' Speedsters weight advantage '
At 60-mph, with drivers, the weight advantage of the Speedster, compared to the Coupe would knock off 0.8494- hp from the car's road load. About 0.9036-bhp.
If you already know the BSFC for the VW's 1582-cc engine, you can figure the mpg savings at that road speed. It won't be much.
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The Speedster returned 31.6-mpg actual HWY.
The Coupe saw 35.2-mpg, with greater weight, and larger frontal area.
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