A lucky picture at Goring on 12 April 2008 shows examples of both classes of 'Turbo' unit. On the left 166214 is rapidly overtaking 165114 whilst working the 08:30 Oxford to Paddington First Great Western service. On the right, 165114 is traversing exactly the same route, but is having a much more leisurely journey stopping at all stations. It left Oxford before 166214 at 08:21, but will arrive at Paddington exactly half an hour after the 166. Twenty years ago the local services would have been operated by Class 117 DMUs, so therefore a 'Turbo' unit is an improvement, but the Oxford to Paddington 'fasts' were operated by Class 47s or 50s and coaches, so a three car unit is definitely not an improvement!