If i understood it correctly, there is a problem fitting D-4(direct injection) on the same engine as Valvematic(variable valve lift), because of limited space on the top. Please correct me if i'm wrong The question then is, which is better? BMW seem to have dropped their Valvetronic system in favor of direct injection, Toyota seem to do the oposite. Also, will it be posible in a near future to see both systems on the same engine?