Comment by sgeisenh

6 seconds is fast for a luxury sedan, but there are plenty of cars for less than $30k that will do zero-to-sixty in under 6 seconds. The Subaru WRX does 0-60 in under 5 seconds and costs ~$26k. That's the only 4 door car I can think of that's quite that quick, but there are plenty of performance oriented cars in that price range that are very quick.