RPM question: normal RPM under diff conditions

[cloudsearch]

Hi, does anyone can give me a guideline for normal RPM (Camry I4 Gen4) under the following conditions: (I think this can give ppl a hint when in doubt) Thanks!

1. Starting in cold weather (0'C)
2. Accelerating from 0 to around 20-25mph smoothly
3. Start after stopping at stop signs
4. Steady highway drving 60-70mph

[Venom_5]

mine starts up and idles around 1000rpms (cold) .... will idle around 800rpm when its warmed up

you can accelerate from 0-25mph smoothly at about any rpm over 1K, so youre going to get all sorts of answers

you should be able to cruise along the highway around 2500 rpm

[Tuner571]

Hmm, when I start my car in the cold my RPM's jump to about 1800rpms; I hope this is normal.

[xet]

when i start cold, i usually am around 1k or so and then it drops down to 800

[JvR]

cold: 1300-1500 rpm (i don't like it...)
warm: 600-900rpm (sometimes 300 and almost stop)



(supercharged)

[Black95Cam]

Originally Posted by Tuner571

Hmm, when I start my car in the cold my RPM's jump to about 1800rpms; I hope this is normal.

mine does too.

warm goes down to about 700 rpms.

[Tuner571]

^Yea, thats exactly how mine starts when its cold, so I guess thats normal.

[cloudsearch]

So here is why I find a bit strange:
when car starts cold, the rpm is kind of high (~1500) with some proportional noise from engine under hood. But once change gear to R or D the rpm suddenly drops to ~800-1000 with smaller significantly smaller noise from engine.

Just curious: why RPM can suddenly drop that much when change to R or D? This may be a silly qn but I really do not know. THanks.