Straight eight and 7 cylinder engines?

[wwgkd]

dont V6 have the worst inherant vibration because of the firing order necessary ?

is not the V10 the most balanced design possible ?

or have i been told wrong . . . . . . . ?

Did you mean V10 or V12? V10s are pretty bad, where V12's are balanced because they areessentially two I6s, which are inherently balanced.