Your question is soooo imprecise - outline 'fastest' please. excellent-p.c., acceleration, fastest-lap of a given song, fastest a million/4 mile drag-strip performance? accepted, changed, racing, or purpose-outfitted one-off to break a given list? not adequate suggestion there, sorry. Oh, and in spite of the actuality that the Ariel Atom with the V8 engine is geared to drag 'really' about 175mph, it is going to out-boost up and out-nook and out-brake almost each and everything obtainable even as doing so. AND the ridiculous Veyron is beset with the project of RAMPANT gas-intake, because of it is LUDICROUS weight. it is been precise that the gas-tanks empty in less than 12 minutes even as the motor vehicle is being pushed quickly - so after very few 50 miles or so, you would could pull in to a with ease-positioned petrol station, go out the motor vehicle, pump one hundred forty litres of gas, pay for it, come again into the motor vehicle, boost up back as a lot as p.c., and 12 minutes later, attempt this each and every body back! in the period in-between, some thing as mundane as a slippery Audi with a quicker-diesel engine can preserve a much better accepted p.c., pulling some hundred miles of variety from its' tank. Tortoise and the Hare delusion, all yet back. Veyrons are gruesome, fat, heavy, and they suck. And an Ultima GTR is a lot swifter around the great-equipment try-song.