Ten years ago, we compared the acceleration on an absolutely empty Autobahn between a US 911SC with 180 hp and a Roadster Sports 3.0 series 3 with 223 hp. So that it wasn't too unfair for the Roadster due to the increasing air resistance, the acceleration was from 70 km/h to approx. 130 km/h. In the end, the Porsche was clearly one or two car lengths ahead of the Roadster. Apart from the better gear ratios, I suspect that the 911 had very little drag, neither a cardan shaft nor steerable drive shafts as in the front-wheel drive.
When Lorne says a Morgan has more drag than other brand newer cars, maybe it's due to slippage in the measurement of the light car, or does the differential in a rigid rear axle have more friction than more modern half shafts?
