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The new VAg diesels are common rail - the PD engine is more efficient and produces more grunt but isn't as refined as a common rail.
As for black smoke - my 1 series kicks a little out when you hammer it but the Audi I drove was clean as a whistle...
Nissan Almera 1.5, solo about town about 30, motorway work about 45 combined about 37. Towing the caravan about 32 whick isnt too bad as I am towing about 950kg with a lot more kit in the car about 45kg plus a passenger
Just for the curiosity value, I once measured the mpg of my Ducati 750ss on a track day at Cadwell, and was astonished to find that over 90miles covered on the track it was still doing 36mpg. Admittedly, the engine was blueprinted, with polished ports, optimised squish, forged pistons etc, and just run in, but still, I was impressed with that.
You need to make it lighter.... ;)
2001 Renault Laguna 1.9 diesel. On the A1 this morning I was getting 62mpg. Usual consumption over a few thousand miles is about 51mpg (including about 25% town driving) . Not bad for a car that's done 115k miles!
Having only just changed cars from a petrol Seat Ibiza Cupra to a Skoda Fabia vRS SE the difference in MPG is a lot. Used to average between 25-30 for travelling to work - now it's 45-50. And driving back from North Wales on Friday I averaged over 60MPG. Yes I know diesel is more expensive but with the cheaper car tax, don't know why I didn't do it earlier.
You seriously got 60mpg out of a Fabia Vrs? My other half has moved on to an Octy Vrs but even I could never get more than 55mpg out his old Fabia VRs.
My Fiesta ST still beats the Octy on MPG though. :D
Pardon my lack of knowledge Kneeslider, but what is 'optimised squish'?Quote:
Originally Posted by Kneeslider
Cheers.Gobber
That's no problem from a vRS. :) I've got the same engine in my Ibiza FR and I've seen some very good figures from it, especially on long motorway journeys. Even on the local roads round here, I can go about in 6th gear and get a good MPG from it. All down to driving style I guess. I've learned how to drive it economically when I want to, but of course the power's still there to give it a bit of stick if need be. :DQuote:
Originally Posted by GridGirl
Squish clearance is the technical term for the minimum clearance you can get away with between the piston and the cylinder head. Obviously you don't want the piston to come into contact with the cylinder head or valves, but at the same time, if you have a big clearance, then the compression ratio will suffer. The clearance between the valves and the piston can be adjusted by dialing in the cams.Quote:
Originally Posted by Gobber
You can measure the squish by using plastiguages attached to the piston, then you turn the engine over and measure the thickness of the plastiguage. Then if it is too big, you can either skim the head or fit a thinner base gasket.