I'd suspect Europe is the forefront of engineering if your talking exclsivley cars the luxo brands (love them or hate them) lead the tech race IMO.
Id love to see Hyundai create something like the veyron
As for ford and holden they are great cars but everyone has to have the badge value these days, forget the strain the cost of keeping up appearances puts as long as we got a flashier (base model BMW) car than shaz & Daz next door it's all swoit