The thermal efficiency benefits of low-pressure loop (LPL) EGR on spark-ignition engine combustion are well known. One of the greatest barriers facing adoption of LPL-EGR, on high power-density applications, is the challenge of boosting. Variable nozzle turbines (VNT) have recently been developed for gasoline applications operating at high exhaust gas temperatures (EGT). The use of a single VNT as a boost device was preferred to two-stage boosting system or a 48 V electronic boost device for this study. A predictive model was created based on engine testing results from a 1.6 L turbocharged GDI engine . The model was tuned so that it predicted burn-rates and end-gas knock over an engine operating map with varying speed, load, EGR rate and fuel type. Using the model, an assessment of VNT performance was performed using compressor and turbine maps made available from a hardware supplier.Results show that the single VNT device is able to support LPL-EGR across the operating map while maintaining realistic engine full-load performance, while maintaining or improving upon thermal efficiency compared to a twin-scroll turbo charger. This work was done in close collaboration with U.S. Environmental Protection Agency engineers as part of their continuing assessment of advanced light-duty automotive technologies to support setting appropriate national greenhouse gas standards.