The focus of this paper is the design and implementation of a series-parallel multiple-regime plug-in hybrid electric vehicle (PHEV) using a 2013 Chevrolet Malibu as a platform. The University of Victoria EcoCAR team used a 3-year vehicle development process (VDP) modeled after those used by Tier 1 automotive manufacturers, and maintained by the rules of EcoCAR 2: Plugging into the Future.Intensive research was conducted to determine the ideal architecture selection based on overall greenhouse gas (GHG) emissions, criteria air contaminant (CAC) emissions, fuel economy, petroleum use, and vehicle performance. As a result, a series-parallel design was pursued, using a high power rear traction motor and large BAS electric machine tied to an E85 compatible 4-cylinder internal combustion engine (ICE). This architecture platform provides for multiple regimes of operation including electric only operation provided by the 14.8 kWh lithium ion battery. The architecture is very flexible in operability, allowing for use of the vehicle beyond direct competition goals to further UVic research activities on hybrid controls.Vehicle control strategy development has relied heavily on hardware-in-loop (HIL) simulation. This allows for rapid development of control strategy concepts. Mechanical integration of new components has been conducted with the primary objectives of minimizing structural impacts to the existing vehicle, and maintaining consumer appeal. Mechanical design will continue to move forward and be refined in the implementation phase of the competition with support from General Motors regarding structural changes.