Companies currently using the service include BT, IBM, Gallagher and the National Grid. Under the scheme, company car drivers within six months of ordering a new car can each order two 48-hour Vauxhall test drives using the online e-voucher.
The manufacturer plans to roll-out the scheme to another 10 major fleet operators soon and will further increase the number of companies using the system by the end of the year and beyond.
Vauxhall demonstration fleet, under demonstration operations manager Paolo de Luca, has now made some 750 new Vectras, both petrol and diesel, available for test drives.
They make up part of a 5,000 strong demonstrator fleet, both short and long-term, that includes the full range of Vauxhall cars and vans, including later in the year the LPG (liquefied petroleum gas) version of the new Vectra.
'We are boosting the demonstrator fleet to cater for the increased demand we expect from the launch of new Vectra, and the addition of models such as the Astra Turbo Coupe,' de Luca said.