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03-06-09, 04:40 PM

Just as a point of order:

56mph isn't the point at which a car/bike/bus whatever is running most efficiently, simply one of the speeds at which economy is tested, and quoted, in order to ensure that everything is compared like-for-like.

The most economical speed is that which a vehicle of any kind can maintain using the lowest rpm for any given gear without causing the engine to struggle, which is generally around about the point at which peak torque is produced.

03-06-09, 04:40 PM	#24
Dan Guest Posts: n/a	Re: Most Economical Motorway Speed? Just as a point of order: 56mph isn't the point at which a car/bike/bus whatever is running most efficiently, simply one of the speeds at which economy is tested, and quoted, in order to ensure that everything is compared like-for-like. The most economical speed is that which a vehicle of any kind can maintain using the lowest rpm for any given gear without causing the engine to struggle, which is generally around about the point at which peak torque is produced.