2,500 rpm in a family sedan generally isn’t a whole lot to get excited about. In fact, it’s traditionally closer to idle speed than anything offering the possibility of real entertainment. But each and every one of those 2,500 revolutions in this 2013 Nissan Altima offers a frisson of excitement when whirling away in concert. Why? Because they add up to 100 mph. In a four cylinder.
Process that for a minute: 2,500 revs = 100 mph in a 2.5-liter normally aspirated four-door kinshlepper. This, friends, is impressive. We first verified the figure for ourselves during a prototype drive at Nissan’s Arizona proving grounds back in March. More real-world numbers include 2,000 rpm at 80 mph and just 1,450 rpm at 60 mph. Credit the Altima’s Continuously Variable Transmission, which has been extensively reworked for this new model. Seventy percent of the transmission’s parts are new, and internal friction has been reduced by up to 40 percent through a battery of small tricks including redesigned internals swimming in lower viscosity oil. The transmission has a super-wide 7.0 gear ratio spread and reprogrammed control logic to help the keep all four pots on boil as necessary.
Full story: Autoblog
