| http://www.w3.org/ns/prov#value | - All 2.5-liter 4-cylinder-equipped Altimas qualify for Ultra Low Emission Vehicle (ULEV) status.Both engines feature continuously variable valve timing, modular engine design, microfinished crank journals and cam lobes, molybdenum coated lightweight pistons and electronically controlled throttles.Backing either engine is a choice of 5-speed manual (not available on 2.5 SL 4-cylinder models) or 4-sp
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