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Nissan's VC-T engine essentially alters the compression ratio by changing piston stroke distance while you drive to go from high compression ratio while cruising under light load, to a very low compression ratio during full throttle acceleration to increase knock resistance as well as turbo boost performance.
On the other hand, Hyundai has introduced a rather complex camshaft design which alters valve timing depending on how you drive. It's sort of like an advanced variable valve timing system which delays valve timing on the intake side during light loads and speeds it up for better performance during heavier loads.
So my question is - is this technology worth it, both in terms of economic feasibility and long term reliability? The CVT on the Altima is a real bummer, but could any of you picture yourselves driving one of these? It's definitely a nice car with some very cool technology. I can't wait to see what Mazda comes up with in the next generation.
On the other hand, Hyundai has introduced a rather complex camshaft design which alters valve timing depending on how you drive. It's sort of like an advanced variable valve timing system which delays valve timing on the intake side during light loads and speeds it up for better performance during heavier loads.
So my question is - is this technology worth it, both in terms of economic feasibility and long term reliability? The CVT on the Altima is a real bummer, but could any of you picture yourselves driving one of these? It's definitely a nice car with some very cool technology. I can't wait to see what Mazda comes up with in the next generation.