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Originally Posted by da_ilks
I don't see the big fuss about AFM to be honest.
By my (simple) logic, cutting cylinders means cutting power for a given rev range, which means more fuel is required to keep the power going and the speed consistant, negating any benefits from running less cylinders? Isn't the point of a big V8/turbo 6 is to sit on a lazy 1500rpm at 100km/h and revel in the torque? My XR6T will happily average 9.5l/100km's at 110km/h with aircon on, and it's been much the same with even my old 5L Commodore V8's.
As mentioned above, 4cylinder cars are normally no better then family sedans at highway speeds, it's inner city/heavy traffic a small car dominates with economy.
Am I off with my thinking here? Is this just a marketing tool, not a real world one?
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Was doing some more thinking about this.
As we all know, 4 cylinder cars will never match a big engine car for torque. If you combine a 6sp auto's gearing (low to keep revs low on the highway) with an engine which will be working harder to produce the same power/torque for the same rev range, and put that in a big, heavy 2tonne family sedan, I still don't see the benefits of cutting the cylinders on the highway?