Najbrži? Rimac Concept One.
"With a total output of 811 kW (1,088 hp)[10] and 1,600 N·m (1,200 lbf·ft) of torque, the Concept One will sprint from 0–97 km/h (0–60 mph) in only 2.8 seconds and will come with an electronically limited top speed of 304 km/h (189 mph)."
http://en.wikipedia.org/wiki/Rimac_Concept_One