The VW TSI engine
On variable compression ratios for the engine:
Audi Technical chief Ulrich Hackenberg gave no details on how Audi will introduce variable compression ratio technology, but what this means is that the car's engine can have a high compression ratio of a direct injected petrol engine of around 15:1 and when under high loads especially if it is turbocharged and boost is coming on drops to say 11:1. The luxury of being able to have variable compression ratio depending on the load and power demands makes this something all engineers chase after. It would be ultra efficient too.
