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A back-to-back comparison of the 2013 Hyundai Azera and long-wheelbase Santa Fe spec sheets reveals what appears to be essentially the same 3.3 liter V6 used in both applications, producing nearly identical horsepower and torque figures. Though the engine sharing is obvious (and standard practice in the automotive industry), Hyundai made a number of internal alterations to ensure the direct-injected mill was ready for duty when it got transplanted from the 3,605 lb, four-door Azera to the 3,946 lb Santa Fe midsize crossover.
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Not only does the 2013 Santa Fe weigh considerably more than its sedan stablemate (despite 333 lbs of weight loss compared to its predecessor, the Veracruz), the CUV requires more engine durability for greater passenger payloads, cargo requirements, and towing demands.
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How did Hyundai modify the mill for its new duties? First off, they applied a chromium electro deposition on sliding parts like tappets and rig chamfers, for friction reduction and improved heat management capabilities. Hyundai's Mike O'Brien told Popular Mechanics, "We could have chosen a more expensive coating like titanium nitrate, but it wouldn't offer the same levels of heat management."?
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The Santa Fe's powerplant also gains a three-stage induction system, which maximizes torque and drivability for greater fuel efficiency, and a variable displacement oil pump which avoids the parasitic loss of energy associated with pumps that run in excess of their needed capacity. Finally, the mill incorporates a number of weight saving measures like a fiber reinforced resin surge tank, engine cover, and water pump, all of which help it claim the title of being the only midsize CUV that tips the scales under two tons-- constituting relatively minor changes all around, but nonetheless resulting in tweaks which reveal how a spec sheet sometimes only tells half the story about two otherwise similar engines.
Source: http://www.popularmechanics.com/cars/news/auto-blog/engine-sharing-hyundai-style?src=rss
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