MattW

How long does Champagne keep for? We have a few bottles that have gathered a bit of dust

Can post make\models if it makes a difference.

ProperCharlie

Depends what it is and how it has been stored. Even cheap non vintage champagne should last for a few years, laid down. If it's been upright next to a radiator then it may be not so good...

MattW

Stored upright under the stairs (cool and dark)

Champagne Brossault Brut
Canard Duchene Brut 1990
Moet and Chandon (Boxed)
Albert Etienne

Nicks VR4

Champagne is ready to drink when it is released from the suppliers and does not improve with age. Non-vintage Champagne has a shelf life of two to three years if stored in a cool dark place and on its side.

Best bet stick in the fridge for a while to get it chilled and pop the cork for a taste

ProperCharlie

Not strictly true IMO. Vintage champagne often does improve with a bit of bottle age. Really old champagne becomes very refined, the fizz dies down, it is often superior to something released a year or so ago. At one time I was lucky enough to drink several champagnes from the '50s, '60s and '70s. A few had gone, but most were superb.

BlkKnight

lieing on side is a must (as with any wine) as the wine keeps the cork damp.

If the cork dries out air can get in & oxidise the wine.

Jap2Scrap

I hope you're not confusing the meaning of the word vintage wrt champagne and the word vintage wrt cars.