VTG turbo Updated 12.10.2009 The exhaust gas turbocharger was invented over 100 years ago: On 16 November 1905 Swiss engineer Dr. Alfred Büchi received patent No. 204630 from the Imperial Patent Office of the German Reich for a "combustion machine consisting of a compressor (turbine compressor), a piston engine, and a turbine in sequential arrangement". BMW was the first to introduce a turbocharger on a series production car. The BMW 2002 Turbo 2-door sedan was introduced at the 1973 IAA in Frankfurt. A year later, in October 1974 Porsche launched the world's first series production sports car with an exhaust gas turbocharger - the 911 Turbo was born! Introduced with the 2006 911 997 Turbo, Porsche presented the world's first turbocharged gasoline engine with Variable Turbine Geometry (VTG). This technology featured in turbocharged diesels since the '90s helps to minimize the biggest problem with turbochargers - the turbo lag. So far, however, much higher exhaust gas temperature (up to 1000° C) has always proved to be an unbreakable barrier. But for 997 Turbo, Porsche has solved this problem in close cooperation with Borg Warner Turbo Systems by using high temperature-resistant materials from space technology. The core features of the VTG system are the variable turbine blades. The principle of variable turbine geometry thus combines the benefits of a small and large turbocharger all in one – a combination ensuring both very good response and high torque at low engine speeds as well as superior output and high performance at high speeds. And the supreme level of torque is now maintained consistently throughout a much wider speed range. Low blade angle at low engine speeds and steep blade angle at high engine speeds What we think: Excellent idea and super technology. As they have moving parts, they cannot be as reliable as the old-school propellers are, but if their life expectancy is anywhere close to the normal turbochargers, they are a great step forward. The exhaust gases in turbocharged cars are allowed to escape to the atmosphere only after they have visited the turbochargers. That is the reason turbo cars do not have that muscular sound which other powerful cars have.