Well not stock anyway.....:-) my 90 V8 won't do any more than 148mph, that's registered by the speedo....... Actually it may depend on the year.... How fast are the 4.2 liter cars ? Would 40hp really make it that much faster ? Do we have anybody on the list with a 4.2 liter V8 ? Regards, Mike L. 89 100 Avant 90 V8