Ask the Car People.SM


Infiniti G35 vs Audi A4

88 messages,  Last post on Jul 30, 2008 at 9:29 PM

You are in the Audi A4 Forum.

What is this discussion about? Infiniti G35, Audi A4, BMW 3 Series, Car Comparisons, Sedan

Messages Page 10 of 10

#82 of 88 Re: MB c-class [rjlaero] by laurasdada

Jul 04, 2008 (1:22 pm)

Replying to: rjlaero (Jul 03, 2008 12:14 pm)
Reminds me of the late '70s, early '80s. Gas prices rising and supply tenuous at times. The answer? Hot hatches! Rabbit GTIs, Mitsu/Chrysler Turbos. Turbos boosted your performance without too much sacrifice in mpg. I had an '85 Mirage Turbo, fun fun fun.
 
Yes, the last several year the HP wars have gotten stupid. Sure, more power is good, but really where (as a suburban denizen) am I going to take advantage of 300+ ponies? I'll be quite happy with a wonderfully turbo'd four or powerful enough 6 (a la my TL) in the future. Unless the 8 is as economical as a powerful 6, like the XK from what I've read (yeah, Aluminum!).

#83 of 88 Dont you think by m4d_cow

Jul 11, 2008 (10:47 am)

The turbos fuel econs a bit overhyped? I mean it exists in the Mazda CX7 (turbo 4), yet the fuel economy is equal to a V6's.
Another thing about turbos I'm still concerned of is its durability. Turbos, particularly higher pressure ones, require some cooling down time before the engine can be shut off. That is if you want the turbo to last. How many of you wait for a few mins before shutting down the engine? I doubt there are more than a few.
 
Hauschild, turbos kick in at certain rpm limit, usually starts at 3000 rpm or so. So if you keep your engine at lower rpms the turbo may not kick in, if your car's an automatic, you'll have to use the manumatic to control the shifts. Turbo's main purpose is to increase speed, while a compressor (or supercharger) is meant to push torque and hammer the acceleration at lower rpms. Of course, you cant use both at the same time on stock engine, unless you want to blow up the cylinders.

#84 of 88 Turbo by r34

Jul 11, 2008 (12:06 pm)

I heard that new turbo doesn't require several mins to be cool off, as long as you drive the car at normal speed before you shut off the engine.
 
If you have twin turbo, it helps to build up the boost.
 
You get the torque much quicker with a turbo car. It is more fun in driving it too.
 
Make sure you use premium gas.

#85 of 88 r34 by m4d_cow

Jul 13, 2008 (12:01 am)

I heard that new turbo doesn't require several mins to be cool off, as long as you drive the car at normal speed before you shut off the engine.
 
Thats because at normal, presumably lower speed the turbo doesnt work. Remember that turbos dont kick in unless the engine reach certain rpm limit.

#86 of 88 Re: r34 [m4d_cow] by r34

Jul 14, 2008 (10:37 am)

Replying to: m4d_cow (Jul 13, 2008 12:01 am)
Maybe it should be "the turbo will not be fully utilized before certain rpm".
I saw the turbo needle of my Saab moved when the car started to move. Most of the torque came out around 2000rpm. I don't need to wait till 3000 or 4000 rpm. However the lag is much more obvious than the 335i.
My co-worker who had a 300Z twin turbo told me he never noticed any turbo lag.

#87 of 88 by hauschild

Jul 30, 2008 (2:48 pm)

m4d_cow - thanks for the info about the point at which the turbo kicks in.
 
I am getting around 25 MPG city (all stop and go and roughly 30-45 speed limit for 8 miles to and from work) by not using the turbo. When I first got the car, I was getting around 21 - so I'm not sure if I can chalk that up to winter driving versus summer, or if my lighter foot is having an impact.
 
At any rate thanks.

#88 of 88 by m4d_cow

Jul 30, 2008 (9:29 pm)

np

Messages Page 10 of 10

To POST a message, please Sign In.

Advertisement

Browse by Category

Browse by Vehicle
   View All Vehicles

Browse by Board
Browse by Topic
View All Topics

Edmunds Community

Advertisement