According to Google Maps information, to drive with the car from London to Torquay takes three hours and forty three minutes and to get to Torquay from London with the train takes five hours and twenty five minutes. In case of flying, the flight takes only one hour and ten minutes.
The next train from London to Torquay, with one change, starts out on 11:45 p.m. from London Paddington (www.thetrainline.com).