Turbocharged Direct Injection (TDI) Diesel Engines

Turbocharged Direct Injection (TDI) diesel engines are responsive and fun to drive, as well as being very efficient. They offer more power, with great fuel economy, which all helps to lower emissions.

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Why drive a TDI?

  • You’ll enjoy the savings. Economical fuel consumption, long service and maintenance intervals, plus low emissions, all combine to keep costs low.
  • You’ll love the drive. Our turbo diesel engines offer exceptional torque even at low revs. This results in tremendous fun at the wheel, thanks to their effortless acceleration and sparkling performance.
  • You’ll feel the power. High levels of pulling power over a wide rev range offer real driving pleasure.

TDI identifies all our advanced diesel engines using direct injection and a turbocharger. TDI engines are economical and smooth with high levels of torque (pulling power) and good energy efficiency.

How does it work?

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Fuel needs oxygen to burn and the engine has to be supplied with huge quantities of air to get enough. You can solve this problem with a bigger engine – or you can solve it with a turbocharger – as in the TDI. Driven by the exhaust gases, it squeezes air more tightly into the cylinders.

After being drawn through the turbocharger the air is then cooled by passing it through an air to air intercooler (cool air takes up less space than hot air), before entering the combustion chamber where diesel is injected directly into the cylinders at very high pressure through a nozzle. It’s this intensive mixing of highly atomized fuel with the cooled compressed air that leads to better, more efficient combustion.

Your driving experience is quiet and refined because effective sound insulation keeps noise to a minimum, while hydraulic engine mounts ensure smooth, low-vibration running.

Turbocharged Stratified Injection (TSI) Engines | TSI Technology

TSI technology offers you great performance with fuel economy and low emissions.

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TSI engines offer an enjoyable and involving drive, while cutting fuel consumption and CO2 emissions. Because TSI engines are cleaner, you’ll also save on car tax. So they have a smaller impact on the environment, are kinder to your pocket – and, best of all, they’re great fun to drive.

What is TSI?

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TSI is our pioneering technology for petrol engines. TSI engines are compact, high-powered and use less fuel. TSI technology blends the best of our TDI diesel and FSI (Fuel Stratified Injection) engines.

The successful TSI formula combines a number of different elements:

Smaller engines
At the heart of TSI is a smaller engine. It’s 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 with charging
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.

Torque when you want it
On the TSI T1.4 160PS the engine-driven supercharger operates at lower revs, with the turbocharger – powered by the exhaust gases – joining in as engine speed rises. The supercharger is powered via a belt drive directly from the crankshaft. This provides maximum pulling power on demand, even at very low engine speeds. TSI engines are designed to deliver maximum torque from engine speeds as low as 1500 or 1750 rpm. And that has the twin benefit of not only increasing your driving pleasure but also cutting fuel consumption.

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