What is the difference between TFSI and TSI?

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Tags

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2. #while
3. #petrol
4. #stratified
5. #turbo
6. #acronym
7. #direct
8. #forced
9. #charger
10. #induction
11. #previously
12. #stated
13. #gasoline
14. #injection
15. #concept
16. #engine
17. #having
18. #volkswagen