Consumption S80 – 205 or 215 hp – hand switch

My current Audi A3 1.6 TDI 105 hp consumes approx. 5.2 l to 100 km. A little more (7.0 – 7.5 l) the successor should consume and be a bit more frugal when overtaking it. According to previous research, XC60, XC70, V70 automatic and S80 automatic consume too much (more than 8.0 l lt. fuel monitor). The 163 hp diesel fall out, as not significantly faster than the A3. The V70 also weighs 100 kg more like the S80. So I tend to the S80 215 hp hand switch. a.) Does anyone from the practice have experience what it consumes? b.) 215 hp and front drive – does the grip? c.) 215 hp and hand-operated switch at all – does this work harmoniously? Alternatively, I think about a VW Passat 2.0 TDI 170 DSG Allrad or an Audi A4 3.0 TDI hand-receiver 204 hp.