The deal effectively means that Minorplanet, which GE Equity has an interest in, has opted not to take vehicles from its sister company GE Capital Fleet Services by placing the order with Wundercars.
It is understood that 60 of the cars delivered will be Volkswagen Golf 1.9 TDI models. One source close to the deal said the company was looking to source a further 75 cars, 60 of which could be Ford Focus LXs.
He said that the cars were not just being sourced for sales representatives but also for Minorplanet's engineers. No one at Minorplanet was available for comment on the deal.
Until now Wundercars focused on importing cars for fleets and hopes to capitalise on its sourcing experience in a bid to boost its fleet appeal.
Bob Parker, the company's general manager, said: 'Our experience of sourcing cheap cars will give us an edge over competitors. As an internet-based company we have no showrooms and reduced overheads.'