sifushane kunesikhathi sokwakheka kwengxube yenjini kaphethiloli.
6. Ukwakheka kwegumbi elivuthayo lenjini yedizili nenjini kaphethiloli kuhlukile.
7. Izinjini zikadizili zinzima kakhulu ukuziqala kunezinjini zikaphethroli. Izinjini zikadizili zinezindlela ezahlukene zokuqalisa ezifana nenjini encane kaphethiloli iqala, isiqalo samandla aphezulu, ukuqala komoya, njll.; izinjini zikaphethiloli ngokuvamile ziqala ngesiqalisi.
8. Izinjini zikadizili zifakwe izinto zokushisa kuqala; izinjini zikaphethiloli musa.
9. Ijubane lenjini kadizili liphansi, kanti elenjini kaphethiloli liphezulu.
10. Ngaphansi kwamandla afanayo, injini kadizili inomthamo omkhulu kanti injini kaphethiloli inomthamo omncane.
11. Uhlelo lokunikezwa kwamafutha luhlukile. Izinjini zikadizili ziyizinhlelo zokuphakela uphethiloli ezinengcindezi ephezulu, kanti izinjini zikaphethiloli ziyizinhlelo zokuphakela uphethiloli we-carburetor kanye nezinhlelo zokuhlinzeka ngophethiloli womjovo we-elekthronikhi.
12. Inhloso ihlukile. Izimoto ezincane kanye nemishini encane ephathekayo (amasethi amajeneretha amancane, abagunda utshani, izifutho, njll.) ikakhulukazi izinjini zikaphethiloli; izimoto ezithwala kanzima, izimoto ezikhethekile, imishini yokwakha, amasethi amajeneretha, njll. ikakhulukazi izinjini zikadizili.