Diesel vs Petrol

missile

sebdangerfield wrote: »

No, you're getting the law of reciprocal motion (third law of motion) confused with his lesser works of thermodynamics regarding the conservation of energy. Third law of thermodynamics and to a lesser extent the first and second too but well googled non the less.

Do you race or just track? Is it a TL? Forgive me, I'm less up to date with my bikes.

Perhaps you could explain why you think "thermodynamics says they aint"? I studied thermodynamics, but it was a while back and maybe I missed that lesson.

FYI The third law of thermodynamics was not developed by Newton

sebdangerfield

Perhaps you could explain why you think "thermodynamics says they aint"? I studied thermodynamics, but it was a while back and maybe I missed that lesson.

I think you must have a missed a few if you think out of all the wonderful rules of Newtonian physics his laws of motion relate more to this argument that the laws of conservation of energy.


Or maybe you read the first google result for 'third law'?

FYI The third law of thermodynamics was not developed by Newton

I didn't say it was, and niether was Kepler's law perfected by Kepler. But you'd know that having studied it.

missile

It was you who missquoted, "newton's third law of thermodynamics" in this ....... hmmm ........ debate.

I didn't say it was,

Yes, you did in #227

You know best, well better than Audi when it comes to service intervals.

sebdangerfield

missile wrote: »

It was you who missquoted, "newton's third law of thermodynamics" in this ....... hmmm ........ debate.

Yes, you did in #227

You know best, well better than Audi when it comes to service intervals.

I didn't say it was developed by Newton. Hence all the writing bit here

I didn't say it was, and niether was Kepler's law perfected by Kepler. But you'd know that having studied it.

But again, you'd know many laws of physics, like the ones mentioned aren't named after the people who 'developed' (sic) them.

missile

sebdangerfield wrote: »

I didn't say it was developed by Newton. Hence all the writing bit here



But again, you'd know many laws of physics, like the ones mentioned aren't named after the people who 'developed' (sic) them.

As far as I am aware the third law of thermodynaics was not developed until the 20th century, long after Sir Isaac Newton died in 1727. Can you please point me to any web or text book which supports your claim that he contributed in any way to the third law of thermodynamics?

More importantly can you explain in what way this law proves your claims re performance of diesel engines.

What does Kepler have to do with this? Maybe you getting your inspiration from the stars?

missile

I note that you have edited your post #227 to delete the reference to Newton and changed the reference from the third to the second law of thermodynamics. No worries, none of us are perfect.

I would be very interested to hear you explain how this (or indeed any law of motion / thermodynamics) proves a diesel engine is inherently less powerful than petrol.

sebdangerfield

Once again, well googled.

I submit.

You have a performance car. The A3 and the TT tdi 170s are both awsome perfomence cars and can do 50mpg. Even though the 0-100 comes up in a paltry 19.5 secs they're still perfomance cars as the squillions of torques tear a hole in the fabric of space time and using the second law of thermodynamics produce energy that wasn't there in the first place to mind bendingly propel the vehicles faster than their rubbish peformance figures would suggest.

The future's here everybody....... and it's smokey!

My heart is warmed by the many people on here who conceede they bought their diesels as they're cheap to fuel. My mind laughs at the ones on here who're obviously fans of speed but are too proud to admit they can't afford to run a real car that actually lives up to the speed to which they aspire.

missile

I did not need to google.
I am sorry that we seem unable to debate this in a grown up manner.

Garetha

Come on now children - put your toys away and behave!:eek:
This space is for grown-ups to discuss things properly.

ahillsy

In my (humble) opinion, it really doesn't matter - the only person who is guaranteed to be right on this subject is the person making their own decision on the car they decide to buy.

I chose my current car (Ibiza FR TDi 130bhp) 5 years ago mainly for economy reasons as I was doing high-ish mileage. I also wanted something with a bit of poke so went for a warm hatch - less power than the equivalent petrol, but much cheaper to insure, tax and way better MPG. This was the correct choice for me, at that time.

I'm now trading it in for an Octavia vRS (2.0T petrol 200bhp) as I now do far less mileage and now have 10 years NCB under my belt to allow me to consider a car like this. This is the correct choice for me now. It doesn't mean I think the petrol is "better" than the diesel. I would happily have had the diesel had it not been for the DPF (in fact, it would have been the one I went for).

My point is there are pros and cons for both. The only person who actually knows which is the best in the diesel v petrol debate is you. And in a nonsensical way that kind of makes everyone right. I think....though to be honest, I feel a bit like a fart in a trance having read through the last few pages so I'm not sure I even understand what I'm writing myself:rotfl: