Looks like it is the Nardo project Type 44
I don't know if you read about this one
She has a 25 valve special motor
http://www.audisport.ch/forum/36-forum- ... ecord.htmlhttp://www.bufkinengineering.com/talledega.htmhttp://www.audistory.24max.de/old1/html/e25v.htmThe Nardo's car had a cat, and was eligible on open roads
Engine was a 2.2 liters, Turbo, 650Hp and carried 340 gas liters (88 gallons us)
Many parts were made in aluminium (doorshells ..)
Pit stop lasted 25seconds each, they changed the pilot, oil, filled up 88 gallons, replaced all 4 wheels and did some cleanings.
During the "Expedition Nardo" Audi broke several records, 324.509kmh (201.641 miles / hour) over a distance of 500 miles, and 326.403 (202.817 miles / hour) kmh over a distance of 1000 kilometers (621.371 miles).
The car was tested at more than 400 km/h (248.548 miles)
I don't know if it helps anything, but it's hard to find information on this car and a few people heard of this superspecial 25valve engine.