The 2018 Kia Niro is a compact wagon that its maker wants you to view as a crossover utility. It comes only as a hybrid or a plug-in hybrid that’s new this year, though we expect an all-electric version to arrive for 2019 or 2020. Trim levels differ between the two powertrains: the higher-volume Niro Hybrid is offered in base FE, mid-level...
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