December 14, 2017 INFINITI 3.0-liter twin-turbo V6 makes Ward’s 10 Best Engines list for second consecutive year The INFINITI 3.0-liter twin-turbo V6 engine was named to Ward's 10 Best Engines list for 2018 model year. The VR-series engine has the distinction of being one of just two engines on the list to receive the award for a second consecutive year.