If you look at the measured values at the RRI (=Rototest Research Institute), then you have to find out that especially the models of Porsche are far below the factory specifications for power and torque. Examples: Porsche 911 Carrera 4 Cab: 259 instead of 300 hp Porsche 911 GT3: 330 instead of 360 hp Porsche 911 Tiptronic S: 232 instead of 286 hp ! Porsche Boxster Tiptronic 2.5: 169 instead of 204 hp Porsche 911 Turbo: 388 stat t 420 hp Porsche Boxster S 3.2: 254 instead of 280 hp Porsche Cayman S Tiptronic: 259 instead of 295 hp Most cars also move within the 10% tolerance of the RRI, most Porsches are clearly outside this range. How can this be, when Porsche is always talking about minimum specifications?