HDI em pee gees

[Rippthrough]

I got 730 out of the 1.4 on a tank doing long runs without being particularly gentle with it, so that out of a HDi isn't unbelievable if driving like my nan.

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and a non aerodynamic shape with a horrible dead air vaccuum space behind the back end etc etc.

I'd do some more reading on aero if I were you Tom....