1991 Mercedes-Benz C291

 
Downforce:
3476 lbs. @ 150 mph, with 695 lbs. of drag
5005 lbs. @ 180 mph, with 1001 lbs. of drag
6179 lbs. @ 200 mph, with 1236 lbs. of drag

Lift-to-drag ratio:  5:1

Reference:  Karl Ludvigsen's Mercedes Benz: Quicksilver Century, "in the region of 5000 lbs. @ 180 mph, L/D: as high as 5:1"

ęCopyright 2004, Michael J. Fuller