I don't have time to format this properly as an article at the moment, but have you guys seen this? http://infinitinews.com/en-US/infin...ction-ready-variable-compression-ratio-engine Apparently Nissan has developed a variable compression ratio engine that works a little like variable valve lift, except it varies piston travel. They're claiming that it varies physical compression ratio between 8:1 and 14:1 to better control combustion in high-power and high-efficiency situations alike. I guess this will be replacing the current Mercedes-Benz sourced 2.0L in the Q50 and Q/QX30? It'll be interesting to see what it delivers in the real world.