Well the exhaust is in the style of the 1911 Coupe de l'Auto Delage as seen in the hands of Sir John Briscoe. I still can't find this car though so I can stay below 400 points for a bit!
You spotted that huge clue, Allan. It is indeed one of the 1911 Delage team cars, mildly modified. In this photo it is shown at a well-known racing site, and had a nickname, which was not uncommon at the time.
LOCKED for you - name of driver and nickname of car for one point.