In future Euro norms, the soot volume fraction and the soot number density will be regulated. Car manufacturersneed therefore accurate soot models for piston engine emissions prediction in order to developfuture engine concepts. This paper addresses this question by coupling a sectional soot model with a tabulatedcombustion model for RANS simulations of Diesel engines. The sectional soot model, based on thework of Netzell et al. (2007), is implemented in the IFP-C3D RANS CFD code. At each time and location,transport equations are solved for several soot sections, including source terms for collisional and chemicalprocesses. The soot model is coupled to a tabulated combustion model derived from the EngineApproximated Diffusion Flame one (EADF) (Michel and Colin, 2013). It allows to represent the minor speciesrequired by the soot model with a much lower computational cost than a kinetic solver. In order toevaluate the soot model coupled to the resulting combustion model called Variable PressureHomogeneous Tabulated Chemistry (VPTHC), it is compared to the same soot model directly coupledto a complex chemistry solver. As this comparison can hardly be performed on a real Diesel engine casedue to the very high CPU time involved by the chemical solver, it is performed on a variable volume andfuel/air ratio case which retains the essential features of a Diesel engine. Results show that the proposedcoupling recovers with reasonable accuracy the evolution of the soot volume fraction and distribution.Finally, an experimental database of Diesel operating points is simulated. The database includes pointswith a commercial Diesel fuel and the computed surrogate (30% 1-Methylnaphthalene and 70% Decanein liquid volume) to validate the models against the experiments. Soot yields predictions from the modelshow an improvement against the current standards and reach industrial target of accuracy for most ofthe database while the model also provides a good estimation of the soot particles distributions in size.