The Ultima GTR720 made the fastest lap around the Top Gear track beating
Michael Schumacher's lap in a $2,500,000.00 Ferrari FXX by over 1/2 a second.
http://www.youtube.com/watch?v=IZUdU_zYvhM
A fully built GTR with whatever motor and trans you put in it will cost less than $200,000.00.
YOU DO THE MATH
I though the Gumpert Apollo was the fastest? Has that changed?