Miles or kilometres?
Miles or kilometres?
Power to weight ratio
Physics and engineering
are the tyres those newfangled Graphene ones?
Or those new-fangled rubber bands that ruin the ride and write off the rims if you drive over a piece of gravel?Originally Posted by benshep
Back to the original question, travelling at 40mph instead of 25mph for one hour means higher wind resistance, engine working harder and more fuel consumed.
If you are in the same gear then yes.
However optimum speed for fuel efficiency is usually low revs in top gear so usually around 50mph.
I drove 9 hours to Skye, and 9 hours back... half of it was fairly consistent 70-80mph motorway driving, but the other half was absolutely booting it in sport mode through the Highlands... my average mpg went up during that journey...
In today's cars, I don't think speed matters so much (my motor has 8 gears so it's generally always in a perfect gear to match the road speed)..... it's more likely the stop/start nature of modern journeys which brings the efficiency down...
55 or 56 mph used to be recognised as the optimum speed for efficiency.
It's also suggested that cruise control is a benefit on flatter roads.
be careful guys. Fudge the Elf will be on your case.
Richard Taylor
"William Tell could take an apple off your head. Taylor could take out a processed pea."
Sid Waddell
And this is the second worst thread .....ever.
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