Old battery = no hot start?

[FormulaReed]

Took my car out for a drive today. Starts right up cold. Car runs great. Drive to a cars and coffee event. Car starts right up after sitting for like 2 hours. We go for a nice drive and I stop to get a sandwich. Get back in the car and I get no love from the starter.....

I try it a few times and I get the same thing. Look at the voltage gauge and it’s reading in the bottom 25% of the gauge. I call AAA and wait. About an hour goes by and I’m shooting the **** with a guy, he’s asking me about the car so I tell him what’s going on. He suggested that I try it again and it fires right up. I’m the drive home I notice that the voltage gauge is reading in the top 75%.

I drive home and pull out a volt tester. I’m seeing 12.6v when it’s sitting and about 8v when it’s cranking. It turns over well and started up again.

Does this sound like the battery is weak enough to cause the no start? I have no idea how old the battery is. I read that these cars are sensitive to batteries, but this seems a bit much. My car is a 91’.

Cheers,

Reed