The Engine Room encompasses three great companies to service your every need regarding nearly new, used cars. Champ Cars cater for the higher end of the market supplying the GB Roadster and many other prestige and luxury sports cars. County Car Mart is literally the first place to buy your second hand car, regularly stocking 50 plus quality used cars. We are also a Chevrolet Main Dealer offering new and approved vehicle sales and service, we are also a Vauxhall Masterfit Authorised Repairer and can provide full MOT facilities. All three are based in Bicester, Oxfordshire, located on the A34, very close to the M40.