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SAE Congress: Magna Flex4 offers slight fuel savings in a Land Rover LR2 [w/video]

Flex4 may sound like something sold during the 3 a.m. hour on advertorial television, but it's really Magna's part-time all-wheel drive system that offers the benefits of AWD with lower emissions than standard AWD. How? Because Flex4 can disengage the power going to the rear wheels when it determines that it isn't needed, changing the vehicle to a more-efficient two-wheel-drive ride. The AWD is also engaged every time the vehicle stops and, most of the time, when the vehicle goes above 30 miles