Advantages v disadvantages of a diesel!!!

But then the economy would go down the pan.

You can't seriously be claiming that a fuel with a lower calorific content will produce more power for a given volume / mass, can you?

Because that's what you seem to be claiming, and it's, quite frankly, bollocks.

Reply to
SteveH
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Scientific analysis, physics, stores departments say differently...

Sorry but the reputation for long lasting diesels came from busses and trucks. and big boats etc. These make so little power and dont have false long service intervals and are so big they seem to last forever.

Reply to
Burgerman

Erm, that's not the comparison, though.

If I put my VFR engine in a car, it would be utter s**te to drive as you'd need about 8k rpm on the dial before it started making any sort of progress.

Then you have the engine life to consider - bike engines are very fickle things and need lots of maintenance compared with a car engine.

You're obviously getting totally tied up with this one, so I'd give up now before you make yourself look even more blinkered and stupid than you already have.

Reply to
SteveH

Will it do so on the basis of pure performance, though, or bang-for-buck and fuel economy?

Reply to
Douglas Hall

Erm, no it comes from my local minicab company who have Octavia diesels, still on original turbos and engines, racking up close on 300k miles now.

Reply to
SteveH

Well, you're talking about a diesel being able to lap with 4% of the laptimes of the petrols, whilst lasting an extra 10 laps on the same volume of fuel.

Sounds like a very good compromise for endurance racing.

Reply to
SteveH

And the laps aren't exactly short are they....

Reply to
DanTXD

Yes it is. Its a non turbo petrol engine.

So what, it redlines safely at what 11,000? Effectively its the same as a car engine at 3000 Lots of people fit bike engines in cars because they go BETTER! although not a 750...

They need only oil changes and valve clearances checked every 6,000 to

10,000 no worse than a diesel!!!

I should, because you have no idea. You ask me why diesels wear faster and I told you very clearly. You didnt like it, or didnt understand it so called it bollox. You are the idiot.

Err other way round.

Reply to
Burgerman

Why so?

For some marques, they have equivalents on both sides of the petrol / diesel that are blown (eg Volvo, VAG, Vauxhall).

Depends on the criteria of your use of "equivalent". In what way is comparing engines of similar capacity and induction not equivalent, if they are available in a line up?

Not true for at least 2, probably more marques. Volvo and VAG have both lpt and hpt engines in their line-ups that are of similar, if not the same, displacement as the turbo diesel engines in their line ups. How are they not equivalent for the purposes of comparison?

Why so?

Isn't the way to compare _engines_ based on the capacity and induction?

Otherwise you could use countless other metrics, peak power, peak torque, best mpg...

At least two major marques use both lpt and hpt in their petrol line-ups.

At least two major marques use both lpt and hpt in their petrol line-ups.

Reply to
Douglas Hall

Isn't it odd that you hardly ever see petrol cars with that sort of mileage as they are seemingly so much better.

Reply to
Depresion

Which proves absolutely nothing. Many petrol engines have gone much longer on real exhaustive test than similar diesels. As tested in depth by Ricardo who do most of the development and testing for major car / bike engines and gearboxes including the japs.

Reply to
Burgerman

but will they be based on the awesome cross country ability of the Golf floorpan? :-p

Reply to
Pete M

Dunno, but Steve Hislop will be driving.

Reply to
DanTXD

You are again showing your ignorance. Increasinc compression to give the correcxt ratio for either propane or ethanol (brazil) IMPROVES efficiency. As does correcting advance curve and fuelling... You make this too easy!

I never claimed that. What happens is this...

5 percent more fuel, 10 percent more power. Add more compression, and efficiency rises again. Buy a book?

No your understanding is a bit shallow, you are arguing with the wrong guy. I never say ANYTHING that i cannot prove to be true.

Reply to
Burgerman

Quite possibly in terms of competition.

But like what happened in CART a few years back, when fuel economy and reducing pit stops became a factor - it becomes as dull as ditchwater to watch as a _race_.

Reply to
Douglas Hall

In 2004 they were doing 17 laps of Le Mans where as the petrol cars were doing

10-11 per tank. (Or 54.5% further than the best petrol)
Reply to
Depresion

Most people fit them because they are light, then lots of people find they can't use them on the road because of the lack of low down torque makes them unpleasant when not being raced.

Reply to
Depresion

Um, no it ain't.

Local LPG fitter to me has a Jeep Grand Cherokee that produces *more* power on LPG than petrol. Not a huge amount more - around 5 bhp, but more all the same. Mainly because he can advance the timing by around 15 deg when running on LPG.

Don't forget, LPG is around 112 octane and extremely clean burning.

Reply to
Pete M

That's the one. :)

...in Germany.

A
Reply to
Alistair J Murray

But the petrols still won.

Anyway, still waiting for a valid, non monetary reason why Dr D's evil invention is better than a petrol.

Reply to
Pete M

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