Friday, Nov 09, 2012 at 00:51
Ok lets look at some real figures.
The current model hilux, from Toyota published figures.
The 2.7 litre motor produces 116KW and 240Nm
the 3 liter turbo common rail diesel produces 126KW and 343Nm
Firstly not a fair comparison of technology because the diesel is turbocharged and the petrol is not, The diesel will also cost you more to buy and mantain....but any way.....the cutting edge diesel that is a bigger motor is producing 42Kw per litre where the petrol motor is producing 43Kw per litre.
In motorsport we apply a capacity penalty to turbocharged motors so a fairer comparison would be with the 4 litre V6...it produces 175KW and 376Nm.....again 44KW per litre
so diesel does not produce more power for given engine capacity, even with the latest technology
The common rail turbo diesel may produce better economy figures...but the fisrt dose of bad fuel and thats all gone out the window.
Besides the fuel economy figures are not with the vehicle fully loaded.
going back to the 03 model.
The 2.7 litre petrol not yet variable valve timimg produces 108KW and 235Nm
the 3 litre normall aspirated diesel produces 71kw and 200Nm
the 3 litre turbo produces 85 kw and 315Nm
Unless diesel is turbo charged its not even close to the power a petrol engine is capable of.
sorry I could not find any independent fuel economy figures.....but without turbocharging and common rail technolgy diesel is simply not all that flash
the other thing is on road drivability...the petrol motor will always have far more power bandwidth...it will be pulling strongly at 2000rpm and will comfortably pull all the way to 5500 that means less gear changes and better acceleration.
as for talking about diesels in trucks...that is totally irrelivent appart to say.......um how much power does the 12 pluss liter motor produce per litre
Oh and that big diesel...whats the power band...where is ya redline 2500, 3000 or perhaps a screaming 3500 and how many gear shifts do you have to make.
In big heavy vehicles diesel is a necessity braught on simply by scale and almost all trucks are turbocharged.
But in small passenger derived vehicle the advantages are not all they are cracked up to be.
cheers
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