I see some good tests of mtb vs road bike on dirt and pavement. Zwiftinsider.
But how many more watts would I need to put out riding a mtb in a pack, when compared to a road bike?
I joined a group ride today and the advertised pace was a little too low for what I wanted. Got me thinking what would happen if I switched to a mtb. Ideally wanted to make the ride 0.5wkg harder.