In a message dated 96-08-12 12:54:36 EDT, withu@loxinfo.co.th (R. Wiratorn [Thailand]) writes: << anyone knows the frontal area in sq.ft. of Audi S4 or 100 or A6 ? I need it tocalculate the top speed of the car. >> Frontal area of the basic A6 sedan is 2.12 square meters (the wagon is 2.14) Coefficient of drag is 0.32 (wagon 0.34)