The electrification of productive activities cannot be considered the only strategy for a low-carbon economy, and sectors such as road freight and passenger transport will have to continue using technologies based on combustion in the medium and long term. It is expected that sustainable synthetic fuels and CO2 capture and storage technologies (CCS) can help to reduce greenhouse emissions. However, the occupation of spaces and the energy penalty of the capture are handicapped in smaller facilities, such as conventional combustion engine vehicles, and determine its technical and economic viability. In this paper, AVL boost and Aspen + softwares simulations are performed to analyze the feasibility of using an Organic Rankine Cycle (ORC) to supply the power consumption of an on-board CCS system coupled to an internal combustion engine (ICE) operating at partial engine loads and over the whole rpm range. Two spark-ignition engines of different sizes, fueled with CH4, have been modelled, and temperature swing adsorption is selected as a viable method for the CCS system, assuming a carbon capture rate of 90 %. Results show that the ORC reduces between 3.9 and 13.9 % the penalization of the CCS system over the engine power, keeping it under 8.84 % in the small engine and 5.71 % in the large engine. It can be concluded that an ORC-CCS hybridized system is energy feasible for the operation of an ICE working at partial loads in the entire rpm.