On 11/03/18 08:34, Andy Bennet wrote:
On 10/03/2018 21:29, wrote:
On Saturday, 10 March 2018 18:41:58 UTC, Dave Plowman (News)Â* wrote:
In article ,
Â*Â* David wrote:

The motor manufacturers will have to produce a new range of economical
petrol engines targeted at the big load luggers which do so much of the
utility work before diesels can be phased out.

Petrol engines are at their worst efficiency wise when doing stop start
journeys.

all engines are

Electric engines arn't

Electric engines are, actually.




At cruise, nothing like the same difference between petrol and
diesel. And diesel can become less efficient when thrashed.

all engines do

Electric engines don't

Electric engines generally do as well.

Ther are few motors that have the same efficiency across the power
band. You select the most efficiency where you expect to be operating
most of the time.



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