It is currently Road Safety Week on the island, but that did not stop the driver doing nearly three times the 35mph speed limit along Vazon Coast Road.
In April, a 19-year-old passenger died on the road when the car he was in overturned while travelling at high speed.
Following the latest incident overnight, Guernsey Police this afternoon released a message emphasising that driving at such speeds in Guernsey is reckless and dangerous as well as illegal.
“At nearly three times our speed limit, 91mph is too fast for a motorway, never mind local roads,” said the Police.
“Be under no illusion, you make a mistake at that speed and it’s highly unlikely you’ll be walking away from it – nor will anyone else you hit.
“There is no time or place on this island where it’s safe to go anywhere near that speed – it is [a] lethal level and it has no place on our roads.
“We were serious with our Road Safety Week messaging earlier this week: nothing is worth driving so fast that you’re putting lives on the line.”