In message , The Natural
Philosopher writes
I m not convinced that slow acceleration is as effective as its made
out to be.

Under heavy acceleration the engine management system will go open loop
and injects more fuel than is strictly necessary for very good reasons,
the excess fuel is burned in the cat and wasted so slow acceleration
will use less fuel even if the eventual speed is the same.


the energy needed to get a car up to speed is the same.
Of course, but unfortunately real life internal combustion engines don't
run best with theoretical energy inputs so even though the amount of
energy required is the same you'll find that a heavy foot will still use
more fuel.


--
Clint Sharp