Originally Posted by
Chernaudi
and Audi on the R10 engineered the road-going TDI system to try and improve it through racing.
Perhaps just for the record, audi used the R10TDI to further develop their common rail system for direct injection diesel engines, which VAG only introduced about 10 years after Bosch and Fiat had developed it and which is now standard on all modern diesel engined car.
Audi/VAG initially used the pumpjet for roadcars, which ultimataly proved to be inferior to the common rail system (noise, emissions, sweetness) That they still call it TDI just has to do with marketing, changing the name would be tantamount to admitting that they choose the wrong system to begin with....
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