What is the difference between VN turbo and VG turbo?

Answer 1

Variable Nozzle Turbo (VNT) or Variable Geometry Turbo (VGT) is similar. These days, all Common-rail direct injection Turbo Diesel engines are capable to deliver massive horsepower and torque. All thanks to the technology of VNT/VGT.

With this system, the turbine on the intake side has movable guide vanes that change position to provide optimum flow conditions and a high turbine efficiency rating, throughout the engine speed range. This permits high boost pressure from low engine speeds, and thus a flatter torque curve and higher power output.