M3 E92
http://www.rri.se/popup/performancegraphs.php?ChartsID=768
98 RON
Curb weight, kg 1611
Discrepancy (measured/stated) Power / Torque -10% / -8.5%


M3 E46
http://www.rri.se/popup/performancegraphs.php?ChartsID=576
98 RON
Curb weight, kg 1562
Discrepancy (measured/stated) Power / Torque -11.5% / -6.5%


Z4 M Roadster
http://www.rri.se/popup/performancegraphs.php?ChartsID=606
Curb weight, kg 1467
Discrepancy (measured/stated) Power / Torque -6.5% / -5.5%