I'd guess it takes me about 2x longer on the bike. Some of this is bike and gear choices, some is my medical problems and fitness. At best, I think it could be 1.5x longer on the bike.
If I were breaking down my morning into what portion of it is getting ready to ride I think finding the exact start point would be difficult. Was it when I changed out of pajamas into bike shorts? When I packed my lunch? Do I include the daily wasted time finding all the pocket stuff I've strewn around the house?
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Genesis 49:16-17
"Well, well!" said Holmes, impatiently. "A good cyclist does not need a high road. The moor is intersected with paths and the moon is at the full."