Cost of living in Dortmund (Germany) is 100% more expensive than in Adapazarı (Turkey)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 176 prices entered by 21 different people.
For example, you would need at least 6,805TL (€1,581) in Dortmund to maintain the same standard of living that you can have with 3,400TL in Adapazarı.