Audi let its new diesel-powered R18 LMP1 enclosed prototype loose on the U.S. for the first time for testing over the four-day weekend surrounding the 12 Hours of Sebring. Audi tested both R18s, chassis 101 and 102, against an R15 for a control group. The first U.S tests garnered feedback from all 10 of Audi's factory drivers.
The tests put a beating on the R18s to make sure their aerodynamics, reliability and fuel economy all stacked up to the standards set by the previous generations of Audi's diesel LeMans prototypes.
Their next stop is Ingolstadt to be fully disassembled and checked out, before being shipped to LeMans for the 24-hour race in June. Trust us, you owe it to yourself to see the images below in their full high-res glory.
