Not sure if the more recent cars have the longer fuel gauge (280 vs 240 mm) VDO 224011000280G (Europa)) that was fitted by many early users to reduce (but not eliminate) the uncertainty of the fuel% readings. The whole system is a bit of a random number generator with gauge at back of one tank and only moderate balancing flow between the relatively shallow tanks so affected by both pitch and roll coupled with a slow averaging algorithm in the gauge. Long story short - the longer gauge gives more confidence...
