Porsche 911 Turbo 3.3

The car called the 911 Turbo 3.3 had an output of 221 kW (300 hp) at a speed of 5500 rpm. This was achieved by increasing the displacement from 3.0 to 3.3 liters, increasing the compression ratio of the six-cylinder boxer engine to 7:1 and also using an intercooler. The intercooler used for the first time in a series vehicle meant that more air mass reached the cylinders with the same compression through the turbocharger, because the specific volume decreases during cooling ("the air contracts"). At the same time, compression can also be higher due to the lower temperature, because the tendency to knock increases with the temperature of the compressed gas. Only this improved internal cooling allowed an increase in compression. The new 930 still had a four-speed manual gearbox, which was capable of a top speed of 260 km/h and acceleration from zero to 100 km/h in 5.3 s.