How to imrove MPGs - streamlining
The cars aren't heavy enough for weight to totally account for the mpg figures. I really think that a large reason for the slightly low efficiency of these cars (particularly at speed) is the design of the headlight clusters. You've basically got a pair of small parachutes above the bumper, trapping air.
I think that if there was some kind of glass or plastic across the entire front of the light clusters, flush with the bumper and perhaps slighty sloped vertically toward the bonnet it would really help. This would reduce drag coefficient quite a lot, possibly create a bit of lift if it is sloped toward the bonnet enough, and probably give us several mpgs more. A bit like how they enclosed the lights on the E-type Jag on some series of the car. In fact, if and when there is a facelift, I wouldn't be surprised if a deflector like this was included, or in fact made up the majority of the face lift.
Now is there a more practically adept person who can knock up some kind of transparent plastic deflector as I describe above so we can run some motorway tests?! There could be a big market in retrofitting these...
Brat Pack no.8