The 2019 QX50 is powered by INFINITI's new 2.0-liter VC-Turbo, the world's first production-ready variable compression ratio engine – one of the most advanced internal combustion engines ever created. The VC-Turbo changes its compression ratio seamlessly with an advanced multi-link system, continuously raising or lowering the pistons' reach to transform compression ratio – offering both power and efficiency on demand. A high compression ratio gives greater efficiency, but in certain applications poses the risk of premature combustion (knocking). A low compression ratio allows for greater power and torque, and avoids knocking.
