Perhaps it might be better to say "
STOCK = XXX MPH " and then "
MODIFIED = 140 MPH " as well as "
STOCK = XX MPG " and "
MODIFIED = 70 MPG avg. "
Even
an average Honda Accord ( V6 ) will do 163 MPH.*
Most cars on the road can easily break 130 +, so 140 may not seem so impressive
unless the person realizes that the add ons on your car have added 'x' MPH and 'X' MPG to the car.
* Source : ( beware the pop up )
2008 / 2009 Honda Accord LX 2.4L 5M - CarzUnlimited.com