I-injini inokuthi iyona nto ibalulekileyo yemoto, kwaye ukuhlelwa kwayo kunempembelelo enkulu ekusebenzeni kwemoto. Kwiimoto, i-injini yokwakheka inokwahlulwa ibe ziintlobo ezintathu: ngaphambili, phakathi nasemva. Okwangoku, iimodeli ezininzi kwiimarike zisebenzisa ii-injini zangaphambili, kwaye iinjini eziphakanyiswe phakathi kunye nezingasemva zisetyenziswa kuphela kwiimoto zemidlalo ezimbalwa zokusebenza.

I-injini yangaphambili iphambi kwe-asi yangaphambili. I-advanteji ye-injini yangaphambili kukuba yenza lula ubume bokuhanjiswa kwemoto kunye ne-axle yokuqhuba. Ngokukodwa kwiimodeli zokuqhuba amavili angaphambili okwangoku ahlala kwi-absolute mainstream, i-injini idlulisela ngokuthe ngqo amandla kumavili angaphambili, ishiya ishaft yokuqhuba ende. Ilahleko yothumelo lwamandla iyancitshiswa, kwaye ukuntsonkotha kunye nesantya sokusilela kwendlela yokuhambisa amandla nako kuncitshiswe kakhulu.

I-injini ye-Mid-mounted, oko kukuthi, i-injini ibekwe phakathi kwe-asis yangaphambili nasemva kwesithuthi, kwaye ngokubanzi i-cockpit ibekwe phambi okanye emva kwe-injini. Kunokuthiwa imoto ephakathi kwinjini kufuneka iqhube ngasemva okanye iqhube ngamavili amane.

Xa imoto ijika, zonke iindawo zemoto ziya kuphuma ekoneni ngenxa ye-inertia. I-injini yeyona nxalenye inkulu, ngoko amandla e-injini kumzimba wemoto ngenxa ye-inertia inempembelelo ebalulekileyo ekuqhubeni imoto ekoneni. Uphawu lwe-injini ye-injini ephakathi kukubeka i-injini ngeyona inertia enkulu kumbindi womzimba wesithuthi, ukuze ukuhanjiswa kobunzima bomzimba wesithuthi kusondele kwibhalansi efanelekileyo. Ngokubanzi, kuphela ezo moto zemidlalo zibalaseleyo okanye iimoto zemidlalo ezithathela ingqalelo ukuqhuba ulonwabo zisebenzisa ii-injini eziphakathi.

Ngokuqinisekileyo, injini ephakanyiswe phakathi nayo ineentsilelo zayo. Ngenxa ye-injini ephakathi, i-cabin imxinwa kwaye ayikwazi ukulungiswa kunye nezihlalo ezininzi. Ukongeza, ngenxa yokuba abaqhubi kunye nabakhweli basondele kakhulu kwi-injini, ingxolo iphezulu. Nangona kunjalo, abantu abalandela kuphela ukusebenza kwemoto abasayi kukhathalela ezi zinto, kwaye abanye abantu bakhetha ukuva ukuduma kwenjini.
Ngokubanzi, eyona njini isulungekileyo inyuswe ngasemva kukubeka i-injini emva kwe-asi yangasemva. Elona limele kakhulu yibhasi, kwaye zimbalwa iimoto zabakhweli ezinenjini ebekwe ngasemva. Oyena ummeli yiPorsche 911, kwaye ngokuqinisekileyo i-smart Ikwayinjini yangasemva.