It took a while for it to be unseated, but since then many faster cars have been added to the game, with the Progen Emerus currently best. Here's a quick history lesson: For the longest time, the Pegassi Zentorno was the crowned king of racing in GTA Online, but now it's not even in the top 5 as far as lap times go. Lap times are taken from Broughy's specifically designed test track. These are the overall fastest cars around any course when racing in GTA Online.