I recently corner weighed my '85 and the results weren't pretty.
I tried to have the car as close to stock as possible so I could quantify any changes over time. It's an A/C car with a totally stock driveline, including exhaust. I even put the Trons back on it, although they are fitted with 185 Sumitomos. The seats are Sparcos but the particular model weighs just about the same as the stock seats. There is no spare, washer tank, or sound system in the car, but otherwise it's very similar to as-delivered.
The result was 2176 lbs. The caveat is that I don't know how much fuel was in the car. I'd filled it totally in order to weigh the thing "full up", but it had sat for a long time before I weighed it and when I turned on the key to test the new cluster I'd just installed the gauge read just over 1/2. The fuel tank is seeping some at the bottom seam so I'll have to check the new gauge against the original one to be sure, but if it's accurate then my car weighs over 2200 lbs full of fuel, and that's without a spare. :-(
I was so disappointed I put 100 pounds of barbell weights in the front trunk and reweighed the thing. The result was 2276 pounds, so it wasn't the scales.
I think the service manual has A/C 1500 cars at just over 2200 lbs. It seems that, unlike Ferrari weight claims, the factory was being honest in their weight specs.
IIRC, a customer's Elise with factory light weight wheels weighed 1980 lbs on the same scales, which is about right for a street car of that size. 200 pounds is a lot to pare off of a car that I want to keep nice (and air conditioned).