 The R113 is a concept roadster version of the C113, with only 2 made.Before the Orca 133 Platform was cancelled, the R113 was going to be fastest street worthy car in the world (0–100 km in 2.5 seconds).Almost nothing is known about the R113 concept, except it uses the same Audi twin turbo V8 as the Beck LM 800, other performance info is below.