Peugeot Sport's engineers and even its computer predicted a slower theoretical top speed for the run - estimated a best possible run a massive two seconds slower.
"I'm really happy as that was a very good run in the end," said Loeb. "I really didn't expect anything better than 8m15s, so to do 8m13s was fantastic. Before the start I didn't really know if I should push absolutely to the maximum or if I should just push to a comfortable pace, in order to make sure of the victory. In the end, I decided to push to the limit."
He was the first to run in the hard-fought Unlimited class - which saw Rhys Millen's father Rod and Suzuki Motorsport's Nobuhiro 'Monster' Tajima swap records for over a decade.
Rhys Millen was second in the class in his all-new Hyundai RMR PM580-T, 49 seconds behind Loeb with a time of 9m02.192s.
"I think it's fair to say that we were racing for second place today," said Millen. "Myself and Romain Dumas had been really close throughout practice, but then I heard that his engine had unfortunately broken at the start. I knew I wasn't going to beat Sebastien's time, so I just decided to take no risks. You have to hand it to Loeb and Peugeot Sport: they were unbeatable. That time they set was simply incredible. When will it be beaten? It might never be..."
Watch this space for video of the record-breaking run.
Ari Vatanen also claimed the record for Peugeot, in 1988, driving a Peugeot 405 T16 and setting a 10:47.220 mark. His effort can be seen in the stunning film Climb Dance (see below).