The award-winning TSI technology offers great performance with fuel economy and low emissions. TSI is a pioneering technology for petrol engines. At the heart of the TSI is a smaller engine. It is more efficient as there is less power loss resulting from friction. It's also lighter, so the engine has less weight to shift in the car. Direct petrol injection is combined with a turbocharger or charge compression with a turbo and a supercharger working in tandem. This enhances the engine's combustion efficiency so the TSI engine power output is much higher than that of conventional, naturally aspirated engines. TSI engines are designed to deliver maximum torque from which is good for driving and fuel economy.