Energy efficiency drives the ICE development for more than a century, while ever-increasing ecology awareness in the last decades and requests for the reduction of toxic and CO2 emissions, lead to complex and demanding driving cycles and put severe challenges in the optimization of critical operation regimes to secure ICE application. The Spark Ignition Direct Injection Engine (SIDIE) featuring high boost and high compression ratio, Variable Valve Timing (VVT), complex injection strategies and combustion systems (HCCI/SACI), seems to be an effective response to high demands. Cold start/warm-up, regardless of combustion system applied, is a critical part of emission certification procedure in all standard driving cycles. Catalyst efficiency depends on temperature and engine capability to produce the exhaust gas heat flux necessary for its warm-up. A specific test procedure was designed and performed on Spark Ignition Single Cylinder Research Engine (SI-SCRE) to investigate and evaluate the influence of DI strategy set-up on the capability to provide fast catalyst warm-up during low-temperature/low-load operation. Double injection strategies in terms off Start of Injection (SOI), Split Factor (SF) and Rail Pressure (RP) were tested and analysed against combustion dynamics and combustion stability parameters obtained from in-cylinder pressure indication and complex thermodynamic post-processing..