Volvo xc90 AWD 28.7 mpg

[tjts1]

Originally Posted by instarx

I like these Porsche-designed Volvo inline 5s - good economy, lightweight (all aluminum), plenty of power and practically indestructable. I'm sorry to see them being replaced on the 70 and 90 series Volvos, but at least they're still being used on the 40, 50 and 60 models.

Sorry bud. The whiteblock is NOT designed by Porsche. Porsche was only involved in the final design and tuning of the 2 stage intake and exhaust manifolds on the original 1992 NA 850 GLT, 1 year before it ever came to the US. All that stuff was dropped after the 1994 model year. Porsche had nothing to do with the turbo whiteblock, especially the phase 2 motors after 1998.


Using the same driving techniques I've seen 39mpg in our 1996 5 speed NA 850 wagon. At 75mph cruise it does 32mph on 87 octane.

[instarx]

Well Bud, it looks like you're right. But I still like the engine. Where ya been? I wrote that 7 months ago.

[greenhairedchese]

I have the '03 XC90 and it has the 2.9L I-6 twin-turbo. It gets great hwy mileage and terrible city mileage. 32 and 15 or less, respectively. I figure the hwy is that good because I kept the speed at the RPM that the turbos are finally spooled up; around 2100RPM. That way they're adding boost but not at full-power. I notice that when I drive like that and I have the cruise activated and I encounter small inclines, the RPM doesn't change, it just increases the boost from the turbos. It's crazy to hear them spool back down once you crest the hill and the whole time the tach needle never moves. This only applies to small hills though. I wish my 98 V70 had a turbo, I really enjoy having that boost of power to trim the edge off.