Suppose some wine from the first century AD was found. Would it by

[raccoon]

any stretch of the imagination be still drinkable?

[Wickerman]

1. Doubtful

Conditions would have been optimal over time. Very unlikely those conditions could have been maintained.

[Lochloosa]

2. Most likely some really old vinegar

[xchrom]

3. Could be some really good vinegar. Nt

[Ozymanithrax]

4. Some years back, on one of the Old Jock Cousteau show...

They found a sealed Amphora of wine from the Roman age. It was bad. The wine they find at the bottom of the Baltic exist in very specific environments.

[MineralMan]

5. Only if Jesus had made it. Then it would still be fine.

Miraculously... :shrug:

[Sancho]

6. Might be in a lead lined bottle...

or any other number of reasons not to drink it....recently some champagne was found underwater that was still ok after a couple hundred years in sealed bottles in cold water.

http://www.suite101.com/content/230-year-old-drinkable-champagne-found-on-shipwreck-a262828

The oldest drinkable wine known now is 1727:

http://www.finestandrarest.com/german.html

This is, quite simply, the oldest drinkable wine in existence.
Here are Michael Broadbent's notes on this wine:
This wine comes from a large cask in the famous ’12 apostles’ cellar beneath the Town Hall or Ratskeller in
Bremen. The first time this appeared in a Christie’s wine catalogue was in 1829 when it sold for 5 pounds per
dozen, a high price at the time. An occasional half bottle has appeared at auction since that date, mainly over the
past 30 years. The wine is drawn from the mother cask which is then topped up with a young Rudesheimer of
appropriate quality. In this way the large volume of the old wine is kept refreshed. I first tasted the 1727 at Schloss
Vollrads in 1973 at a tasting of wines of the world to celebrate Count Matushka’s 80th birthday. Another
memorable occasion took place at a dinner in Sydney on the evening of my first visit to Australia in February
1977. By way of welcome, my host, the irrepressible Len Evans had invited the Prime Minister and a group of the
best ‘palates’. Among other fine and rare wines was this 250 year old Hock. Just as it was about to be served,
there was a shattering crash followed by an agonized Australian voice ‘Gee Len, sorry we’ll just have to have the
1928’! (The ‘waiter’ Anders Ousbach, who had dropped a handful of spoons, was a wine expert and opera singer
known for his practical jokes).

[Thor_MN]

7. 1727, but diluted by new wine every time they take some to sell.

sounds like a homeopathic vintage...