The regulation is quite clear: in any EU country, inspection must happen at least every 2 years for vehicles older than 4 years. I understand that Finland allows a 4 year gap after first registration. After that, the max period is still 2 years. Individual countries may also require 2 years (or less) during the first 4.
Again, just because that's the case in Finland doesn't mean it's the case everywhere in Europe.
The maximum in EU cannot be two years if any EU member state allows more than two years.
The regulation is quite clear: in any EU country, inspection must happen at least every 2 years for vehicles older than 4 years. I understand that Finland allows a 4 year gap after first registration. After that, the max period is still 2 years. Individual countries may also require 2 years (or less) during the first 4.