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Pollution laws have forced car manufacturers to work on engine management and fuel injection which, as well as giving more power from a given displacement, give lower emissions than older carburetted engines. In general terms, if an engine emits less pollution, it's using less fuel. Improvements in engine management, especially break-throughs in onboard computing power and hardware, as well as leaps forward in forced induction technology, have further improved fuel economy, to the extent that a sub-1.5 litre forced induction engine of today puts out as much power and torque as a medium-sized six cylinder engine of only a few years ago.

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Q: Many cars today are designed to get better gas mileage than those made in the past This change result from a need to?
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