> Hello!
> I Am searching historical infoes on VAXstation 4000/60
> 
> Anyone knows in which year it started to be sold by DIGITAL ?

1991.

> I heard the CPU is the Rigel CPU, is it true ??

No, it's the Mariah series.

> IS It a RISC CPU ??

No, actually VAX is perhaps the best example of a
CISC architecture.

> How are the performance of such CPU with what machines it can be compared ?

Well, the best comparisons I've found are at:
http://www.compaq.com/alphaserver/performance/perf_tps.html
and:
http://195.148.172.4/~aw/vax/vax-perf.html