Ukuhlukaniswa kwezinjini zezimoto kunezinhlobo ezilandelayo:

1. Ngokohlobo lwamandla, izinjini zezimoto zingahlukaniswa zibe izinjini zikadizili, izinjini zikaphethiloli, izinjini zezimoto zikagesi, kanye nezingxubevange.

2. Ngokuya ngezigaba zesistimu yokuthatha, ingahlukaniswa ibe izinhlobo ezine: i-aspirated ngokwemvelo, i-turbocharged, i-mechanical supercharged kanye ne-dual supercharged.

3. Ngokwemodi yokunyakaza kwepiston, ingahlukaniswa ibe injini evuthayo yangaphakathi yepiston kanye nenjini ye-rotary piston.4. Ngokohlobo lokuhleleka kwamasilinda, kukhona izinjini ezisemgqeni, izinjini zohlobo lwe-V, izinjini zohlobo lwe-W kanye nezinjini eziphikisana nendawo.

5. Ngokwenani lamasilinda, ingahlukaniswa ibe yinjini eyodwa-cylinder kanye nenjini enamasilinda amaningi. Izimoto zesimanje zisebenzisa izinjini ezingama-three cylinder, four-cylinder, six-cylinder, kanye namasilinda ayisishiyagalombili.

6. Ngokwezindlela zokupholisa ezihlukene, ingahlukaniswa ngenjini epholile ngamanzi kanye nenjini epholile emoyeni.

7. Ngokwenani lemivimbo, ingahlukaniswa ibe injini evuthayo yangaphakathi enemivimbo emine kanye nenjini evuthayo yangaphakathi enemivimbo emibili.

8. Ngokwezigaba zemodi yokuphakelwa kukaphethiloli, injini ye-carburetor, injini yomjovo we-elekthronikhi kanye nenjini yomjovo oqondile kusilinda.