"TSI at Volkswagen stands for the route to sustainable mobility of the future. Compared to other motors, the TSI engines show an appreciably better record over their full lifecycle in terms of fuel consumption and exhaust gas emissions," explained Middendorf in his acceptance speech in Stuttgart.
A total of 65 motoring journalists from 32 different countries assessed the engines in the test on driveability, noise levels, smooth running and fuel economy. Thanks to the twincharger principle of an exhaust turbocharger and a supercharger, the 1.4 TSI was seen to have especially high pulling power and efficiency.
The judges will also have been impressed by the fact that the 1.4 TSI engine achieves excellent results not only when running on petrol, but also as the base engine for the gas-powered Eco-Fuel models.
Based on the EA111, this new engine was announced at the 2005 Frankfurt Motor Show, to be first used in the Mk5 Golf GT, the 125 kW 1.4TSI engine is a Twincharger, and uses both a turbocharger and a supercharger. Its displacement downsizing leads to improved fuel economy, with 14% more power than the 2.0 FSI, but consuming 5% less fuel. The mechanical supercharger compressor, driven at 1.5 times the speed of the crankshaft, mainly operates at low engine speeds up to 2,400 rpm to increase low-end torque. The turbocharger assumes full effectiveness at middle revs, and the car disengages the clutch-controlled supercharger at about 3,500 rpm.
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