The trend towards powertrain electrification is expected to grow significantly in the next future also for super-cars. The aim of this paper is therefore to assess, through numerical simulation, the impact on both fuel economy and performance of different 48 Volts mild hybrid architectures for a supercar featuring a Turbocharged Direct Injection Spark Ignition (T-DISI) engine. In particular the hybrid functionalities of both P1 (Belt Alternator Starter - BAS) and P2 (Flywheel Alternator Starter - FAS) architectures were investigated and optimized for this kind of application through a global optimization algorithm. The analysis pointed out CO2 emission reductions of about 7% on NEDC, 5% on WLTC and 4% in real world driving conditions. From the performance perspective a 6% reduction in the time-to-torque was highlighted for a load step maneuver at 2000 RPM constant speed.