Date: Sun, 09 Feb 2003 19:28:26 +0000
From: Johannes H Andersen <johsnopsamsizefitterzzzz.com>
Subject: Re: Saab 93 Sports Saloon 2.2 Tid


DervMan wrote: > [...] > > > > I'm not much for diesels; my 9000 CSE 2.0 LPT will do over 40 mpg on > motorway > > driving if I don't drive like crazy. > > There's a lot more to it than just plumbing along at a constant speed on the > motorway. Diesels don't run a richer fuel mixture when cold, so there's a > saving here (note that many run the engine a little quicker, but this is to > make it smoother - they don't need to in order to run, and it's simply > effectively holding the "throttle" open rather than running a richer > mixture). > > I've returned over 50 mpg from these size of cars, but their older cousins - > the first generation Mondeo TD, for example, and our fleet's 406 and Laguna > (indirect injection engines) would also return 47 - 53 mpg on a motorway > run. That's 25% more efficient than their petrol brethern. The noise level at motorway driving is of utmost importance to me; I couldn't live with a noisy car. I sometimes drive two hours a day on motorways and any excessive noise wear me down. Luckily this old 9000 2.0 LPT has high gearing about 25 mph/1000 rpm while newer cars oddly have faster gearing of 20-22 rpm/1000 rpm, this can be quite frustrating since you often hear a drone at 70 mph. > > Anyway, the first I would look for in a > > diesel is differences in noise and vibration since this is the main > bugbear > > and where I expect the technology is advancing. > > It's advancing across the whole spectrum, though. Petrols are also advancing. Wonder what happened to the Saab SVC engine? Was there a noise/vibration problem? Johannes http://sizefitter.com

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