Infiniti announces major breakthrough with first production-available variable compression ratio engine image

The Japanese automaker has decided to introduce the production-ready version of its new Variable Compression-Turbocharged (VC-T) petrol engine, which has been developed over the course of the past two decades.

The production-ready version comes with 268 horsepower (200 kilowatts) and 288 pound-feet (390 Newton-meters) of torque and can autonomously adapt to lower or raise the height the pistons travel. This means the compression ratio can vary between 8:1 and 14:1, thus marrying the best of both worlds – high performance and scarce fuel consumption. Watching for the driving conditions, the engine’s control unit can deliver the optimum ratio for maximum performance or efficiency. Infiniti says this new engine is smaller and lighter than conventional units, with low noise and vibration levels – the four-cylinder, 2.0-liter VC-T unit is also about 27 percent more efficient than the 3.5-liter V6 it will replace.

INFINITI four-cylinder turbocharged gasoline VC-T engine

It’s also cheaper to produce than turbodiesel engines and should easily comply without extensive modifications with nitrogen oxide and other emissions rules in markets with tough laws. Nissan senior engineer Kinichi Tanuma added this could be a viable alternative to turbodiesel units and would become even more efficient with the implementation of a gasoline-electric hybrid setup. The new motor will premiere on September 29 at the Paris Motor Show, with the first model to be using it being the new generation QX50, expected next year.