Recent availability of high-voltage power semiconductors has allowed implementation of a unique, highly efficient, Hybrid-Electric powertrain, the Hyperdrive. It uses an innovative method of control for the internal combustion engine (ICE). Comparative analysis of an application of the Hyperdrive to a popular American SUV is presented, including performance, fuel economy, emissions and costs. In summary, the Hyperdrive, which provides near-thermodynamic-limit fuel efficiency over a wide range of vehicle sizes covering almost all the automotive market, has the potential to succeed conventional powertrains. Vehicle design freedom is considerably enhanced, performance is improved and safety is not compromised. Substantial socio-economic effects are presented.