On 10/04/2016 00:35, Dave Plowman (News) wrote:
In ,
Roger wrote:
Because you've singled out power to weight as some sort of benchmark.
And it would be easy enough to find a small capacity high revving bike
engine with the same sort of peak BHP as a lazy V8. Put them in
vehicles so the power to weight ratio is the same, and see which one
accelerates faster. It will be the one with the flatter torque curve.

It's not a practical thing to do - and you'd *have* to do it to prove
whether or not your statement is true.

Actually, quite easy to do.

I think you might have some difficulty trying to install a bile engine
in a car!

But are you then saying power to weight isn't the be all and end all of
acceleration?


I'm saying that it's the most significant factor. I would expect a
diesel car to perform similarly to a petrol car with the same power to
weight ratio - as indicated by the figures which someone quoted to other
day.

But when you start comparing apples with pears by speculating about
putting a bike engine in a car, you are shifting the goalposts more than
somewhat. Your hypothetical bike engine probably wouldn't do so well
because you wouldn't to able to deliver near maximum power - and I
stress the word *power* - to the wheels for as large a proportion of the
time.
--
Cheers,
Roger
____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.