Fundamentally stronger: the engine block
Compared with its starting version with an output of 147 kW (200 bhp), the 195 kW (265 bhp) engine of the S3 fundamentally represents another evolutionary leap. Pistons with stronger pins and new rings as well as reinforced connecting rods with new bearings transmit the powerful forces to the crankshaft. The cylinder block has been reinforced at the main-bearing pedestals and the main-bearing cap.
The cylinder head consists of a new, extra-lightweight aluminium-silicon alloy that exhibits high temperature resistance and strength.
The exhaust camshaft timing and the high-pressure injectors with increased cross-section have been adjusted to accommodate the increased power output.
The new turbocharger has a larger turbine and compression rotor than the basic unit. Its cast steel casing produced as a single piece including the manifold withstands exhaust gas temperatures of up to 1,050 degrees. The turbocharger generates a boost pressure of 1.2 bar instead of 0.9 bar on the starting version.
The intercooler: 850 kg of air per hour
An intercooler drastically lowers the temperature of the compressed air, thus increasing the amount of air that is necessary for combustion. Both its housing and the mesh through which the air passes are made from aluminium; the depth of the mesh has been increased, resulting in considerably greater efficiency. The intercooler is capable of an air throughput of up to 850 kilograms per hour or, put another way, over 650,000 litres of air.
The new high-performance turbo engine tips the scales at only 152 kilograms, significantly less than comparable engines from direct competitors with a positive impact on the axle load distribution and therefore on handling characteristics. With its compact dimensions it is just 652 mm long, 648 mm wide and 666 mm high the TFSI is ideal for transverse installation.
Whatever tasks the driver wishes the engine to perform, the powerful TFSI accomplishes them with ease, thanks to its 195 kW (265 bhp) at 6,000 rpm. As a high-performance sports engine, it revs up effortlessly, responds intrinsically well to the throttle and produces strikingly sonorous acoustics. The four-valve engine with undersquare configuration is simultaneously impressive for its powerful traction. It puts 350 Nm of torque onto the crankshaft even at engine speeds as low as 2,500 rpm, and is able to maintain this high level of torque up to 5,000 rpm.