Like I said, out of some 20+ cars that's what I've noticed. Still, usually the larger the engine the lower the idle. Also the numbers I quoted were for cars with manual transmissions. Automatics generally idle 100-150 higher than their manual counterparts. Again from personal experience and reading service manuals. Really as long as it isn't idling at some ridiculously high rpm that'll harm the engine you're ok. I personally find the idle of a carbureted big block intoxicating.
2001 Miata LS 5-speed
