Not a chance Lance would beat Contador if both were in their prime. We'll see why this year. Not the best hypothetical scenario either. I believe currently the riders Auscycle mentioned would all beat Lance at the Tour if they raced this year. But I feel Evans and Sastre are going for the Giro. Maybe not Evans, but Sastre is almost a guarantee for the podium in Italy. If Lance were to have been born, 5 even 8 years later, the whole dynamic changes, hence the bad hypothetical. So this can't be based on form then and now. Then, Lance beats them all, but Contador has that role now. Lance today, I think he beats none of them if they are aiming for GC and they don't have an issue.
The other part is to compare the GC winners now and their opposition. Beloki was great for two seasons, Pantani was better than Lance in 1999, but lost it all cause of his ban. Ullrich was solid for periods and so was Zulle. In terms of analysing how those guys rate next to Lance and how the others rate next to Contador, they are about equal. Going on winning margins, Contador has had some close wins, so to Lance, but there are also the wins by significant margins.
Changing the hypothetical facets, if Lance had have kept racing, the idiots would have let him run amock. Not because he was better in 2005 and hypothetically in 2006 would have been similar, but because the race dynamics were Disco dictated terms and everyone followed suite. Noted exception to CSC, but Sastre wouldn't have beaten Lance, assuming Puerto happened and Basso was out. Look at 2006 and Pereirro. That wouldn't have occured a year earlier. So Lance could have won in 2006, but not 2007. Rasmussen was on fire. He'd have been hurt in the hills. He might have gotten second or third, but wouldn't have gotten 3 minutes on the Chicken that he had when he was banned. In this scenario, he would not have been kicked out. Take out Vino's crash and he'd have beaten Lance to. No need to even ask if he'd have beaten Evans let alone AC that year. Rasmussen would have won. Then 2008 changes. See how dynamics fluctuate. Would Contador have been on Disco? I doubt it. Would Disco transfer over to Astana? Nope. Sponsor would have remained or another found. Everything changes and then we can't use the actual race conditions to find an answer for 2006, 2007 and 2008. Hypotheticals of this nature are far too complex.
What we can say without a doubt, is that for 2009 what we have seen is Lance can't rely on his team to break everyone. They don't break the Schlecks and they didn't even faze Contador. Lance also can't rely on his famous ITT. That is his biggest misfire. Plus the race is no longer designed for Disco/Shack only. Beloki and Ullrich were better or equal to Lance and suffered because of course design. So to Mayo and Heras because of team strategy and who they worked for. So the competition is even for both periods, I think slightly better for positions between 3-7 these days. I for one will be shocked if Lance beats Evans, Valverde and others I've mentioned on other threads this year. He won't come close to the Schlecks and Contador in the mountains and will not go in front of Evans or Valverde in a chrono. He'll be lucky to stay with them this year. I think a simpler way is to ask is the competition amongst the top ten harder now. Most would say a solid yes.