Which used Peugeot 206 estate should I buy?
You're best off with the 110bhp 1.6 HDi engine, which is powerful and punchy. However, this appeared only in later cars.
If you're considering an earlier model then plump for the 2.0 HDi. You only get 90bhp, but that's better than you'll get from most of the petrol engines in the range, and it's enough to make decent progress while still giving good fuel economy.