200mph? Maybe - a modded Duramax can easily make the horsepower necessary. 69mpg? Unlikely, even using the grossly inflated European mileage tests and Imperial gallons. For comparison sake, a new MB E350 diesel is rated for 57.6mpg extra-urban in the UK and 32mpg hwy by the US EPA.
A forum community dedicated to BMW owners and enthusiasts. Come join the discussion about Bimmerfest events, production numbers, programming, performance, modifications, classifieds, troubleshooting, maintenance, and more! Bringing the BMW community together.