Ricardo, as part of the Horizon 2020 European part-funded REWARD (REal World Advanced technologies foR Diesel engines) project, have continued to focus on the development of advance aftertreatment technologies through model based system simulation using vehicle simulation framework (V-SIM). This paper presents the results of the evaluation of aftertreatment systems and management strategies for a range of diesel passenger cars suitable for Real Driving Emissions (RDE) legislation and targeting emissions levels beyond Euro 6d. Owing to the wide variation in feed gas properties expected over an RDE cycle the results seen for current production system architecture such as Lean NOX traps (LNT) or actively dosed Selective Catalytic Reduction (aSCR) systems highlight the challenge to adhere emissions limitations for RDE legislation whilst fulfilling stringent CO2 targets. Optimisation of both the aftertreatment system, with regards to type and layout, and the related controls strategies, such as deNOX and exhaust gas thermal management, are shown to be required for legislation compliance. Vehicle simulation has been performed with a range of aftertreatment systems and engine-out feedgas properties, including an assessment of exhaust thermal management approaches, and the results are evaluated considering a range of criteria including; emissions control capability, estimated system on-cost, packaging limitations, fuel consumption penalty and additional fluid consumption. Aftertreatment system recommendations that are appropriate for legislative and a range of RDE cycles are made for a selection of light duty diesel applications.