DevBot 2.0 achieved a time of 66.96 seconds with a top speed of 162kph during last weekend's Goodwood Festival of Speed.
That's nine seconds faster than the unofficial time set by Robocar at last year's event.
"The team are thrilled to have set the first ever official time for an autonomous vehicle at the Goodwood Festival of Speed hillclimb," said Roborace chief strategy officer Bryn Balcombe.
"We've now opened access to these vehicle platforms for research, software, sensors, compute & simulation innovations that will push these boundaries forward. Come join us on the journey!"
DevBot 2.0 is the hardware being used by all teams in the current RoboRace Season Alpha. The idea is that they compete on the quality of their software, much like the way one of the RoboCup robot soccer leagues standardises on the NAO humanoid robot.
But to put DevBot 20's result in perspective, Volkswagen's electric ID. R set a record of 39.9 seconds for the hillclimb, nearly two seconds faster than the previous record set in a McLaren Formula One car.
Goodwood Festival of Speed general manager Dan Garlick said "We saw the DevBot 2.0 raise the bar for what autonomous vehicles can achieve, which was fitting during a weekend when Volkswagen's all-electric ID.R demolished the 20-year-old record for the outright fastest time on the Hill. Roborace has brought a whole new story to the sport that has really struck a chord with the crowd."