1 9 ▁ ▁Ley land ▁Mot ors ▁introduced ▁their ▁O HC ▁straight - e ight ▁power ed ▁Ley land ▁E ight ▁lux ury ▁car ▁at ▁the ▁International ▁Motor ▁Ex hib ition ▁at ▁Olymp ia , ▁London ▁in ▁ 1 9 2 0 . ▁The ▁D ues enberg ▁brothers ▁introduced ▁their ▁first ▁production ▁straight - e ight ▁in ▁ 1 9 2 1 . ▁ ▁Stra ight - e ight ▁engines ▁were ▁used ▁in ▁expensive ▁lux ury ▁and ▁performance ▁vehicles ▁until ▁after ▁World ▁War ▁II . ▁Bug att is ▁and ▁D ues enberg s ▁commonly ▁used ▁double ▁overhead ▁cam ▁straight - e ight ▁engines . ▁Other ▁notable ▁straight - e ight - power ed ▁autom ob iles ▁were ▁built ▁by ▁Da im ler , ▁Mer cedes - B enz , ▁Is otta ▁F ras ch ini , ▁Al fa ▁Rome o , ▁St utz , ▁Ste ar ns - K night ▁and ▁Pack ard . ▁One ▁market ing ▁feature ▁of ▁these ▁engines ▁was ▁their ▁impress ive ▁length ▁— ▁some ▁of ▁the ▁D ues enberg ▁engines ▁were ▁over ▁ ▁long , ▁resulting ▁in ▁the ▁long ▁h ood s ▁( bon net s ) ▁found ▁on ▁these ▁autom ob iles . ▁ ▁Prem ium ▁autom ob iles ▁in ▁the ▁United ▁States ▁In ▁the ▁United ▁States ▁in ▁the ▁ 1 9 2 0 s , ▁autom obile ▁manufact ur ers , ▁including ▁Ch and ler , ▁Mar mon , ▁Gard ner , ▁and ▁A ub urn , ▁began ▁using ▁straight - e ight ▁engines ▁in ▁cars ▁target