I’m using Zwift since a few months and was only riding single rides with no reference to group rides/races… However, with the TDZ stage 1, I found out that my colleague who did the same race and distance was significantly quicker with having the same Watt.
I red some Zwift articles about weight, drafting, stage type and bike. We do have a slight different weight, but finishing 5 min later with identical watt and only 27km is really guessing for me?
TDZ stage 1 Flat:
my result
Time:46:06 min
ave Watt: 216W
Distance 27km
Colleague
Time: 41:16 min
ave watt: 215W
Distnace: 27.8
1 - We don’t know the weight difference between you and your colleague.
2 - He could have been in a much bigger group which would naturally go faster because of the draft benefit.
Also I believe that where you spent the watts over the course can have a lot of impact. eg. going above your average on uphills and less than your average on downhills will likely net a faster avg speed over the course than spending the average wattage on both uphills and downhills.
Probably a bad illustration, but whatevs. If you put out consistent 200 watts on a course that goes 10km up a 5% hill and then down again at -5%, it will take roughly an hour. OTOH, if you put out 300 watts on the uphill and then 100 watts on the downhill and still ‘average’ ~200 watts over the full 20km, you’d shave somewhere in the ballpark of 10+ minutes off your time.
Do you and your friend use any other training platform where you could compare Normalized Power (Zwift doesn’t show this metric)? HIs might be much higher.
For the same absolute # of watts, on flat or uphills, the heavier person will go slower (all else equal like aero). I think you meant ‘putting out the same watts/kg’ – in which case the heavier person will be going faster (I think) on a flat.