Virtually all vehicles can be tested on a roller dyno. Of course, there are always exceptions. This may be due to the type of roller dynamometer, the vehicle, etc. Always check with the dealer what the conditions are for a test on a roller dyno.  The roller dyno test shows exactly the power measurement of your vehicle. In an extremely precise measurement, the power and tractive force are calculated. This is possible in combination with a chiptuning, which ensures an exact tuning for your vehicle, a custom tuning.  Another function of a roller dyno in chiptuning is when writing chiptuning software yourself, as chiptuner Rica Engineering has been doing for over 30 years, the developed software can be measured and tested extremely precisely, before it is put on the market.