There have been weeks when it’s not been possible to get outside on the bike and I’ve recorded 100+ miles at over 20mph average.
A bit vague, what turbo?
Ive done 100mile group rides at nearly 25 mph on a flat courss, but its no walk in the park with an average for me 240 W for 4 hours. Compare that wattage riding solo the speed is around 20-21mph.